[Dan] salvaged some parts from an old printer a while back as well as lastly discovered a long time to play with them. one of the things he was many thinking about is the geared stepper motor seen above. He was able to get it running with an Arduino in no time so he chose to take the job a bit bit further. What he ended up with is a stepper motor chauffeur which can be managed over Bluetooth.
The motor can’t be driven directly, however with a easy motor chauffeur like the L293 chip [Dan] utilized it’s not difficult to interface them with your manage hardware of choice. From there he added an ATtiny85 which will take care of the stepping protocol required to relocation the motor. The Bluetooth module he’s utilizing functions as a serial device, making it truly easy to interface with the uC. [Dan] utilizes a pin header to link the module, so changing to a different type of serial gadget in the future will be quick as well as painless.
After the break you can see him sending step commands to the chauffeur board.