28BYJ-48 Stepper Motor + ULN2003 Driver Board

The 28BYJ-48 Stepper Motor paired with the ULN2003 Driver Board is a staple in the world of DIY robotics and automation. Unlike standard DC motors, this stepper motor allows for precise control of angular position, making it perfect for applications where accuracy is paramount. The motor features a 4-phase, 5-wire configuration and an integrated 1/64 reduction gear set. This gearing significantly increases the output torque while allowing for extremely fine steps—approximately 4096 steps per revolution when using half-step mode. Since microcontrollers like the Arduino cannot provide the current necessary to drive the motor's coils, the included ULN2003 driver board acts as the essential bridge. It utilizes a high-voltage, high-current Darlington transistor array to amplify control signals. The board features four onboard LEDs that provide real-time visual feedback of the stepping sequence (IN1-IN4), which is invaluable for debugging and educational purposes. Wiring is simplified with a keyed JST connector that prevents incorrect orientation. The motor operates optimally at 5V DC, making it compatible with most standard logic levels. Typical projects range from automated window blinds and rotating camera platforms to HVAC vent controls and small-scale CNC experimentation. Its compact 28mm diameter allows it to fit into tight enclosures where larger NEMA motors cannot. What is in the box: - 1 x 28BYJ-48 5V Stepper Motor - 1 x ULN2003 Stepper Motor Driver Board (DIP or SMD version)