- Joined Mar 27, 2020
Hi. New to the forum. I'm taking a class, and for this project we were asked to tear down an electronic and analyze the circuit. I chose a cheap battery powered drill that was otherwise destined for the trash. I've torn it apart and mapped the circuit in to a rudimentary drawing (as best I can understand it). Next to it is a photo of the actual assembly. I'm having difficulty understanding what role the MOSFET transistor and the diode play (the transistor is mounted to the underside of the heatsink - you can't really see it in the photo). I have a basic understanding of what each component does, but in this everything seems to move in weird loops. The PCB mainly seems to control the variable speed of the drill. Any input to get me started?
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