"The stepstick DRV8825 is a breakout board based on Texas Instruments DRV8825 stepper motor controller. You can use this board to act as interface between your microcontroller and stepper motor. The DRV8825 is able to deliver up to 2.5A and can be controlled with a simple step/direction interface. The controller has a Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step and protective features for over-current, short circuit and over-temperature.
Using the trimpot on the board you can easily turn the current up or down. Turn left to lower the current, right to output a higher current
StepStick DRV8825 Stepper Motor Driver With Heat Sink for RepRap, 3D Printers, CNC and applications"