I decided to create a DC motor controller board using a H-bridge chip
After milling and populating the board, I noticed that when I supplied
12V power to the board, I was measuring only 0V at the connector.
For some reason, the board was drawing the 12V to 0.
I learned that this was due to my use of a MOSFET instead of
a 5V regulator chip. After replacing that, I was able to see
the appropriate voltages at the Vcc points of the board.
After that I was able to use Avrdude to program the fuses,
but when I programmed the motor control code, I got an RC-1 error.
I was not able to find any shorts in the board. I
tried replacing the microcontroller but that didn't help either.
At one point, I accidentally plugged the power into the motor
connector and it cause the board to draw the power supply connected to
it to 0V again.
At this point, I decided to use an off-the-shelf motor driver instead.
After making all the connections as specified, I was able to write a
simple PWM sketch on Arduino to contorl the motor:
