I have a DC motor controller which specifies a PWM input of 50 ms (20Hz). Unfortunately, the board which generates that PWM signal is faulty. I'm looking for the possibilty of building a small prototype where I can provide that PWM signal of 20 Hz and vary the duty cycle with a pot. Is this possible with Arduino?
Note: The board won't work with higher frequencies. I think that it could work with something between 20 to 50 Hz. But the designer specifies 20 Hz.