I'm gonna build a mini robot (L60xW30xH30 mm)
But I need a way to see how long the robot's wheels have gone...
The robot will have a sort of caterpillar-track on each side (small rubber-band)..
So no space for a encoder wheel (opto-coupler i think ?)
But Can i maybe use a small potentiometer ? then using ADC to get direction and speed ?
Or what options can you guys think off here ?
(the image is just from google, but shows my concept)