This product is a carrier board or breakout board for TI"s DRV8825 stepper motor driver. Please read the DRV8825 datasheet (1MB PDF) carefully before using this product. This stepper motor driver allows you to drive a bipolar stepper motor with up to 2. Control 2A output current per coil (see Power Loss section below for more information). Here are some of the key features of the driver: Easy step and direction control Six different step resolutions: full step, half step, 1/4 step, 1/8 -Step, 1/16-step Adjustable current control allows you to adjust the maximum current output with a potentiometer that allows you to use voltages above your stepper motor's rated voltage to achieve higher step rates