A 360 Degree Rotary Encoder is a Bread Board Friendly extremely precise module that provides an indication of how much the knob has been rotated AND what direction it is rotating in.
It is an incremental electro-mechanical device that converts the angular position or motion of a shaft or axle to digital code.
Incremental Encoder
Supply Voltage: 3-5V
Left/Right rotary output pulse, each circle with 20 pulse