A4988 Reprap Stepper Motor Driver

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Detail A4988 Reprap Stepper Motor Driver

Features and Benefits
Low R DS (ON) outputs
Automatic current decay mode detection / selection
Mixed with the slow current decay mode
Synchronous rectification for low power dissipation
Internal UVLO
Crossover-current protection
3.3 and 5 V compatible logic supply
Thermal shutdown circuitry
Ground short-circuit protection
Load short-circuit protection
Five optional stepping modes: full, 1 / 2,1 / 4,1 / 8 and 1/16

This breakout board for Allegros 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 soldered in.