https://community.element14.com/learn/learning-center/w/documents/3709/capacitive-touch-tutorial-from-james-lewis---bald-engineeren-USTelligent Community 12https://community.element14.com/learn/learning-center/w/documents/3709/capacitive-touch-tutorial-from-james-lewis---bald-engineerWed, 27 Jun 2018 18:17:03 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f96ede64-fe81-4f56-8624-d64d08ea404dkellyhensenhttps://community.element14.com/learn/learning-center/w/documents/3709/capacitive-touch-tutorial-from-james-lewis---bald-engineer#commentsCurrent Revision posted to Documents by kellyhensen on 6/27/2018 6:17:03 PM<br /> <div style="background:#ffffff;padding:14px 16px 16px 18px;margin:0;vertical-align:top;border:1px solid #dadada;"><div style="float:left;display:inline-block;padding:0px 25px 8px 0px;"><a href="/challengesprojects/element14-presents/"><img alt="image" src="/e14/assets/legacy/2018/e14PresentsJune818.png" width="180px" /></a></div><div style="display:inline-block;vertical-align:top;width:70%;"><span style="font-size:18px;font-weight:bold;">A Capacitive Touch Tutorial</span><p style="margin:0;"><span><a class="jive-link-wiki-small" href="/challenges-projects/element14-presents/vcp-program/w/documents/3704/vcp-biography-james" style="color:#f17c0e;">Bald Engineer&#39;s VCP Profile</a></span>&nbsp; <strong>|</strong>&nbsp; <span style="padding-right:5px;"><a class="jivecontainerTT-hover-container jive-link-community-small" href="/learn/learning-center/online-learning/" style="color:#f17c0e;">Online Learning</a></span></p></div></div><p style="margin:0;padding:0px;clear:both;">&nbsp;</p><p style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;"><span style="font-size:10.5pt;font-family:&#39;Arial&#39;,&#39;sans-serif&#39;;color:#555555;"> <span id="b3b5c451_32eb_480a_950b_d3c902233b55"><span><a href="https://www.youtube.com/watch?v=X7U_6wZqxro">www.youtube.com/watch</a></span></span></span></p><p style="margin:0;padding:0px;">&nbsp;</p><table border="0px" class="jiveBorder mce-item-table" style="border:0px solid #c6c6c6;width:100%;"><tbody><tr><td style="border:0pxpx solid black;border:0px solid #c6c6c6;padding:6px;"><p style="margin:0;"><span style="font-size:10.5pt;font-family:Arial, sans-serif;color:#555555;">Prepare to drink from the firehose!&nbsp; James opens this video with:</span></p><p style="margin:0;"><span style="font-size:10.5pt;font-family:Arial, sans-serif;color:#555555;">&quot;Push buttons do not work without pull-up or pull-down resistors.&quot; </span></p><p style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;">But what if you what a button without a physical button?</p></td><td style="border:0pxpx solid black;border:0px solid #c6c6c6;padding:6px;"><p style="margin:0;">If you need a brush-up on Pull-up resistors,</p><p style="margin:0;">check out this <a class="jive-link-external-small" href="http://www.element14.com/community/docs/DOC-90025" target="_blank">AddOhms Tutoria</a>l (also done by James).</p><p style="margin:0;">link to here</p></td></tr><tr><td style="border:0pxpx solid black;border:0px solid #c6c6c6;padding:6px;"><p style="margin:0;"><span style="font-size:10.5pt;font-family:Arial, sans-serif;color:#555555;">In this video you&#39;ll learn about capacitors. </span></p><p style="margin:0;"><span style="font-size:10.5pt;font-family:Arial, sans-serif;color:#555555;">Capacitors are, at their most basic, two conductive electrode plates separated by a non-conductive dielectric.</span></p><p style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;">An electric field forms between the plates. Different dielectric materials change how much charge can be stored in that field.</p></td><td style="border:0pxpx solid black;border:0px solid #c6c6c6;background-color:#dadada;padding:6px;"><p style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;"><span><a href="https://community.element14.com/resized-image/__size/70x80/__key/communityserver-wikis-components-files/00-00-00-02-19/2502.contentimage_5F00_97520.jpg"><img loading="lazy" alt="image" src="https://community-storage.element14.com/communityserver-components-secureimagefileviewer/communityserver/wikis/components/files/00/00/00/02/19/2502.contentimage_97520.jpg-69x80.jpg?sv=2016-05-31&amp;sr=b&amp;sig=zvBpo76J%2Bq4f4MT7ATKsP2bUHxu2HmX44l1rLwL%2BjOQ%3D&amp;se=2026-04-28T23%3A59%3A59Z&amp;sp=r&amp;_=PQIimEAMKyvf9KWMoQTsgQ==" style="max-height: 80px;max-width: 69px;" /></a></span></p><p style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;">A <span style="color:#222222;font-family:sans-serif;"><strong>dielectric</strong></span><span style="color:#222222;font-family:sans-serif;"> (or </span><span style="color:#222222;font-family:sans-serif;"><strong>dielectric material</strong></span><span style="color:#222222;font-family:sans-serif;">) is an </span><a class="jive-link-external-small" href="https://en.wikipedia.org/wiki/Insulator_(electricity)" rel="nofollow ugc noopener" style="color:#0b0080;background:none #ffffff;font-family:sans-serif;" target="_blank" title="Insulator (electricity)">electrical insulator</a><span style="color:#222222;font-family:sans-serif;"> that can be </span><a class="jive-link-external-small" href="https://en.wikipedia.org/wiki/Dipolar_polarization" rel="nofollow ugc noopener" style="color:#0b0080;background:none #ffffff;font-family:sans-serif;" target="_blank" title="Dipolar polarization">polarized</a><span style="color:#222222;font-family:sans-serif;"> by an applied </span><a class="jive-link-external-small" href="https://en.wikipedia.org/wiki/Electric_field" rel="nofollow ugc noopener" style="color:#0b0080;background:none #ffffff;font-family:sans-serif;" target="_blank" title="Electric field">electric field</a><span style="color:#222222;font-family:sans-serif;">. </span></p></td></tr><tr><td colspan="2" style="border:0pxpx solid black;border:0px solid #c6c6c6;padding:6px;"><p style="margin:0;">In this video you&#39;ll learn about:</p><ul><li>the variables to consider in defining capacitance</li><li>the equation for defining capacitance</li><li>how to measure capacitance in a circuit</li><li>and what is different about capacitance when designing with capacitive touch.</li></ul><p style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;">James rounds out the video with a review of the <span><span class="e14-init-shown" id="addProduct-81xx09ZW-linked" style="white-space:nowrap;"><a class="jive-link-product-addtolist" href="https://www.element14.com/community/view-product.jspa?fsku=2510674&amp;nsku=72Y1733&amp;COM=noscript" target="_blank"><span class="pf-widget-map pf-productlink-cart-icon"></span></a><a class="jive-link-product pf-embedded-product-link" href="https://www.element14.com/community/view-product.jspa?fsku=2510674&amp;nsku=72Y1733&amp;COM=noscript" target="_blank">TI CapTIvate Dev Kit</a></span><span class="e14-init-hidden" id="addProduct-81xx09ZW-unlinked">TI CapTIvate Dev Kit</span></span> - which TI sent him to review.</p><p style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;">Have more questions on capacitance or the Texas Instruments kit?&nbsp; Ask them in the comments below!</p></td></tr></tbody></table><p style="margin:0;"><span><a href="/members/baldengineer">baldengineer</a></span></p><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: capacitve touch, e14presents_baldengineer</div>