Motor Type: Unipolar stepper motor
Step Angle: 5.625° / 64 (internally geared) → 2048 steps per revolution of output shaft
Rated Voltage: 5 V DC (common)
Operating Voltage Range: 5 V – 12 V (depending on variant)
Number of Phases: 4
Gear Ratio: 1:64 (reduction gearbox)
Shaft: Round, ~6 mm diameter, 1 flat side
Holding Torque: ~34 N·cm (~3.4 kg·cm)
Rated Current per Phase: ~50 mA at 5 V
Connector: 5-wire cable (unipolar)
Dimensions: ~28 mm × 28 mm × 37 mm (motor body)
Weight: ~40 g
Gear Material: Plastic (most common)
Rotation Direction: Can rotate clockwise or counterclockwise
Operating Temperature: −10 °C to +50 °C
Applications: Small robotics, precision positioning, low-power stepper projects
28BYJ-48 Stepper Motor
The 28BYJ-48 is a low-cost, five-wire, unipolar stepper motor that uses a built-in gear reduction of approximately 64:1 to achieve precise movement for applications like automatic vents and small robotics. It operates on 5V, has four coils, and is typically used with a ULN2003 driver board. The motor has 2048 steps per revolution and its specifications include a 5.625° step angle before reduction and a rated current of around 500 mA.
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