Stepstick A4988 Stepper Driver Module is a breakout board microstepping driver with translator and overcurrent protection. This stepper motor driver controls one bipolar stepper motor at up to 2 A output current per coil ie, in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and 2 A. Adjustable current control allows to set the maximum current output with a potentiometer, hence can use voltages above your stepper motor’s rated voltage to achieve higher step rates. The A4988 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened. One pulse on the STEP input can drive the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program.