Adding an analog feedback tap to a 9g Micro Servo

[freemansoft]

Internally the servo has a feedback loop that is driven off of a variable resistor. The resistance value changes as the servo sweeps across its range of motion. This can act as a proxy for the servo's position. You can buy servos with an extra wire that exposes the voltage across that variable resistor or you can make your own. Or, you can add your own sensing wire to the potentiometer.

Adding an analog feedback tap to 9g micro servos

(https://youtu.be/dZ3Cnj2dLyI)[Video walkthrough]

People's posts helped me. I hope these help someone else.