I'm trying to control a massive array of motorized faders (like these:
http://www.alps.com/WebObjects/catalog.woa/E/HTML/Potentiometer/SlidePotentiometers/RSN1M/RSN1M_list.html ).
I'm able to control them manually by reading the analog in from the slide pot and controlling the attached DC motor with a PWM motor controller. This works fine for a few, but when you get up to 100's it starts to get really inefficient.
I'm wondering if a custom servo type IC would be the solution. Something kind of like your motor controller, but with an analog input (for the slide pot) and enough on-board smarts to use a PWM position signal to drive the motor to a specific position - basically turning the whole assembly into a standalone Servo.
Is this something that's possible? If so, our company would use about 500 of them (!)