1.Photosensitive resistance module has the most sensitive ambient light, generally used for detecting environment immediate of the brightness of the module light, trigger SMC or relay, etc.

2 Brightness of ambient light module can not reach the threshold of setting, DO exit end of high-level, when light brightness of the external environment of the development of threshold, only to stop output low level.

3 Output port can be directly connects to the single-chip microcomputer, through the single-chip microcomputer for detecting level up and down, so the change in intensity of the light of the test environment.

4 End of output can directly drive the relay module, which can form a light switch – operated.

5.1 VCC positive power 3.3 – 5V supply.

6.2 GND power is negative.

7.3 exit switching TTL signal DO.