Based on Allegro?s A4988 microstepping bipolar stepper motor driver. The driver features adjustable current limiting, overcurrent and overtemperature protection, and five different microstep resolutions (down to 1/16-step). It operates from 8 ? 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling).
We recommend careful reading of the A4988 datasheet(righ side of this page) before using this product. This stepper motor driver lets you control one bipolar stepper motor at up to 2 A output current per coil.