Tinylily arduino compatible wearable electronics collection tinycircuits asl2001 the tinycircuits tinylily wearable motor driver board uses the worlds smallest dc motor driver chip on a board that is only 141mm 0056 inches high based around the ti drv8837 h bridge motor driver ic this board is incredibly tiny at only 10mm in diameter yet can drive a 5v 18a motor the drv8837 is easy to use and interface to your favorite processor board such as a tinyduino tinylily or a standard ardui