Description

🔑 Key Features

✅ Compatible with 5V-12V Unipolar Stepper Motors (e.g., 28BYJ-48).
✅ ULN2003 Darlington Array – Drives up to 500mA per coil.
✅ Onboard LED Indicators – Shows coil activation status.
✅ 4-Phase Control – Supports full-step, half-step, and wave-drive modes.
✅ Easy Microcontroller Interface – Works with 5V/3.3V logic (Arduino, RPi, etc.).
✅ Built-in Flyback Diodes – Protects against back EMF.
✅ Compact & Breadboard-Friendly – Includes male headers for easy connections.

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📊 Technical Specifications

• Operating Voltage: 5V-12V DC (Motor power supply).

• Output Current: Up to 500mA per coil (ULN2003 limit).

• Compatible Motors: 5-wire/6-wire unipolar steppers (e.g., 28BYJ-48).

• Control Interface: 4 digital input pins (IN1-IN4).

• Step Modes: Full-step, half-step, wave drive (software-controlled).

• Dimensions: ~31mm × 35mm.

 

🔌 Wiring & Connections

1. Motor Connections

• Connect the 5-wire stepper motor to the 5-pin header (labeled).

• Red wire (common +V) → Center tap (if using 6-wire, check datasheet).

2. Power & Control

• +5V to +12V (Motor Power) → VCC & GND (External power supply).

• IN1, IN2, IN3, IN4 → Connect to MCU digital pins (e.g., Arduino D8-D11).

⚠ Note:

• If using 28BYJ-48 (5V motor), power with 5V.

• For higher torque, use 12V (if motor supports it).

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🛠 Applications

• 3D printer axis control (small extruders).

• Camera sliders & pan-tilt mechanisms.

• Robotic arm joints.

• Automated blinds & small CNC machines.

• DIY clock mechanisms.

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📦 Package Includes

• 1× ULN2003 Stepper Motor Driver Board.