It’s a simple enough set-up in which a voltage controlled current source feeds the pot while an Arduino with a motor controller turns it through a stepper motor, and takes a voltage reading from ...

Modifying the PCB and potentiometer went well enough, but the trouble came when [Haris] actually tried to turn the thing. Attaching the servo directly to the axle worked, but it made turning the ...

For this example, let's control the movement of a servo—that is, start and stop the servo and control its speed and rotation. Three wires protrude out of the servo: control (white/yellow), power (red) ...