Windshield wiper motor actually. I am using it to power an oil pump (power steering pump) to maintain pressure.
I purchased a DC PWM online (I was under the impression it was compatible) but it uses a 5v pot to generate its own PWM. I don't know how to substitute the pot with Arduino input. I get no continuity between it's ground and the main. The schematic is not available.
Can I use Arduino's onboard PWM to switch a transistor such as a MOFSET or BUF654 quick enough to get the same effect on the motor's speed control?