5Pcs A4988 StepStick Stepper Motor Driver Module plus Heat Sink for 3D Printer RepRap

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 Warning: ?Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver.(More generally, rewiring anything while it is powered is asking for trouble.) Package Include: 5x A4988 Stepper Motor Driver Module Only the above package content, other products are not included.