ULN2003 Stepper Motor Driver Board

This ULN2003 interface board allows you to easily drive a unipolar stepper motor (such as the popular 28BYJ-48) from a microcontroller like an Arduino, ESP32, or any standard TTL logic circuit.

The ULN2003 integrated circuit features seven high-gain Darlington array pairs, capable of handling up to 500 mA per channel, making this board perfect for low-power stepper motor applications requiring simple control.

Specifications

• Integrated Circuit: ULN2003A (Darlington Arrays)
• Logic Compatibility: TTL/CMOS 5V
• Motor Supply Voltage: 5 V to 12 V DC
• Supported Motor Type: Unipolar 4-phase (5-wire or 6-wire)
• Connectors: Terminal blocks for motor power and signal input
• Dimensions: Approx. 31 mm x 35 mm

A built-in flyback diode protects the circuit from voltage spikes induced by the motor's inductance.