Many of the parts were printed with my printer. My ballbot is coming along nicely 
I’m running the robot off a raspberry Pi and Ardunio Uno. I have two shift registers to control the 3 stepper motors. Dunno if it’s going to work yet?
I realized that I have no data sheet for my stepper drivers 
I used an old cigarette-lighter-charger form my car to power the 12 to 5 Volts for my arduino and raspberry PI. The idea is to have the Raspberry PI running of a 12V motorcycle battery and power the arduino plus the stepper drivers. I have not yet tested the amps but it should power it long enough to have some phun with it.
When powering something of battery power, every little amp counts. I’ll start optimizing after I got the stepper to work.
For now, I got it running off a power supply I borrowed from an every-ready lithium battery charger.

