The A4988 stepper motor driver carrier is a breakout board for 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). 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 Comes complete with self adhesive heat sink. Technical Specifications Minimum operating voltage: 8 V Maximum operating voltage: 35 V Continuous current per phase: 1 A Maximum current per phase: 2 A Minimum logic voltage: 3 V Maximum logic voltage: 5.5 V Microstep resolutions: 1, 1/2, 1/4, 1/8, 1/16 Size: 0.6″ × 0.8″ Weight: 1.3 g
