I have been working on controlling servos in one direction with PWM control via GPIO ports on my RPi 3. I’ve worked with motor controllers that use PWM before and it seems that I should be able to provide negative PWM values to indicate the opposite direction, but GPIO seems not to allow that. For my current project, I do need to be able to control one servo in both directions. (Precise positional control would not be necessary, I just need to be able to control direction)
I have found an alternative solution where I can create a jank analog device by hooking up a resistor and capacitor in parallel. If I were to try to achieve positional control of the servo, could I potentially use analog information from this strategy to do so?