Post
Ask Question

LDR Using Arduino Mega 2560

Introduction

 
In this article, I will explain about the LDR (Light Dependent Resistor). It will measure the light level using the Arduino Mega 2560.
 
Parts
  • Arduino Mega 2560
  • LDR
  • LED
  • BreadBoard
  • Resistor
  • Hookup wires
LDR
 
 
Figure 1: LRD
  • Light Dependent Resistor (LDR): it will measure the light level.
  • It will sense the light level.
Connection
 
Step 1: Connection From The LDR To Arduinomega2560.
  • Take the positive pin connected to the Analog pin of A1 and also connect to the resistor with the positive pin connected with the Gnd.
  • The negative pin can be connected to the 5v of the Arduino Mega 2560.
Step 2: Connection From The LED To Arduino Mega 2560
  • Positive pin = 11
  • Negative pin = Gnd.
Programming
  1. int LDR=A1;      
  2. int led=11;        
  3. int ldr reading=0;        
  4. void setup()        
  5. {        
  6.   pinMode(led,OUTPUT);      
  7.   Serial.begin(9600);        
  8. }        
  9. void loop()        
  10. {        
  11. ldr reading=analogRead(LDR);      
  12.   if(value < 800)      
  13. {      
  14.   digitalWrite(led,HIGH);       
  15. }      
  16. else      
  17. {      
  18.   digitalWrite(led,LOW);      
  19. }      
  20.   Serial.println(ldr reading);        
  21.   delay(200);        
  22. }   
Explanation
 
In this article, I have explained about the light measuring level when the light has a low level, or at the high level, it will display in the serial monitor.
 
Output
 
 
Figure 2: Output
 
Read more articles on the Internet of Things:


Similar Articles