Keyestudio A4988 Reprap Stepper Motor Drive Board for 3D Printer (BLACK)

Descriptions: 
This stepper motor driver is powered by A4988, a DMOS microstep driver with converter and over-current protection.

Features at a glance: 
- It is available in full, half, 1/4, 1/8, and 1/16 stepping modes to operate bipolar stepper motors with output drive performance up to 35V and /- 2A
- Including a fixed turn-off time current regulator that operates in slow or mixed decay mode, the converter is the key to easy implementation
- The A4988 interface is ideal for complex microprocessors that are not available or overloaded, with only a simple step and direction control interface
- Adjustable potentiometer can adjust the maximum current output to improve the stepping speed, with automatic current decay mode detection