The A4988 Stepper Motor Driver is a microstepping motor controller capable of driving bipolar stepper motors up to 2A per coil with 1/16 microstepping resolution. Designed for Arduino, RAMPS, and CNC applications, it supports 8V–35V motor voltage and includes current limiting, over-temp, and short-circuit protection—perfect for 3D printers, CNC routers, and robotics projects.

• its supply voltage is 8 to 35V DC.
• it has 1A current without a heatsink.
• it gives 2 A current with the heat sink.
• 3 to 5.5V is logical input.