control the motor rotation and listen on the ‘stepper motor driver’ interface pins hooked up to the motion controller upstream. The Arduino source for this can be found on the project GitHub.

I build robots that move, blink, and sometimes even creep you out. From animatronics to 3D printing experiments, I fuse ...

But [Playful Technology] wanted to control the hands with an Arduino ... the drive mechanism with something like an RC servo or other motor and it sounds like he has done this and plans to show ...