Modify unipolar stepper motor to bipolar
I followed a blog article on how to modify this unipolar stepper to be bipolar, because BeagleBone Blue has built-in H-bridges.
Cut the trace in the middle
I used an EduMIP, which has DC motors on M2 and M3, so I grabbed M1 and M4.
I used a wiring housing to line up the wires to the stepper motor header.
- center-tap (unused): Red (5)
Wire M1 to pins 2/4, M4to pins 3/1
Find M1 and M4 next to where the EduMIP motors connect
git clone https://gist.github.com/jadonk/1da9f20423c2e6c8a954eca1a3e8f7f2