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<body><div>Guys,<br></div>
<div><br></div>
<div>Anyway to get in on this as a discussion. I may not be able to bring much to the table but I can 'break' things?<br></div>
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<div>regards,<br></div>
<div><br></div>
<div>Andrew</div>
<div><br></div>
<div><br></div>
<div>On Wed, Jan 17, 2018, at 20:06, Rob de Voer wrote:<br></div>
<blockquote type="cite"><div><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext">Hello Mike,</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext">Yes, a design based on Mosfets seems to be best way to go.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext">How do you use the RGB strips? Still on your workbench or installed in your house?</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext">Have some step down regulators to convert the 12v to 3.3or 5v and can also bring ESP32, Arduino and WemosD1 R2 as alternatives to drive the gate.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext">Would be great to get together and sort this out.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"> </span></span></span></span><br></p><div><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext">I have no relevant experience with any PCB design work (am a mechanical engineer with 30+ years of software development experience), played around in Fritzing to create my designs but never turned any of those into PCBs.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext">The couple of boards I made consist of soldered tracks on test boards…</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext">Will email my contact details offline to arrange getting together.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"><span class="font" style="font-family:Arial, sans-serif"><span class="size" style="font-size:10pt"> </span></span></span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"><span class="font" style="font-family:Arial, sans-serif"><span class="size" style="font-size:10pt">Kind Regards,<br>Rob</span></span></span></span></span></span></p></div>
<p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="colour" style="color:windowtext"> </span></span></span></span><br></p><div><div style="border-right-width:initial;border-bottom-width:initial;border-left-width:initial;border-right-style:none;border-bottom-style:none;border-left-style:none;border-right-color:initial;border-bottom-color:initial;border-left-color:initial;border-image-source:initial;border-image-slice:initial;border-image-width:initial;border-image-outset:initial;border-image-repeat:initial;border-top-width:1pt;border-top-style:solid;border-top-color:rgb(225, 225, 225);padding-top:3pt;padding-right:0cm;padding-bottom:0cm;padding-left:0cm;"><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><b><span class="colour" style="color:windowtext">From:</span></b><span class="colour" style="color:windowtext"> Mike Field [mailto:hamster@snap.net.nz] <br><b>Sent:</b> 17 January 2018 22:38<br><b>To:</b> Rob de Voer <rob@businesspalz.com><br><b>Subject:</b> Re: [chbot] In need of dimmer board to control 12v LED via Arduino</span></span></span></span></p></div>
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<p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"> </span></span></span><br></p><p>Hi Rob,<br></p><p>I am switching 25W 12V RGB strips using Si4944DY 30V Dual MOSFETS from Jaycar - datasheet is at <a style="text-decoration: underline; color: rgb(5, 99, 193);" href="https://www.vishay.com/docs/72512/72512.pdf">https://www.vishay.com/docs/72512/72512.pdf</a> They are tiny SOIC8 packages, and can switch about 10A (!)<br></p><p>'On' resistance is less than 0.02 Ohm, These are old parts, the replacement Si4946 are rated at 60V. I've got 10 of these on their way from my mate Ali E in China for $1 each :-)<br></p><p>I've got a couple mounted on DIP adapters, on a breadboard with an ESP32 driving the gate through a current limiting resistor. You are more than welcome pop over and either experiment with them - I can hook your load up to a PSU and a function generator driving the gate), or take one away to play with.<br></p><p>I'm also happy to work with you on a board, with headers for the ESP module, 6(?) channels (3 dual MOSFETS), screw terminals and so on. We could even add a 5V0 or 3V3 regulator to power whatever is controlling the lights. I'll got all the bits here or almost here, just not enough motivation to move it off the breadboard to a PCB. - fancy a Saturday afternoon / evening project session?<br></p><p>Are you better at KiCad or Eagle than me?<br></p><p>Mike.<br></p><div><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt">On 17/01/2018 10:02 PM, Rob de Voer wrote:</span></span></span><br></p></div>
<blockquote style="margin-top:5pt;margin-bottom:5pt;"><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"> </span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt">Hi All,</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt">I have been gradually replacing the 240v lighting in my house with 12v LED lights all powered by one 12v transformer and switched through a home automation system made up of several Arduino boards and one RaspBerryPI3.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt">I want to start installing higher powered LEDs (21w 12v or more), dim them to the low output for daily needs, and adjust the dimmer as needed.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt">Unfortunately building a suitable dimmer module so I can control individual LED lights has thus far proven outside of my ability.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt">Have tried some of the published designs but have to resign myself to the fact that I should stick to building software since i appear unable to convert any of the myriad of example project to my needs.</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt">Who is able to help me build a 12v dimmer board that can be controlled remotely using any of Arduino / ESP8266 / WemosD1R2? </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt">Do I need to limit myself to a specific power (i.e. 21w LED) for the dimmer to work efficiently or is a good design not that restrictive?</span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="size" style="font-size:12pt"> </span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="font" style="font-family:Arial, sans-serif"><span class="size" style="font-size:10pt">Kind Regards,</span></span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span class="font" style="font-family:Arial, sans-serif"><span class="size" style="font-size:10pt">Rob</span></span></span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"> </span></span></span><br></p><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span style=""><br><br></span></span></span></span></p><pre style="color: black; font-family: "Courier New"; font-size: 10pt; margin: 0cm 0cm 0.0001pt;">_______________________________________________<br></pre><pre style="color: black; font-family: "Courier New"; font-size: 10pt; margin: 0cm 0cm 0.0001pt;">Chchrobotics mailing list <a style="text-decoration: underline; color: rgb(5, 99, 193);" href="mailto:Chchrobotics@lists.ourshack.com">Chchrobotics@lists.ourshack.com</a><br></pre><pre style="color: black; font-family: "Courier New"; font-size: 10pt; margin: 0cm 0cm 0.0001pt;"><a style="text-decoration: underline; color: rgb(5, 99, 193);" href="https://lists.ourshack.com/mailman/listinfo/chchrobotics">https://lists.ourshack.com/mailman/listinfo/chchrobotics</a><br></pre><pre style="color: black; font-family: "Courier New"; font-size: 10pt; margin: 0cm 0cm 0.0001pt;">Mail Archives: <a style="text-decoration: underline; color: rgb(5, 99, 193);" href="http://lists.ourshack.com/pipermail/chchrobotics/">http://lists.ourshack.com/pipermail/chchrobotics/</a><br></pre><pre style="color: black; font-family: "Courier New"; font-size: 10pt; margin: 0cm 0cm 0.0001pt;">Meetings usually 3rd Monday each month. See <a style="text-decoration: underline; color: rgb(5, 99, 193);" href="http://kiwibots.org">http://kiwibots.org</a> for venue, directions and dates.<br></pre><pre style="color: black; font-family: "Courier New"; font-size: 10pt; margin: 0cm 0cm 0.0001pt;">When replying, please edit your Subject line to reflect new subjects.<br></pre></blockquote><p style="margin: 0cm 0cm 0.0001pt;"><span class="colour" style="color:black"><span class="font" style="font-family:Calibri, sans-serif"><span class="size" style="font-size:11pt"><span style=""> </span></span></span></span><br></p></div>
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<div>Chchrobotics mailing list <a style="text-decoration: underline; color: rgb(5, 99, 193);" href="mailto:Chchrobotics@lists.ourshack.com">Chchrobotics@lists.ourshack.com</a><br></div>
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<div>Meetings usually 3rd Monday each month. See <a style="text-decoration: underline; color: rgb(5, 99, 193);" href="http://kiwibots.org">http://kiwibots.org</a> for venue, directions and dates.<br></div>
<div>When replying, please edit your Subject line to reflect new subjects.<br></div>
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