A4988 driver board widely used in 3D printers and small CNC machines.
A4988 driver modules:20*15*11mm,Heat Sink: 9*9*5mm
3.3 and 5 V compatible logic supply.
Of five optional step mode: full, 1/2, 1/4, 1/8 and 1/16.
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay).