Trinamic provides some of the smartest stepper motor drivers on the market, and since the German hacker store Watterott released their SilentStepStick breakout boards for the TMC2100 and TMC2130 ...

The SonaSPEED stepper motor helps control the fuel-mixture ratio in the actuator assembly of the GSLV-F16, which mixes liquid hydrogen and oxygen to fire the cryogenic engine for the rocket's ...