Photosensitive Sensor Module (LDR) for Arduino (Catalex)

Project

Min

Typical values

Max

Unit

Power supply voltage VCC

2.7

5

5.5

V

Current (@ VCC = 5V)

0.5

-

6

mA

Light resistance (@ 10lux)

5

-

20

KΩ

Dark resistance (@ 0lux)

-

1

-

MΩ

Size

24X24X10

mm

Weight

3

g

/*

Demo for Moisture Sensor

by Catalex

catalex.taobao.com

 */

#include

void setup() {

  Serial.begin(9600);

}

void loop() {

  int sensorValue = analogRead(A0);

  float Rsensor;

  Rsensor=(float)(1023-sensorValue)*10/sensorValue;

  Serial.println("The resistance of the Light sensor is ");

  Serial.print(Rsensor,1);

  Serial.println(" KOhm");

  delay(1000);  

}