Name: 28BYJ-48 5V Stepper Motor with ULN2003 Driver Board Kit for Arduino - UNIVERSAL CIRCUIT SYSTEM
SKU: UCS-0184
Price: 190.00 BDT
Availability: InStock

Product Overview

The 28BYJ-48 5V Stepper Motor and ULN2003 Driver Board Kit is an entry-level precision motion control system designed for microcontroller prototyping. This integrated combo pairs a 4-phase, 5-wire unipolar stepper motor with a matched Darlington transistor driver module. Operating on a 5V DC power architecture, this kit replaces simple high-speed spinning with step-by-step angular positioning. It serves as an accessible learning platform for students, makers, and engineers looking to master rotational automation, robotics, and precise orientation feedback.

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 (IN1 through IN4) 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.