4-Phase 5-Wire Reduction Stepper Motor and ULN2003 Driver Combo
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৳ 200.00৳ 230.00 (-13%)
The 28BYJ-48 5V Stepper Motor and ULN2003 Driver Board Kit is a highly popular, low-cost precision motion control system designed for microcontroller prototyping [context]. The 4-phase, 5-wire stepper motor operates on a 5V DC supply and utilizes an internal 64:1 reduction gear train to multiply rotational torque, enabling smooth and highly precise angular positioning. The companion driver board is built around a rugged ULN2003 Darlington transistor array chip, featuring an easy plug-and-play motor connection header, isolated logic input pins (IN1-IN7), and a row of four onboard LEDs to provide immediate visual tracking of the active step sequence—making it an essential kit for Arduino robotic arms, automatic blinds, and camera sliders.
Product Overview
The 28BYJ-48 5V Stepper Motor and ULN2003 Driver Board Kit is a highly efficient, low-cost precision motion control system designed for seamless integration with microcontrollers [context]. This kit combines a 4-phase, 5-wire unipolar stepper motor with a matched Darlington transistor driver module. Operating on a stable 5V DC power architecture, this setup allows development platforms like Arduino or Raspberry Pi to replace high-speed uncontrolled spinning with precise step-by-step angular positioning, making it an essential building block for custom automated mechanisms and robotics.
Advanced Motor Mechanics & Planetary Gearing
The 28BYJ-48 stepper motor stands out for its high rotational holding torque relative to its compact, low-profile form factor:
- Internal Reduction Gear Train: Hidden inside the sealed metallic motor drum is an internal reduction gear train with a ratio of approximately 64:1. This gearing configuration divides down the raw internal motor steps while multiplying the final torque output, allowing the shaft to hold heavy loads steadily without slipping.
- Precise Step Resolution: When driven using full 4-step sequences, the output shaft delivers 2048 distinct steps per full 360° revolution. Switching to an advanced 8-step half-stepping sequence increases resolution to 4096 individual steps per turn, enabling sub-degree positioning precision.
- Flatted D-Shaft Output: The brass output shaft is machined with dual flat faces (D-shaft style). This physical profile guarantees that mounted gears, pulleys, or wheel couplers clamp down securely without spinning loose under high-torque starts.
- Flexible 5-Wire Harness: The motor is pre-wired with a flexible, color-coded internal coil wiring harness terminating in a key-shrouded 5-pin JST connector, preventing accidental reverse-polarity installation.
Smart ULN2003 Driver Circuitry
Because microcontrollers cannot supply enough raw current from their GPIO pins to drive motor coils directly, the included driver board safely acts as a heavy-duty power bridge:
- Rugged ULN2003 Darlington Array: The circuit board centers around a robust ULN2003 high-current transistor IC housed in a convenient dual-inline package (DIP) socket. This chip easily sinks up to 500mA per channel, absorbing electrical flyback energy through internal clamping diodes to protect your sensitive Arduino or Raspberry Pi.
- 4-Phase LED Diagnostic Array: Features a row of four bright surface-mount LEDs labeled A, B, C, and D. These provide immediate visual diagnostic tracking by illuminating in real-time sequence with the active motor coils, making programming and step-timing debugging straightforward.
- Isolated Logic & Power Rails: The board breaks out standard 2.54mm control pins (
IN1throughIN7) to receive low-power logic pulses from your controller, while drawing raw motor current from an isolated 5V–12V power supply block. A removable jumper pin allows you to completely isolate or bridge the logic power lines instantly.
Common Field Applications
- Automated Blinds & Curtains: Building custom smart-home window actuators that rotate panels to precise angles based on ambient sunlight sensors.
- Articulated Robotic Arms: Driving multi-axis joint movements on desktop robot arms and automated sorting grippers.
- Pan-and-Tilt Camera Mounts: Crafting ultra-smooth, slow-motion panoramic camera sliders and automated surveillance tracking mounts.
- HVAC Louver Controls: Replacing broken internal air-vent directional flaps in custom climate-control or automotive venting systems.
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