The 28BYJ-48 is a 5V unipolar stepper motor that comes with an internal gear reduction system. While it moves slower than a standard motor, the 1:64 gear ratio gives it enough power to lift small weights or turn heavy mechanisms with ease. It is a 4-phase motor, making it extremely easy to control using the standard Arduino Stepper.h library or the popular ULN2003 driver board.
Key Features
Geared Precision: 1:64 reduction ratio provides high holding torque and precise positioning.
5V Operation: Designed to run directly from your Arduino or Raspberry Pi’s 5V power rail (using a driver).
4-Phase / 5-Wire: Simple wiring and wide library support for beginners.
Quiet & Stable: Smooth operation with minimal vibration compared to larger NEMA motors.
Standard Connection: Features a 5-pin XH-2.54 connector for plug-and-play use with ULN2003 driver boards.
Technical Specifications
Feature
Specification
Model
28BYJ-48 (5V Variant)
Rated Voltage
5V DC
Number of Phases
4 Phases (5 Wires)
Gear Reduction Ratio
1 / 64
Stride Angle
5.625° / 64
DC Resistance
50Ω ± 7% (at 25°C)
Pull-in Torque
> 300 gf.cm (at 100Hz)
Noise Level
< 35dB
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