Pololu A4988 Stepper Motor Driver Carrier

This breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and five different microstep resolutions (down to 1/16-step). It operates from 8 V to 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). This board ships with 0.1″ male header pins included but not soldered in.

Overview

This product is a carrier board or breakout board for Allegro’s A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection; 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 (see the Power Dissipation Considerations section below for more information). Here are some of the driver’s key features:

•     Simple step and direction control interface
•     Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step
•     Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
•     Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
•     Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection
•     Short-to-ground and shorted-load protection