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This product is a carrier board or breakout board for Allegro's A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection by Pololu; we therefore recommend careful reading of the A4988 datasheet before using this product. This stepper motor driver lets you control one bipolar stepper motor at up to 2 A output current per coil.

Features:
Short-to-ground and shorted-load protection
Adjustable current control
Intelligent chopping control
Over-temperature thermal shutdown
Under-voltage lockout
Crossover-current protection
Simple step and direction control interface
Full-step, Half-step, Quarter-step, Eighth-step, and Sixteenth-step
Rs ohm 0.2

Setting the driving voltage:

Amper of motor x 0.7 x 8 x Rs ohm = V
An example
Nema 17 motor 1.2A x 0.7 x8 x Stepper Driver A4988 (0.2 Rs ohm) = 1.344V