Auto Switch LED light with LDR Sensor and LCD Display - B24

A simple automatic light switching system using LDR sensors and LCD Display

BeginnerFull instructions provided1 hour239

Auto Switch LED light with LDR Sensor and LCD Display - B24

Things used in this project

Hardware components

Arduino UNO

LDR, 5 Mohm

DFRobot I2C 16x2 Arduino LCD Display Module

Jumper wires (generic)

Male to male and Male to female

LED (generic)

Breadboard (generic)

Resistor 330 ohm

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Multitool, Screwdriver

Story

In this project I gonna make auto light switch with LDR sensor. You can adjust the light intensity to make how sensitive your sensor is.

By the way, don't forget to add the I2C library to your IDE.Good luck:D
And one more thing the yellow LED is where the LDR sensor is located, so don't take it wrong guys

Code

Auto Light Switch Code

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

const int ledPin = 12;   //the number of the LED pin
const int ldrPin = A0;  //the number of the LDR pin
LiquidCrystal_I2C lcd(0x27, 16, 2);


void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("SELAMAT DATANG  ");
  pinMode(ledPin, OUTPUT); 
  pinMode(ldrPin, INPUT);   
}

void loop() {
  int ldrStatus = analogRead(ldrPin);   //read the status of the LDR value
Serial.println(ldrStatus);
   if (ldrStatus <=80) {

    digitalWrite(ledPin, HIGH);         //turn LED on
    lcd.print("LAMPU HIDUP");
    lcd.setCursor(0,3);

   }
  else {

    digitalWrite(ledPin, LOW);          //turn LED off
    lcd.print("LAMPU MATI ");
    lcd.setCursor(0,3);
  }
  delay(500);
}