EC11 Rotary Encoder Module 20imp/rotation (electronic brick)

1. Working voltage: 5V

2. Number of pulses for one circle: 20

3. The rotary encoder can count the output pulse times by rotating positively and negatively. This counting method has no limitation, it can reset and return to the initial state if it matches the key on the encoder (that is, it will count from 0)

4. Working principle: The incremental encoder is a kind of rotary sensor which transforms the rotation displacement into a series of digital pulse signals. These pulses are used to control the angular displacement. In Eltra's encoder, the transformation of angular displacement adopts the photoelectric scanning principle. The reading system is based on the rotation of the radial dividing plate of the alternating light window and the non-light window, and it will be exposed to the infrared light source at the same time. The light will reflect the image of the plate on the surface of the receiver. The receiver is covered with a diffraction grating, and it has the same window width as the plate. The operation of the receiver is to detect the rotation change of the light plate, and then transform the light change into electrical change. Increase the low-level signal to high-level and generate a square pulse without any interference. This process needs circuit to process. The reading system generally adopts a differential method, that is, compare two different signals which have the same waveform bu the phase difference is 180 degrees in order to improve the quality and stability of the output signal. The reading is formed based on the difference between two signals, so it eliminates the interference.