A4988 Stepper Motor Driver with Heat Sink

The A4988 drives one bipolar stepper motor with up to 1/16 microstepping for smooth, quiet motion. Two pins — STEP and DIR — control it, and a trimmer sets the current limit to protect your motor. It plugs into RAMPS, CNC Shield V3 and many 3D printer boards.

Key features

• Up to 1/16 microstepping
• Adjustable current limit, up to ≈ 1 A without cooling (2 A with heat sink and airflow)
• Simple STEP/DIR interface
• Thermal, over-current and short-circuit protection

Specifications

What's in the box

• 1 × A4988 driver
• 1 × heat sink

Ideal for

• 3D printers (RAMPS)
• CNC machines (CNC Shield V3)
• Camera sliders

Good to know

• Set the current limit before connecting a motor.
• PCB colour (red or green) varies by batch.