This expansion board as a driver expansion board, can be used for engraving machines, 3D printers, CNC. It is a total of four slots, can drive four A4988 stepper motor. Each road stepper motors only need two IO ports. In other words, six IO ports can be well managed three stepper motors. Very convenient to use. UNO for Arduino module IO port correspondence introduction.

The drive module can directly drive four DC motors, drive the car chassis is 4WD 4 choice .Driving battery big up to 1A generally smart car motor current 100-300MA only four are sufficient to meet the control requirements .While leaving Road stepper motor interface can drive Road five line four-phase stepper motor or Road, two-phase four-wire stepper motor, very suitable for precise control requirements.

Nema 17 is the motor of choice for RepRaps/3D printers/ Desktop CNC Routers. It is also a suitable motor for various robotics applications. This motor is the most preferred motor used by the rep rap community. Specifications – Step Angle – 1.8 deg Current – 1 A Resistance – 2.4 ohms Inductance – 6.5 mH Holding Torque – 4.4 kgcm Voltage – 2.4v Weight – 350 grams No of Leads – 4.

A4988 is a complete microstepping motor driver with built-in translator for easy operation. This product is available in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A. HR4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modes. A4988 converter is the key to the easy implementation. As long as the “step” input inputting one pulse drives the motor one microstep.