Description:
Type: A4988  Stepper Motor Driver Module
Output Drive Capacity: Up to 35V and +/- 2A
Compatible Logic Supply: 3.3V, 5V
5 Optional Subdivision: Full, 1/2, 1/4, 1/8 and 1/16
Crossover-Current Protection: YES
Overheat Shutdown Circuit Protection: YES
Ground Connection Short-Circuit Protection: YES
Load Short-Circuit Protection: YES
Crossover-Current protection: YES

Feature:
Low RDS (open) output;
Automatically current decay mode test / select;
Mixed slow current decay mode;
Synchronous Rectification for low power dissipation;

Applications:
Need to drive stepper motors.
It is to build a 3d printer, CNC, engraving machine and other essential modules.