The 28BYJ-48 is a small, cheap, 5 volt geared stepping motor.
These stepping motors are widely used to control things like automated
blinds, A/C units and are mass produced.
Due to the gear reduction ratio of *approximately* 64:1 it offers decent
torque for its size at speeds of about 15 rotations per minute (RPM).
Software can be used to accelerate gradually and a higher voltage power
source e.g. with 12 volts DC one can get about 25+ RPM.
These little steppers can be purchased together with a small breakout
board for the Arduino compatible ULN2003 stepper motor driver.
The low cost and small size makes the 28BYJ-48 an ideal option for small
robotic applications, and an excellent introduction to stepper motor
control with Arduino.
Specifications:
Motor Type:Unipolar stepper motor
Connection Type:Wire Connection (to the motor controller)
Voltage:5-12 Volts DC
Frequency:100 Hz
Step mode:Half-step mode recommended (8 step control signal sequence)
Half-step mode: 8 step control signal sequence (recommended) 5.625
degrees per step / 64 steps per one revolution of the internal motor
shaft.
Full Step mode: 4 step control signal sequence 11.25 degrees per step /
32 steps per one revolution of the internal motor shaft
Gear ratio:Manufacturer specifies 64:1.
Wiring to the ULN2003 controller A (Blue), B (Pink), C (Yellow), D
(Orange), E (Red, Mid-Point)
Weight: 30g
*Delivery outside Nairobi possible on request.
