This LDR Light Sensor Arduino compatible is used to detect light intensity. It is connected to both the analog output (AO) pin and the digital output (DO) pin. The greater the light intensity, the lower the LDR resistance. The sensor has a potentiometer knob that can be adjusted to change the sensitivity of LDR towards light.

This photoresistor module is light sensitive, making it perfect for applications like cameras, solar garden lights, and other automatic lighting.

Test Code

int sensorPin = 2;
int value = 0;

void setup () {
Serial.begin(9600);
}

void loop () {
value = analogRead(sensorPin);
Serial.println(value, DEC);
delay(50);
}