HALJIA 5PCS A4988 Stepstick Stepper Motor Driver Module + Heat Sink Compatible with 3d Printer Reprap

A4988 driver board widely used in 3D printers and small CNC machines Simple step and direction control interface Thermal protection, over-current protection, ground fault protection 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 Features:1.Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)2.Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection3.Automatic current decay mode detection/selection4.Internal UVLO5.Mixed with slow current decay modes6.Synchronous rectification for low power dissipation7.Crossover-current protection8.Thermal shutdown circuitry9.3.3 and 5 V compatible logic supply10.Thermal shutdown circuitry11.Ground Fault Circuit12.short-circuit protection13.five optional step mode: full, 1/2, 1/4, 1/8 and 1/16Packing List:5*A4988 StepStick Stepper Motor Diver Module5*Heat Sink