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Introduction Photosensitive resistor is commonly seen in our daily life and is mainly used in smart switch and electronic design. To make it easier and more effective£¬ we supply corresponding modules. Photosensitive resistor is a semiconductor. It is featured with high sensitivity£¬ quick response£¬ spectral characteristic and R-value consistence£¬ maintaining high stability and reliability in extreme environment such as high temperature and high humidity. It’s widely used in automatic control switch fields like cameras£¬ garden solar lights£¬ lawn lamps£¬ money detectors£¬ quartz clocks£¬ music cups£¬ gift boxes£¬ mini night lights£¬ sound and light control switches£¬ etc. Sample code int sensorPin = 2; int value = 0; void setup() { Serial.begin(9600); } void loop() { value = analogRead(sensorPin); Serial.println(value£¬ DEC); delay(50); }