The ULN2003 Stepper Motor Driver Module is a compact and efficient driver board designed to control unipolar stepper motors with precision and ease. Built around the ULN2003 Darlington transistor array, it provides reliable current amplification for smooth motor operation. Ideal for Arduino, Raspberry Pi, and other microcontrollers, this module is commonly used with the 28BYJ-48 5 V stepper motor for robotics, automation, and motion control projects.
Technical Specifications
Core Specifications
Operating voltage: 5 V DC typical (supports 5 V logic)
Input control signals: 4-channel logic inputs (IN1–IN4)
Output current: up to 500 mA per channel
Driver type: ULN2003 Darlington transistor array
Compatible motors: Unipolar stepper motors such as 28BYJ-48
Electrical & Physical
Four input pins for step and direction control from a microcontroller
Standard 5-pin connector for direct connection to 28BYJ-48 motor
Power indicator LED and individual channel status LEDs
Module dimensions approximately 52 mm × 31 mm × 18 mm
Environmental
Operating temperature range: –20 °C to +85 °C
Stable performance for robotics and motion control applications
Why Choose the ULN2003 Driver Module
Dedicated driver for popular 28BYJ-48 stepper motors
Built-in indicator LEDs simplify debugging and testing
Easy integration with Arduino, Raspberry Pi, and other development boards
Critical Uses
Robotic arm movement and precision positioning
Automated camera sliders and pan/tilt mechanisms
CNC projects requiring fine step control
DIY motion control and automation systems
Pro Tips
Provide a stable 5 V supply to ensure accurate stepper motor performance
Sequence IN1–IN4 signals correctly for smooth motor operation
Avoid exceeding the rated current per channel to prevent overheating
Package Includes
1 × ULN2003 Stepper Motor Driver Module