This circuit powers an arm-mounted circular-saw that I developed for a mad doctor costume this last Halloween. Along with the spinning foam blade it also features a smoking effect, lights, and sound. It's all coordinated by an Arduino Nano mounted in this PCB.
**WARNING:** This board layout still has a bug in it. Two of the pins on the FQP30N06L mosfets are flipped. I let EasyEDA know about the...
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