EC11 Rotary Encoder Module With Knob Cap

Description :

An incremental encoder is a rotary sensor that converts rotational displacement into a series of digital pulse signals. These pulses are used to control angular displacement.

In the Eltra encoder, the conversion of angular displacement adopts the principle of photoelectric scanning. The reading system is based on the rotation of a radial grating (code disk) composed of alternating transparent and opaque windows. At the same time, it is illuminated by an infrared light source. The light projects the image of the code disk onto the surface of the receiver.

The receiver is covered with a grating that has the same window width as the code disk. The receiver works by sensing changes in light caused by the rotation of the disk, converting the light changes into corresponding electrical signals. The signals are then amplified to a high level and generate square-wave pulses without interference. These must be processed by electronic circuits.

The reading system usually adopts a differential method, comparing two signals with the same waveform but a 180° phase difference to improve output signal quality and stability. The reading is formed based on the difference between the two signals, thereby eliminating interference.

Pin Description

5V: Power positive

GND: Power negative

S1: Signal output 1

S2: Signal output 2

KEY: Button

Product Parameters

Working voltage: 5V

Pulses per revolution: 20

Adjustment method: Rotary type

Size: Diameter 24mm

Applications

Car audio

Car air conditioner

Car navigation and others

Household appliances