1、This electronic module is used for qualitative detection of ambient light intensity. 2、Control interface: a total of 3 pins (GND, VCC, SIG), GND is the ground, VCC is the power supply, and SIG is the signal output pin. 3、Photoresistor, the model is GM5528, the greater the surrounding light intensity, the smaller the resistance, otherwise the larger the resistance. 4、4pcs M2 screw positioning holes with an aperture of 2mm, which make the module easy to install and position, and realize the combination between modules. 5、The greater the surrounding light intensity, the smaller the photoresistor resistance; otherwise, the larger the photoresistor resistance. 5 x Light Sensor Module Condition: 100% Brand NewItem Type: Light Sensor ModuleControl Interface: GND, VCC, SIG(GND is the ground, VCC is the power supply, and SIG is the signal output pin)Photoresistance Model: GM5528Screw Positioning Holes: 4pcs