VERTER is capable of taking battery voltages from 3-12VDC and then output a handy 5V DC power supply, ... The 5.2V is safe for all 5V-powered electronics like Arduino, Raspberry Pi, ...

So long as the 0V rail is connected to the Arduino 0V rail, the positive rail can be any dc voltage – more or less that the Arduino, so great for 12V motors. And it is compatible with both 5V and 3V ...

[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… ...