Triple MOSFET Controller for Arduino
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Three channels of high power DC switching for Arduino via MOSFET transistors mounted in a vented enclosure with fan.
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Model information
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- Printables
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- Electronics
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- Creative Commons — Attribution — Share Alike
I wanted something that would switch 12V power at high current with low loss, supporting three devices such as high-power LED lamps and motors. I also have always wanted to created a wholly vented box design such as this.
Outside, on the front are four binding posts (ground, three +5V inputs), three activation push buttons, and three activated LEDs (carefully matched for brightness). On the back are binding posts with 12V power input and three switched 12V outputs.
Inside are three 2N7000 N channel MOSFETs buffering the Arduino inputs, and supplying ground on activation to three IRF9540 P channel MOSFETs. A fulltime running fan is connected to the 12V input.
I have printed in PLA and PETG with full automatic tree supports on the QIDI Plus4. The lid attaches with 6 M1.2*5 screws (I found it necessary to drill out the printed holes first).
The PDF contains scans of my design drawings. It might come in handy if someone decides to build one.
Source: https://www.tinkercad.com/things/ceCmjG0uPHQ-triple-mosfet-v2