Stepper MotorsCompatible
28BYJ-48 Stepper Motor + ULN2003
Small geared stepper motor and matching ULN2003 driver. Moves in precise steps – about 2048 per turn – for clocks, camera sliders, valves, dials and learning stepper control.
- Motor
- 28BYJ-48, 5 V, 4-phase unipolar
- Gear Ratio
- About 1:64
- Steps per Revolution
- About 2048 (full step) / 4096 (half step)
- Coil Resistance
- About 50 Ω
- Max Speed
- About 15 RPM
- Driver IC
- ULN2003
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Specifications
- Manufacturer Part Number
- 28BYJ-48
- Motor
- 28BYJ-48, 5 V, 4-phase unipolar
- Gear Ratio
- About 1:64
- Steps per Revolution
- About 2048 (full step) / 4096 (half step)
- Coil Resistance
- About 50 Ω
- Max Speed
- About 15 RPM
- Driver IC
- ULN2003
- Driver Supply
- 5–12 V
- Motor Diameter
- 28 mm
Downloads
Description
A stepper motor turns in exact steps, so you can move to a position without any sensor. The 28BYJ-48 has a built-in gearbox that makes it slow but strong for its size, and the ULN2003 board lets any microcontroller drive it with four pins.
Features
- 5 V, 4-phase unipolar stepper with about 1:64 gearbox
- About 2048 steps per output revolution (full step), 4096 in half-step mode
- ULN2003 Darlington driver board with 4 LEDs showing the active phase
- Driver inputs IN1–IN4, 5–12 V supply pins
- Plug-in 5-wire connector
Getting started
Connect IN1–IN4 to four digital pins and power the board from 5 V (not from the Arduino's 5 V pin if the motor makes the board reset). Use the built-in Stepper library with 2048 steps per revolution, or AccelStepper for smooth acceleration. Keep the speed below about 15 RPM.
Package includes
1 × 28BYJ-48 5 V stepper motor, 1 × ULN2003 driver board