https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615en-USTelligent Community 12https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615Wed, 08 Nov 2023 20:04:58 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6tariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsCurrent Revision posted to Documents by tariq.ahmad on 11/8/2023 8:04:58 PM<br /> <p>Do you have an Idea for a product? A lot of us have them! Clem takes you on a journey through the most common troubles you might have with your first generation prototype and shares some practical tips to give you an easier experience. As&nbsp;an&nbsp;example product he builds a USB card reader with added current control functionality, and debugs the typical problems that come with quick and dirty prototyping work!</p> <h2 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video</span></h2> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span><img style="max-height:360px;max-width:640px;" alt="Schematics" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m38s032.png" /><br /></span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="CAD" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m47s007.png" /></span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="PCB Closeup" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m12s795.png" /></span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="Holding PCB" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m37s453.png" /></span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h2 id="mcetoc_1h711k1vi2"><span>Bonus Content</span></h2> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014" data-e14adj="t">Download CAD and Schematics</a></li> <li>&nbsp;<a href="https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615">Building a Unique USB Card Reader: From Idea to Prototype -- Episode 615</a>&nbsp;&nbsp;</li> </ul> <h2 id="mcetoc_1h711mj723">Bill of Material</h2> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-ff613" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ff613'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-a3e1c" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('a3e1c'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-2950e" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('2950e'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-ed853" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ed853'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-0a54c" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('0a54c'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-49172" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('49172'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-fd3de" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('fd3de'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-5c755" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('5c755'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-f82c0" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('f82c0'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-6501d" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('6501d'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/" data-e14adj="t"><img loading="lazy" alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/" data-e14adj="t">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem" data-e14adj="t">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/" data-e14adj="t">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design, friday_release</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/8Fri, 11 Aug 2023 13:47:53 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6pchanhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 8 posted to Documents by pchan on 8/11/2023 1:47:53 PM<br /> <p>Do you have an Idea for a product? A lot of us have them! Clem takes you on a journey through the most common troubles you might have with your first generation prototype and shares some practical tips to give you an easier experience. As&nbsp;an&nbsp;example product he builds a USB card reader with added current control functionality, and debugs the typical problems that come with quick and dirty prototyping work!</p> <h2 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video</span></h2> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span><img style="max-height:360px;max-width:640px;" alt="Schematics" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m38s032.png" /><br /></span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="CAD" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m47s007.png" /></span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="PCB Closeup" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m12s795.png" /></span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="Holding PCB" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m37s453.png" /></span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h2 id="mcetoc_1h711k1vi2"><span>Bonus Content</span></h2> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014" data-e14adj="y">Download CAD and Schematics</a></li> </ul> <h2 id="mcetoc_1h711mj723">Bill of Material</h2> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-de394" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('de394'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-1a584" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('1a584'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-15c94" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('15c94'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-d06fb" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('d06fb'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-c700c" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c700c'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-12c09" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('12c09'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-b782e" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('b782e'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-9a7f1" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('9a7f1'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-e3ef0" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('e3ef0'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-81b93" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('81b93'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/" data-e14adj="y"><img loading="lazy" alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/" data-e14adj="y">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem" data-e14adj="y">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/" data-e14adj="y">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design, friday_release</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/9Fri, 11 Aug 2023 07:24:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6Matthttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 9 posted to Documents by Matt on 8/11/2023 7:24:00 AM<br /> <p>Do you have an Idea for a product? A lot of us have them! Clem takes you on a journey through the most common troubles you might have with your first generation prototype and shares some practical tips to give you an easier experience. As&nbsp;an&nbsp;example product he builds a USB card reader with added current control functionality, and debugs the typical problems that come with quick and dirty prototyping work!</p> <h2 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video</span></h2> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span><img style="max-height:360px;max-width:640px;" alt="Schematics" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m38s032.png" /><br /></span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="CAD" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m47s007.png" /></span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="PCB Closeup" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m12s795.png" /></span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="Holding PCB" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m37s453.png" /></span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h2 id="mcetoc_1h711k1vi2"><span>Bonus Content</span></h2> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014" data-e14adj="t">Download CAD and Schematics</a></li> </ul> <h2 id="mcetoc_1h711mj723">Bill of Material</h2> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-52b23" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('52b23'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-31284" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('31284'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-cee49" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('cee49'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-c8934" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c8934'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-5f580" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('5f580'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-4d084" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('4d084'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-9bd87" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('9bd87'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-e3894" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('e3894'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-bce7e" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('bce7e'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-2da36" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('2da36'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/" data-e14adj="t"><img loading="lazy" alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/" data-e14adj="t">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem" data-e14adj="t">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/" data-e14adj="t">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design, friday_release</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/6Mon, 07 Aug 2023 10:11:44 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6cstantonhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 6 posted to Documents by cstanton on 8/7/2023 10:11:44 AM<br /> <p>Do you have an Idea for a product? A lot of us have them! Clem takes you on a journey through the most common troubles you might have with your first generation prototype and shares some practical tips to give you an easier experience. As&nbsp;an&nbsp;example product he builds a USB card reader with added current control functionality, and debugs the typical problems that come with quick and dirty prototyping work!</p> <h2 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video</span></h2> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span><img style="max-height:360px;max-width:640px;" alt="Schematics" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-04-35/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m38s032.png" /><br /></span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="CAD" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-04-35/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m47s007.png" /></span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="PCB Closeup" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-04-35/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m12s795.png" /></span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="Holding PCB" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-04-35/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m37s453.png" /></span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h2 id="mcetoc_1h711k1vi2"><span>Bonus Content</span></h2> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014">Download CAD and Schematics</a></li> </ul> <h2 id="mcetoc_1h711mj723">Bill of Material</h2> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-21d97" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('21d97'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-5e6d3" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('5e6d3'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-f4872" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('f4872'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-817b1" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('817b1'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-82657" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('82657'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-84e4a" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('84e4a'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-04815" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('04815'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-15b67" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('15b67'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-41f1f" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('41f1f'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-4a0ea" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('4a0ea'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img loading="lazy" alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/7Mon, 07 Aug 2023 10:11:44 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6pchanhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 7 posted to Documents by pchan on 8/7/2023 10:11:44 AM<br /> <p>Do you have an Idea for a product? A lot of us have them! Clem takes you on a journey through the most common troubles you might have with your first generation prototype and shares some practical tips to give you an easier experience. As&nbsp;an&nbsp;example product he builds a USB card reader with added current control functionality, and debugs the typical problems that come with quick and dirty prototyping work!</p> <h2 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video</span></h2> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span><img style="max-height:360px;max-width:640px;" alt="Schematics" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m38s032.png" /><br /></span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="CAD" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m47s007.png" /></span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="PCB Closeup" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m12s795.png" /></span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="Holding PCB" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-03-81/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m37s453.png" /></span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h2 id="mcetoc_1h711k1vi2"><span>Bonus Content</span></h2> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014" data-e14adj="y">Download CAD and Schematics</a></li> </ul> <h2 id="mcetoc_1h711mj723">Bill of Material</h2> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-4842f" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('4842f'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-60b7f" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('60b7f'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-41a30" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('41a30'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-952c9" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('952c9'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-182b2" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('182b2'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-f19a7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('f19a7'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-7c5d7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('7c5d7'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-85583" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('85583'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-ee8a7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ee8a7'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-6fee7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('6fee7'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/" data-e14adj="y"><img loading="lazy" alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/" data-e14adj="y">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem" data-e14adj="y">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/" data-e14adj="y">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/5Mon, 07 Aug 2023 10:07:03 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6cstantonhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 5 posted to Documents by cstanton on 8/7/2023 10:07:03 AM<br /> <p>Do you have an Idea for a product? A lot of us have them! Clem takes you on a journey through the most common troubles you might have with your first generation prototype and shares some practical tips to give you an easier experience. As&nbsp;an&nbsp;example product he builds a USB card reader with added current control functionality, and debugs the typical problems that come with quick and dirty prototyping work!</p> <h2 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video</span></h2> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span><img style="max-height:360px;max-width:640px;" alt="Schematics" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-04-35/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m38s032.png" /><br /></span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="CAD" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-04-35/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h07m47s007.png" /></span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="PCB Closeup" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-04-35/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m12s795.png" /></span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;<img loading="lazy" style="max-height:360px;max-width:640px;" alt="Pointing at PCB" src="/resized-image/__size/1280x720/__key/communityserver-wikis-components-files/00-00-00-04-35/vlcsnap_2D00_2023_2D00_08_2D00_03_2D00_11h08m28s349.png" /></span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h2 id="mcetoc_1h711k1vi2"><span>Bonus Content</span></h2> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014">Download CAD and Schematics</a></li> </ul> <h2 id="mcetoc_1h711mj723">Bill of Material</h2> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-f3c8a" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('f3c8a'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-b9a69" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('b9a69'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-ad09c" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ad09c'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-ab027" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ab027'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-fcfe7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('fcfe7'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-374b8" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('374b8'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-81eb4" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('81eb4'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-c205a" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c205a'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-52546" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('52546'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-1df6e" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('1df6e'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img loading="lazy" alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/4Fri, 04 Aug 2023 20:15:32 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6jordanrjohnsonhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 4 posted to Documents by jordanrjohnson on 8/4/2023 8:15:32 PM<br /> <p>Do you have an Idea for a product? A lot of us have them! Clem takes you on a journey through the most common troubles you might have with your first generation prototype and shares some practical tips to give you an easier experience. As&nbsp;an&nbsp;example product he builds a USB card reader with added current control functionality, and debugs the typical problems that come with quick and dirty prototyping work!</p> <h3 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video:</span></h3> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span>&nbsp;</span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711k1vi2"><span>Bonus Content:</span></h3> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014">Download CAD and Schematics</a></li> </ul> <h3 id="mcetoc_1h711mj723">Bill of Material:</h3> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-7ba50" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('7ba50'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-48dde" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('48dde'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-f1d9f" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('f1d9f'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-ee6a5" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ee6a5'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-4d55f" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('4d55f'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-ba3b2" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ba3b2'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-5d9df" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('5d9df'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-fec15" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('fec15'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-be95e" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('be95e'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-82bf8" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('82bf8'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/3Fri, 04 Aug 2023 20:13:53 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6tariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 3 posted to Documents by tariq.ahmad on 8/4/2023 8:13:53 PM<br /> <p>Do you have an Idea for a product? A lot of us have. them! Clem takes you on a journey through the most common troubles you might have with your first generation prototype and shares some practical tips, to give you an easier experience. As&nbsp;an&nbsp;example product he builds a USB card reader with added current control functionality, and debugs the typical problems that come with quick and dirty prototyping work!</p> <h3 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video:</span></h3> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span>&nbsp;</span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711k1vi2"><span>Bonus Content:</span></h3> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014">Download CAD and Schematics</a></li> </ul> <h3 id="mcetoc_1h711mj723">Bill of Material:</h3> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-2d870" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('2d870'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-60b16" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('60b16'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-bffde" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('bffde'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-312ee" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('312ee'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-900d6" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('900d6'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-c258d" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c258d'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-c84b7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c84b7'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-7438b" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('7438b'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-83aad" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('83aad'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-ed240" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ed240'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/2Fri, 04 Aug 2023 20:02:34 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6tariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 2 posted to Documents by tariq.ahmad on 8/4/2023 8:02:34 PM<br /> <p><span class="TextRun SCXW237858144 BCX0" lang="EN-US" data-contrast="auto"><span class="NormalTextRun SCXW237858144 BCX0">In this episode of </span><span class="NormalTextRun SCXW237858144 BCX0">e</span><span class="NormalTextRun SCXW237858144 BCX0">lement14 </span><span class="NormalTextRun SCXW237858144 BCX0">p</span><span class="NormalTextRun SCXW237858144 BCX0">resents, Clem designs and builds a unique USB card reader, starting from the </span><span class="NormalTextRun SCXW237858144 BCX0">initial</span><span class="NormalTextRun SCXW237858144 BCX0"> idea to the first prototype. Facing various challenges and pitfalls during the process, he learns valuable lessons in iterative prototyping and testing. Clem emphasizes the significance of adding test points for easy debugging</span><span class="NormalTextRun SCXW237858144 BCX0">,</span><span class="NormalTextRun SCXW237858144 BCX0"> and shares insights into using standard enclosures for small-batch production. Throughout the video, he </span><span class="NormalTextRun SCXW237858144 BCX0">showcases</span><span class="NormalTextRun SCXW237858144 BCX0"> the importance of collaboration and learning within the maker community, encouraging viewers to share their experiences on the </span><span class="NormalTextRun SCXW237858144 BCX0">e</span><span class="NormalTextRun SCXW237858144 BCX0">lement14 platform.</span></span><span class="EOP SCXW237858144 BCX0">&nbsp;</span></p> <h3 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video:</span></h3> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span>&nbsp;</span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711k1vi2"><span>Bonus Content:</span></h3> <ul> <li><a href="/challenges-projects/element14-presents/secret-element14-presents/m/files/148014">Download CAD and Schematics</a></li> </ul> <h3 id="mcetoc_1h711mj723">Bill of Material:</h3> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-38a57" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('38a57'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-b0151" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('b0151'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-2faac" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('2faac'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-a120a" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('a120a'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-17aba" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('17aba'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-21d03" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('21d03'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-aeab4" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('aeab4'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-fb5bf" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('fb5bf'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-9e20a" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('9e20a'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-ddcb7" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('ddcb7'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr class="xs-hide"> <td>&nbsp;</td> <td></td> <td></td> <td></td> </tr> </tbody> </table> <p></p> <div style="background:#ffffff;border:1px solid #dadada;margin:0;padding:14px 16px 16px 18px;vertical-align:top;"> <div style="display:inline-block;float:left;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img alt="element14 presents" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"></div> <div style="display:inline-block;vertical-align:top;width:70%;"><br /> <p style="margin:0;"><span><a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/">element14 presents</a></span>&nbsp; <strong>|</strong>&nbsp; <a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design</div> https://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615/revision/1Fri, 04 Aug 2023 19:59:33 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:14a22c8b-a45f-4401-9dc3-f724ff7fa6b6tariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/project-videos/w/documents/28290/building-a-unique-usb-card-reader-from-idea-to-prototype----episode-615#commentsRevision 1 posted to Documents by tariq.ahmad on 8/4/2023 7:59:33 PM<br /> <p><span class="TextRun SCXW237858144 BCX0" lang="EN-US" data-contrast="auto"><span class="NormalTextRun SCXW237858144 BCX0">In this episode of </span><span class="NormalTextRun SCXW237858144 BCX0">e</span><span class="NormalTextRun SCXW237858144 BCX0">lement14 </span><span class="NormalTextRun SCXW237858144 BCX0">p</span><span class="NormalTextRun SCXW237858144 BCX0">resents, Clem designs and builds a unique USB card reader, starting from the </span><span class="NormalTextRun SCXW237858144 BCX0">initial</span><span class="NormalTextRun SCXW237858144 BCX0"> idea to the first prototype. Facing various challenges and pitfalls during the process, he learns valuable lessons in iterative prototyping and testing. Clem emphasizes the significance of adding test points for easy debugging</span><span class="NormalTextRun SCXW237858144 BCX0">,</span><span class="NormalTextRun SCXW237858144 BCX0"> and shares insights into using standard enclosures for small-batch production. Throughout the video, he </span><span class="NormalTextRun SCXW237858144 BCX0">showcases</span><span class="NormalTextRun SCXW237858144 BCX0"> the importance of collaboration and learning within the maker community, encouraging viewers to share their experiences on the </span><span class="NormalTextRun SCXW237858144 BCX0">e</span><span class="NormalTextRun SCXW237858144 BCX0">lement14 platform.</span></span><span class="EOP SCXW237858144 BCX0">&nbsp;</span></p> <h3 id="mcetoc_1h711h59s1"><span class="EOP SCXW237858144 BCX0">Watch the Video:</span></h3> <p><span class="EOP SCXW237858144 BCX0"><a href="https://www.youtube.com/watch?v=X7jP6dPZnks">www.youtube.com/watch</a></span></p> <p><span class="EOP SCXW237858144 BCX0"></span></p> <p><span data-contrast="auto">In this episode of element14 presents, Clem takes us from idea to prototype as he builds a unique USB card reader. He starts by explaining that many new products are iterations of existing ones, and he wants to create a card reader that caters to electronics enthusiasts like himself. His old card reader was failing and he couldn&#39;t find a suitable replacement, so he decided to make his own.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711gson0"><span>&nbsp;</span></h3> <p><span data-contrast="auto">Clem breaks down the components of a USB card reader. For his project, he chooses a combined USB hub and media controller. To help determine if the form factor is achievable, he&rsquo;ll need to design a PCB for the controller.&nbsp; He uses a separate ESP microcontroller to enable control of output current via software.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">Throughout the process, Clem faces challenges and pitfalls. There are issues with the USB connectors in the initial prototype, which he attributes to errors in the reflow soldering process. Some of the pins in the USB hub were not properly connected. He also faces problems with SD card detection, which he diagnoses with additional measurements and a look back at the datasheet. Despite these issues, he emphasizes that such troubles are typical during the initial prototyping phase and can be invaluable for learning.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">Clem discusses his choice of standard enclosures from Hammond Manufacturing, which offers a cost-effective and reliable solution for small-batch production. He also points out the importance of adding test points to the PCB for easier debugging in future iterations.</span><span>&nbsp;</span></p> <p><span>&nbsp;</span></p> <p><span data-contrast="auto">The video showcases the importance of iterative prototyping and testing. Clem acknowledges that the first prototype may not be perfect, but it helps him identify and resolve potential problems early on.</span><span>&nbsp;</span></p> <h3 id="mcetoc_1h711k1vi2"><span>Bonus Content:</span></h3> <ul> <li>Download CAD and Schematics</li> </ul> <h3 id="mcetoc_1h711mj723">Bill of Material:</h3> <table class="e14-product-bom-main"> <tbody> <tr> <th>Product Name</th> <th>Manufacturer</th> <th>Quantity</th> <th><a id="e14-product-link-9f6b9" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140&nsku=45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('9f6b9'));" data-farnell="3122678,1107406,2524076~2,1759056~2,3498536,2361595,2292611,2763747,9186140" data-newark="45J0735,98K3046,33AC7773 ~2,33R0420~2,PSG91486,06X3895,69W6735 ,06X3872,97K9465" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea=",,undefined~2,undefined~2,,,,," data-avnetema=",,undefined~2,undefined~2,,,,," data-avnetasia=",,undefined~2,undefined~2,,,,," >Buy Kit</a> </th> </tr> <tr> <td>LM317AT/NOPB</td> <td>TI</td> <td>1</td> <td><a id="e14-product-link-2ca33" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3122678&nsku=45J0735&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_BUY_KIT" class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('2ca33'));" data-farnell="3122678" data-newark="45J0735" data-comoverride="" data-cmpoverride="" data-cpc="no ti part, onsemi of newark" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>VISHAY SMD Current Sense Resistor, 0.1 ohm, WSL, 2512 [6432 Metric], 1 W, &plusmn; 1%, Metal Strip</td> <td>Vishay</td> <td>1</td> <td><a id="e14-product-link-c9b7f" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1107406&nsku=98K3046&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('c9b7f'));" data-farnell="1107406" data-newark="98K3046" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MOLEX USB Connector, USB Type C, USB 3.1, Receptacle, 24 Ways, Surface Mount, Right Angle</td> <td></td> <td>2</td> <td><a id="e14-product-link-3480e" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2524076&nsku=33AC7773 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('3480e'));" data-farnell="2524076" data-newark="33AC7773 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO SMD Multilayer Ceramic Capacitor, 18 pF, 50 V, 0603 [1608 Metric], &plusmn; 5%, C0G / NP0, MC</td> <td>Multicomp pro</td> <td>2</td> <td><a id="e14-product-link-14590" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=1759056&nsku=33R0420&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('14590'));" data-farnell="1759056" data-newark="33R0420" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>PRO SIGNAL USB 2.0 A Plug to USB Type-C Cable, 1m White</td> <td>Pro signal</td> <td>1</td> <td><a id="e14-product-link-e6c73" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=3498536&nsku=PSG91486&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('e6c73'));" data-farnell="3498536" data-newark="PSG91486" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, 1455 Series, Extruded With Metal End Panels, Small, Extruded Aluminium, 49.7 mm</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-02977" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2361595&nsku=06X3895&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('02977'));" data-farnell="2361595" data-newark="06X3895" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MICROCHIP USB Interface, Flash Media Controller, USB 2.0, 3 V, 3.6 V, QFN, 48 Pins</td> <td>Microchip</td> <td>1</td> <td><a id="e14-product-link-2c6b2" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2292611&nsku=69W6735 &COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('2c6b2'));" data-farnell="2292611" data-newark="69W6735 " data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>HAMMOND Metal Enclosure, Small, Extruded Aluminium, 12 mm, 70 mm, 101 mm, IP54</td> <td>Hammond</td> <td>1</td> <td><a id="e14-product-link-d0f70" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=2763747&nsku=06X3872&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('d0f70'));" data-farnell="2763747" data-newark="06X3872" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="undefined" data-avnetema="undefined" data-avnetasia="undefined" >Buy Now</a> </td> </tr> <tr> <td>MULTICOMP PRO Memory Card Connector, SD, Push-Push, 9 Contacts, Copper Alloy, Gold Plated Contacts, SDAMB</td> <td>Multicomp</td> <td>1</td> <td><a id="e14-product-link-d87e8" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="https://referral.element14.com/OrderCodeView?fsku=9186140&nsku=97K9465&COM=e14c-noscript&CMP=e14c-noscript&osetc=e14-noscript-tracking-loss" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('d87e8'));" data-farnell="9186140" data-newark="97K9465" data-comoverride="" data-cmpoverride="" 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href="/challenges-projects/element14-presents/vcp-program/w/documents/3692/vcp-biography-clem">About Clem</a>&nbsp; <strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challengesprojects/element14-presents/project-videos/">Project Videos</a></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: USB card reader, Troubleshooting USB, SD card reader, Custom PCB layout, Electronics prototyping tips, USB gadget development, DIY electronics project, Microcontroller current control, USB device testing, Product development process, USB hub design, electronics DIY, Prototype development, DIY tech project, pcb design</div>