The Me Stepper Motor Driver module is designed to precisely drive the bipolar stepper motor. When pulse signals are input into the stepper motor, it rotates step by step. For each pulse signal, it rotates a certain angle. This module features adjustable drive current and microstepping hardware adjustment. It can be used in 3D printing, numerical control, Makeblock music robot, precise motion control, etc. Its red ID means that it should be connected to the port with red ID on Makeblock Orion by RJ25 wire.