[Frank Herrmann] had an interesting idea to turn a geared DC motor ... listen on the ‘stepper motor driver’ interface pins hooked up to the motion controller upstream. The Arduino source ...

grbl is stepper motor controller firmware for three-axis cnc machines ... that are too powerful for the normal drivers included on grbl Arduino shields (or integrated Arduino+drivers equivalents), and ...

So he decided to replace the stepper motor controller in his turntable and document ... You’ve also got to solder wires coming from the original DC jack and power switch to the new board to ...

Permanent magnet dc motors need a chunky inductor ... engineering was to do two things: get this controller and motor running again, and then add an electrically-safe interface to allow remote control ...