Or an accessory ? Mounts on Servo?

Come on Jerimie? A special servo wheel with a hall sensor, maybe? An auxiliary pot for ADC port feedback?

(Nice how I try to simplify something not so simple.)

Open the servo and solder a wire to the wiper pin of the pot (making a 4th wire)... Connect the wire to an adc port... Done, instant feedback...

RR

is there any tutorial for this ?

@Nomad,

http://forums.trossenrobotics.com/tutorials/how-to-diy-128/get-position-feedback-from-a-standard-hobby-servo-3279/

https://youtu.be/w7qRs6tvxlM

Hard to find good video footage, but i hope that helps, hopefully you find a better video. Nothing worse when someone is holding a camera with one hand and shaking it around everywhere. :)

thank you tomy