ULN2003 Stepper Motor Driver Board – 5V 4-Phase for 28BYJ-48

ULN2003 Stepper Motor Driver Board

The ULN2003 stepper motor driver board is a compact, ready-to-use module for driving 5V unipolar stepper motors such as the popular 28BYJ-48. It features 4 phase indicator LEDs (A, B, C, D) for easy debugging, a standard JST connector for direct motor connection, and input pins (IN1–IN4) compatible with Arduino, Raspberry Pi, and other microcontrollers.

Key Features

• Based on ULN2003A Darlington transistor array IC
• Supports 5V unipolar stepper motors (e.g. 28BYJ-48)
• 4 onboard red LEDs (A/B/C/D) for phase indication
• IN1–IN4 control inputs — compatible with 3.3V and 5V logic
• JST connector for direct plug-in with 28BYJ-48 motor
• Separate power and signal connectors
• Compact PCB with mounting holes

Specifications

• IC: ULN2003A
• Operating Voltage: 5V
• Motor Type: 4-phase unipolar stepper
• Control Inputs: IN1, IN2, IN3, IN4
• Indicator LEDs: 4 (one per phase)
• PCB Color: Green

Compatible With

• Arduino (Uno, Nano, Mega)
• Raspberry Pi
• ESP8266 / ESP32
• Any 3.3V or 5V microcontroller