28BYJ-48 Stepper Motor and ULN2003 Stepper Motor Driver
This 5V DC 28BYJ-48 Stepper Motor is small, inexpensive and high-quality geared step motor. The 28BYJ-48 Stepper Motor and ULN2003 Stepper Motor Driver is a widely popular combination of the stepper motor and stepper driver, because of the stability and reliability of the system.
The motor has a reduction ratio of 64:1, so it offers a decent torque for its size at speeds of about 15 RPM. It is a unipolar stepper motor which has 5-wires.
As stated before the pack contains ULN2003 Stepper Motor Driver which is a Mini Stepper Motor Driver. The main purpose of ULN2003 is to amplify the control signals from the Arduino, so as to drive the 28BYJ-48 Stepper Motor.
If you will give the ULN2003 stepper driver a certain pulse signal, it will drive step motor to a certain angle. The control of Stepper Motor movement angle is done by controlling the number of stepper motor driver pulses. The speed of the stepper motor rotation is also controllable by controlling the frequency of the pulses.
Rated voltage supply: +5V
No of phase: 4
Stride angle: 5.625°/64
Speed variation ratio: 1/64
Pull-in torque: 300 gf.cm
Friction torque: 600-1200 gf.cm
Self-positioning torque: >34.3mN.m
In-traction torque: >34.3mN.m (120Hz)
DC resistance: 50Ω±7% (25°C)
Insulated resistance: >10MΩ (500V)
Insulated power: 600VAC/1mA/1s