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This Raspberry Pi-based robot’s motors are driven with a TB6612FNG motor driver carrier.
In this video, Meindert Norg from Norg Consulting demonstrates his active magnetic bearing, Tripod Floater. The closed-loop system uses three Pololu 18v15 high-power motor drivers as PWM amplifiers to power the magnetic coils that keep the module floating beneath the metal plate.
February, 2010 update: the Tripod Floater is now wireless:
Customer Mark Goodson constructed this spooky animatronic skeleton using the Jrk USB Motor Controller. See the final result below: