LDR Module

Introduction

The light sensor, also known as the light dependent resistor (LDR). Typically, the resistance of the light sensor will decrease when the ambient light intensity increases.

640px

640px

Features

Dimensions: 20.0×24.2×10.6mm

Net weight: 1.9g

Dimension

Schematics

• Schematics

Application Ideas

test code <syntaxhighlight lang="c">

1. include <math.h>

const int ledPin=12; //Connect the Linker LED module to Pin12, Digital 12 const int thresholdvalue=10; //The treshold for which the LED should turn on. Setting it lower will make it go on at more light, higher for more darkness

void setup() {

 Serial.begin(9600);                //Start the Serial connection
 pinMode(ledPin,OUTPUT);            //Set the LED on Digital 12 as an OUTPUT

} void loop() {

 int sensorValue = analogRead(0);  //Connect the Linker LDR module to A0, Analog 0
 float Rsensor;
 Rsensor=(float)(1023-sensorValue)*10/sensorValue;

 if(Rsensor>thresholdvalue)
 {
   digitalWrite(ledPin,HIGH);
 }
 else
 {
 digitalWrite(ledPin,LOW);
 }

 Serial.println(Rsensor,DEC);

} </syntaxhighlight>

How to buy

Here to buy LRD Module on store