The Adafruit A4988 Stepper Motor Driver Breakout simplifies stepper motor control down to just two pins — a direction pin and a step pin. Each pulse on the step pin advances the motor by one step or microstep, making it straightforward to achieve precise, controlled motion without complex timer or PWM setups.

Built around the Allegro A4988 driver IC, this breakout supports motor voltages from 8V to 35V DC and logic levels from 3V to 5V, making it compatible with Arduino, ESP32, Raspberry Pi and other popular microcontrollers. The board features terminal blocks for easy motor and power wiring, and a 2 oz copper PCB for improved current handling and heat dissipation.

Key Features

• Two-Pin Control – DIR sets rotation direction, STEP advances one step/microstep per pulse
• Microstepping – Default 1/16 microstep mode, adjustable to full step, 1/2, 1/4 or 1/8 via MS1/MS2/MS3 pins
• Adjustable Current Limit – Up to 2A via on-board potentiometer (heatsink recommended for high-current use)
• Wide Motor Voltage Range – 8–35V DC input for stepper motors
• 3–5V Logic Compatible – Works with Arduino, ESP32, Raspberry Pi and more
• LED Indicators – Red and green LEDs show direction, yellow LED indicates step pulses
• Overcurrent Protection – Built into the A4988 driver IC
• Terminal Blocks – Screw terminals for motor and power connections
• Control Lines – Sleep, Reset and Enable pins for power management
• 22 µF 50V Capacitor – On-board capacitor for motor power stability
• Four Mounting Holes – For secure mechanical attachment

Ideal For

• CNC machines and 3D printers
• Robotics with precise positioning
• Camera sliders and pan/tilt systems
• Any application requiring controlled stepper motor movement

Package Contents

• 1× Adafruit A4988 Stepper Motor Driver Breakout Board
• 1× Header strip