28BYJ-48-5V Stepper Motor and Driver Board ULN2003

Product Description

This popular and affordable kit pairs the robust 28BYJ-48 5V stepper motor with the necessary ULN2003 driver board, providing everything you need to implement precise, incremental motion control in your projects. It is an extremely common choice for beginners and hobbyists working with Arduino, Raspberry Pi, and other microcontrollers.

The 28BYJ-48 is a permanent magnet stepper motor with a 5V operating voltage. It is a 4-phase, 5-wire motor known for its reliability and excellent value. The accompanying ULN2003 driver board utilizes a ULN2003 Darlington array chip, which is required to handle the current demands of the motor, as microcontrollers cannot directly power it. Together, they form a simple, effective, and precise motion control solution.

Key Features and Specifications

• Motor Type: 28BYJ-48 (5-wire, 4-phase stepper motor)
• Driver IC: ULN2003 Darlington Transistor Array
• Operating Voltage: 5V DC (for both motor and driver logic)
• Step Angle: 5.625° / 64 (meaning 64 steps for a single physical step of 5.625 degrees)
• Gear Reduction Ratio: 1/64 (resulting in very fine resolution of approximately 4096 steps per full 360-degree rotation)
• Torque: Decent torque for its size (approx. 300 gf-cm @ 4.8V)
• Interfaces:
  • Motor has a convenient 5-pin connector that plugs directly into the driver board.
  • Driver board includes easily accessible input pins for connecting to microcontroller GPIO pins.
  • LED indicators on the driver board show the active phase sequencing.

Potential Applications

The precision and control offered by this kit make it suitable for various small-scale automated projects:

• Automated Valves/Flow Control: Opening and closing small water valves in simple irrigation systems.
• Camera Gimbals/Pan-Tilt: Creating precise, motorized mounts for small cameras or sensors.
• Small Robotic Actuators: Providing controlled rotation in miniature robots or animatronics.
• DIY Clocks/Timers: Building custom analog display mechanisms that require precise turning.
• Laboratory Automation: Driving small pumps or mixing mechanisms in hobbyist lab equipment.