28BYJ-48 5V Stepper Motor with ULN2003 Driver Module for Arduino

28BYJ-48 5V Stepper Motor with ULN2003 Driver Module for Arduino

The 28BYJ-48 is one of the most popular low-cost stepper motors for hobbyist and educational projects. This combo includes the 28BYJ-48 geared stepper motor and the ULN2003 stepper driver board, making it a ready-to-use solution for precise rotational control with Arduino, ESP32, Raspberry Pi, and other microcontrollers.

Key Features

• Geared stepper motor: smooth, precise rotation with high torque for its size
• Step angle: 5.625° per step (64 steps per revolution × gear ratio = 2048 steps/rev in half-step mode)
• Operating voltage: 5V DC
• 4-phase, unipolar stepper motor
• Includes ULN2003 driver board with 4 input LEDs for visual step indication
• 5-pin JST connector — plugs directly into ULN2003 board
• On-board power and signal headers for easy Arduino wiring
• Gear reduction ratio: 1/64

28BYJ-48 Specifications

• Rated Voltage: 5V DC
• Phase Resistance: 20Ω ±10%
• Step Angle: 5.625° (half-step mode)
• Steps per Revolution: 2048 (half-step) / 512 (full-step) after gearing
• Reduction Ratio: 1/64 (approximately)
• Pull-in Torque: ≥300 gf·cm at 5V
• Insulation Resistance: >10MΩ

ULN2003 Driver Board

• Based on ULN2003A Darlington transistor array
• 4 control input pins: IN1, IN2, IN3, IN4 (connect to Arduino digital pins)
• 5V power input (can share Arduino 5V for light loads)
• 4 step indicator LEDs — flash in sequence as motor steps
• 5-pin JST socket for direct motor connection

Wiring to Arduino

• IN1 → Arduino D8 (or any digital pin)
• IN2 → Arduino D9
• IN3 → Arduino D10
• IN4 → Arduino D11
• VCC → 5V | GND → GND

Typical Applications

• Camera pan/tilt mechanisms
• Robotic arms and grippers
• Automated blinds and curtain openers
• Clock mechanisms and dial indicators
• 3D printer extruder feeders (light duty)
• Educational robotics and maker projects

Arduino Library

Use the built-in Arduino Stepper library or the popular AccelStepper library for smooth acceleration and deceleration control. Set steps per revolution to 2048 for half-step mode with the ULN2003 driver.