Hey all i am trying to find a way in order to turn an car amp's bass level knob left and right using an arduino's Digital PWM pin. I am thinking that a stepper motor would be the correct motor to use in order to do this or no?

Also, would there be a better fitting motor to do what i am looking to do without much needed modifications to the bass level knob in order to attach it to the motor to turn it?

The bass knob looks like this:

Any insight would be great!

 

Probably the easiest way to do this would be to use a typical RC Servo. They have gear reduction to give a bit if extra torque, and adjust to a particular position based on the pulse width on the control input. Google RC Servos for more info. I think there may even be a servo library in the standard Arduino IDE.