KY-040 360 Degree Rotary Encoder Module for Arduino
ROTORY ENCODER is a device used for knowing the axial movement and its direction. KY-040 Rotary Encoder Sensor Module Brick Sensor is a rotary input device (as in knob) that provides an indication of how much the knob has been rotated and what direction it is rotating in. It’s a great device for stepper and servo motor control. You could also use it to control devices like digital potentiometers.

M274 360 rotary Degree encoder, is an incremental electro-mechanical device that converts the angular position or motion of a shaft or axle to digital code. The output of incremental encoders provides information about the motion of the shaft, which is typically further processed in processor / controllers into information such as speed, distance, and position.

Specifications and Features :
Model : KY-040.
Type : Incremental Encoder.
Cycles per revolution (CPR) : 20.
Working voltage : 0 – 5V.
Material : PCB + Brass.
Weight : 10 gm.
Size : 32 x 19 x 30 mm.
Package Includes :
1 x 360 Degree Rotary Encoder

Applications:
Security systems.
Motors
Robotic arms
Vending machines.
Industrial machines.
Engineering systems.
Measuring instruments.
Hobby projects.
Systems where systematic change INPUT device is needed like CROs, signal generator etc.