It is perfect for 3D printing, CNC, Makeblock Music Robot as well as a lot of other applications where it's necessary to control precise movement.
The A4988 is a complete microstepping motor driver with built-in translator for easy operation. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes. Plus, we add a on-board DIP Switch and a on-board potentimeter, so you can change step modes and the current of motor easily.