Difference between revisions of "LDR Module"

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(Application Ideas)
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==Introduction==
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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.
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[[File:Linker ldr.jpg |400px]]
 
[[File:Linker ldr.jpg |400px]]
  

Revision as of 05:42, 8 April 2014

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.

Linker ldr.jpg

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

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

 Serial.println(Rsensor,DEC);

} </syntaxhighlight>

Schematics


How to buy

Here to buy LRD Module on store