https://community.element14.com/challenges-projects/element14-presents/dc-to-daylight/w/documents/27565/how-electromechanical-relays-work----dc-to-daylight-09en-USTelligent Community 12https://community.element14.com/challenges-projects/element14-presents/dc-to-daylight/w/documents/27565/how-electromechanical-relays-work----dc-to-daylight-09Wed, 06 Apr 2022 07:24:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0a10ffcc-48db-4fa4-a9f7-a69b69cc6c0fMatthttps://community.element14.com/challenges-projects/element14-presents/dc-to-daylight/w/documents/27565/how-electromechanical-relays-work----dc-to-daylight-09#commentsCurrent Revision posted to Documents by Matt on 4/6/2022 7:24:00 AM<br /> <p><a href="https://www.youtube.com/watch?v=CG2K1DI5DRk">www.youtube.com/watch</a></p> <p style="background-color:#e9f6fc;border:1px solid #b8d7e5;margin:0;max-width:744px;padding:8px;">In this theory-based episode, we take a quick look at the evolution of the relay, how it changed telegraphy, and how to actuate a relay safely from a low-current source like a microcontroller. The method I typically use to select the proper base resistor for a given BJT transistor is presented, as well as why you always see a freewheel protection diode across the relay coil; the resulting waveform with, and without protection diode are viewed on the oscilloscope.</p> <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 alt="element14 presents" src="/e14/assets/legacy/2021/e14PDCtoDaylight2021.png" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"> <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> <a class="jive-link-wiki-small" href="/challengesprojects/element14-presents/vcp-program/w/documents/4139/vcp-biography-derek" data-e14adj="t">About Derek</a>&nbsp;&nbsp;<strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challenges-projects/element14-presents/dc-to-daylight/" data-e14adj="t">DC to Daylight</a></p> <p style="margin:0;"></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: transistor driver, drive relay, derek, electromechanical relay, electromagnet, morse relay, relay</div> https://community.element14.com/challenges-projects/element14-presents/dc-to-daylight/w/documents/27565/how-electromechanical-relays-work----dc-to-daylight-09/revision/2Mon, 06 Feb 2023 13:55:07 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0a10ffcc-48db-4fa4-a9f7-a69b69cc6c0ftariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/dc-to-daylight/w/documents/27565/how-electromechanical-relays-work----dc-to-daylight-09#commentsRevision 2 posted to Documents by tariq.ahmad on 2/6/2023 1:55:07 PM<br /> <p><a href="https://www.youtube.com/watch?v=CG2K1DI5DRk">www.youtube.com/watch</a></p> <p style="background-color:#e9f6fc;border:1px solid #b8d7e5;margin:0;max-width:744px;padding:8px;">In this theory-based episode, we take a quick look at the evolution of the relay, how it changed telegraphy, and how to actuate a relay safely from a low-current source like a microcontroller. The method I typically use to select the proper base resistor for a given BJT transistor is presented, as well as why you always see a freewheel protection diode across the relay coil; the resulting waveform with, and without protection diode are viewed on the oscilloscope.</p> <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/2021/e14PDCtoDaylight2021.png" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"> <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> <a class="jive-link-wiki-small" href="/challengesprojects/element14-presents/vcp-program/w/documents/4139/vcp-biography-derek">About Derek</a>&nbsp;&nbsp;<strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challenges-projects/element14-presents/dc-to-daylight/">DC to Daylight</a></p> <p style="margin:0;"></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: transistor driver, drive relay, derek, electromechanical relay, electromagnet, morse relay, relay</div> https://community.element14.com/challenges-projects/element14-presents/dc-to-daylight/w/documents/27565/how-electromechanical-relays-work----dc-to-daylight-09/revision/1Thu, 31 Mar 2022 12:43:18 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0a10ffcc-48db-4fa4-a9f7-a69b69cc6c0ftariq.ahmadhttps://community.element14.com/challenges-projects/element14-presents/dc-to-daylight/w/documents/27565/how-electromechanical-relays-work----dc-to-daylight-09#commentsRevision 1 posted to Documents by tariq.ahmad on 3/31/2022 12:43:18 PM<br /> <p><a href="https://www.youtube.com/watch?v=CG2K1DI5DRk">www.youtube.com/watch</a></p> <p style="background-color:#e9f6fc;border:1px solid #b8d7e5;margin:0;max-width:744px;padding:8px;">In this theory-based episode, we take a quick look at the evolution of the relay, how it changed telegraphy, and how to actuate a relay safely from a low-current source like a microcontroller. The method I typically use to select the proper base resistor for a given BJT transistor is presented, as well as why you always see a freewheel protection diode across the relay coil; the resulting waveform with, and without protection diode are viewed on the oscilloscope.</p> <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/2021/e14PDCtoDaylight2021.png" /></a></div> <div style="display:inline-block;vertical-align:top;width:70%;"> <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> <a class="jive-link-wiki-small" href="/challengesprojects/element14-presents/vcp-program/w/documents/4139/vcp-biography-derek">About Derek</a>&nbsp;&nbsp;<strong>|</strong>&nbsp; <a class="jivecontainerTT-hover-container jive-link-community-small" href="/challenges-projects/project14/dc-to-daylight/">DC to Daylight</a></p> <p style="margin:0;"></p> </div> </div><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: transistor driver, drive relay, derek, electromechanical relay, electromagnet, morse relay, relay</div>