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<p>Hi Rob,</p>
<p>I am switching 25W 12V RGB strips using Si4944DY 30V Dual MOSFETS
from Jaycar - datasheet is at <a class="moz-txt-link-freetext"
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.</p>
<p>I'm also happy to work with you on a board, with headers for the
ESP module, 4 or 6 channels (2 or 3 x dual MOSFETS), screw
terminals and so on. We could even add a 1A 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?</p>
<p>Are you better at KiCad or Eagle than me?<br>
</p>
<p>Mike.</p>
<br>
<div class="moz-cite-prefix">On 17/01/2018 10:02 PM, Rob de Voer
wrote:<br>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Hi
All,</span><span
style="font-size:12.0pt;color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Unfortunately
building a suitable dimmer module so I can control
individual LED lights has thus far proven outside of my
ability.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Who
is able to help me build a 12v dimmer board that can be
controlled remotely using any of Arduino / ESP8266 /
WemosD1R2? <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">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?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Kind
Regards,</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"
lang="EN-NZ">Rob </span><span
style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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