I need digitally controlled potentiometers but I want real pots and not a digital potentiometer chip because I want to integrate this with conventional relatively high voltage circuits like those you might find in a guitar amp.
My current idea is to mate a Rotary Position Sensor with a Servo:
The Murata SV01 Rotary Postion Sensor costs $0.95 USD and it's basically just a potentiometer with a D shaped hole instead of a shaft:
A cheap micro servo costs $3.50 USD:
I don't want a motorized pot because they're huge and expensive by comparison and I don't need a shaft. And the servo is easily controlled using a PWM output of a microcontroller.
So the question is, is this feasible? I'm not an engineer but I'm just concerned with coupling the two devices, accuracy, control, robustness, etc.
If you think it is feasible, can you recommend where I might obtain the necessary hardware to mate the knurled plastic shaft of the servo with the 4mm D shaped hole. I was thinking a mini-PCB could serve as a base with screw holes for the servo mounts and something to solder the Rotary Postion Sensor to.