[Frank Herrmann] had an interesting idea to turn a geared DC motor into a servo motor assembly, but with a stepper motor-like interface. By stacking some small PCBs behind the motor body, it was po… ...

The Arduino & Raspberry PI Compatible DC Crank Set is a little board that allows for you to half wave rectify the AC power coming from a 12v DC Crank dynamo generator, into usable DC power.