Getting LED Lights ON/OFF In Arduino When Light Intensity Changes

Introduction

This article is for developers interested in the Internet of Things. I'll describe an Arduino project with automated lights that turn ON/OFF with a weather change as per the light intensity in LDR.

Requirements

Arduino Uno
Arduino Software
One LED light “5MM”
300 Ohm resister (2)
Jumper wire only five (Male to Male)
Bread broad
LDR (Light Dependent Resistor)

Steps to follow,

Step 1

First, connect the Arduino with the laptop or computer. Light blinks in the Arduino board.

Step 2

If you don’t have Arduino software take a look at this website

https://www.arduino.cc/en/Main/Software

Then after the installation process is complete, this page will appear on your screen

Step 3

Then Click TOOL- Select BOARD - Then press ARDUINO/GENUINO UNO R3

Again Select TOOL - Select a PORT- COM3 ARDUINO UNO

Step 4

I have given a source code you can use this or you can use your own source code.

Source Code

constintledPin = 13;
constintldrPin = A0;
void setup() {
Serial.begin(9600);
pinMode(ledPin, OUTPUT); //initialize the LED pin as an output
pinMode(ldrPin, INPUT);
}
void loop() {
intldrStatus = analogRead(ldrPin); //read the status of the LDR value
if (ldrStatus <= 200) -- - {
digitalWrite(ledPin, HIGH);
Serial.println("LDR is DARK, LED and BUZZER is ON");
}
else {
digitalWrite(ledPin, LOW); //turn LED off
Serial.println("---------------");
}
}

Step 5

Then click the verify button, to verify the program coding.

Automatic lights on and off Circuit diagram using LDR with the weather change.

Then click this button to upload.

When lights in my room are on the light in the bread broad is also off

These are the comments found in the dashboard of Arduino Software when Light in the breadboard is Off

When Room Lights are OFF, LDR sensor resistance becomes very high and with the help of our program Lights in the Breadboard turns ON.

These are the comments found in the dashboard of the Arduino Software when the light in the breadboard is On.

Weather change LDR resistance changes. The LED glows when light intensity is less and turns OFF when light intensity is high. This program is very simple to handle.

Summary

An Arduino project with Automated lights ON/OFF with Weather change is hence created and executed.

Very exciting articles are coming up next.

7 Comments

Join the conversation! Your thoughts help the community grow.

Nithyananda V G5y ago
It's very usefull
Hadshana Kamalanathan8y ago
Thanks for sharing
Munish A9y ago
Nice keep sharing........... ravi
Vidyadharran G9y ago
It's nice keep sharing....ravi
- Ravishankar Velladurai9y ago
  tq bro next article for using xamain.form
- Viknaraj Manogararajah8y ago
  nice article, thank you for sharing
Manikandan Murugesan9y ago
Great Ravi !!!!Keep doing the same.....