Here is our first and low priced product:
Main features:
CONTROL UNIT
Supply: 6 pieces 1,5V AA type batteries.
Manual gear-turn limit setting.
Manual control function with damped focusing hand-knob.
5 programmable fixed focus positions.
Speed limit setting.
Battery low voltage...
Ones I made this rod support, camera bracket, DOF adapter.
Well, it was fast job with no Swiss watch tolerance. Anyway, it was
good enough to make first experiments with my follow focus prototypes.