28BYJ-48 is a uni-polar 5V stepper motor that takes electrical signals as input and rotates by converting these input signals into the mechanical rotation. It consists of 4 stationary coils rated at +5V. These coils are known as a stator and make a ring around the rotor. It has a 1/64 reduction gear set and therefore moves in precise 512 steps per revolution. These motors are silent in comparison to other DC motors and servo motors. You can achieve positional control easily without needing extra circuitry and components.
Specifications
Key Features
Brand new and high quality.
Diameter: 27mm.
Voltage: 5V.
Step angle: 5.625 x 1/64.
Reduction ratio: 1/64.
Color: Silver
Item size: 31*27*19mm
Net weight: 35g
5 lines cable 4 phase stepper motor can be driven by ULN2003 chip.