Although the stepper claimed to have a 1:64 reduction gear, the actual ratio wasn’t that precise ([Rjeuch] estimates it as 1:63.876. The steps he took to fix this are worth a read. You can see a ...

Today in devices that use stepper motors to make beautiful music we present to you this Arduino-powered, Raspberry-Pi containing music box that uses simple stepper motors to grind out merry tunes ...