ULN2003 Unipolar Stepper Motor Driver Module

The ULN2003 Stepper Motor Driver Module is a compact, highly popular electronic board designed to bridge low-power microcontrollers (like Arduino, ESP32, or Raspberry Pi) with higher-current unipolar stepper motors.

Built around the ULN2003 Darlington transistor array chip, it amplifies weak logic signals to easily switch the internal coils of small 4-phase, 5-wire stepper motors, most notably the widely used 28BYJ-48 stepper motor.

Key Features
4-Phase LED Activity Indicators.
Keyed Motor Interface.
Microcontroller-Friendly Logic.
Integrated Circuit Protection.

Technical Specifications
Driver Chip: ULN2003A (High-Voltage, High-Current Darlington Transistor Array)
Operating Voltage: 5V to 12V DC
Output Current: Capable of handling up to 500mA per channel