Project showcase
Turn On and Off LED by LDR (Toggle LDR)

Turn On and Off LED by LDR (Toggle LDR)

This example demonstrates how to use LDR as a switch; each time you cover the LDR, the LED is turned on (if it's off), and off (if it's on).

  • 38,668 views
  • 3 comments
  • 20 respects

Components and supplies

A000066 iso both
Arduino UNO & Genuino UNO
×1
Adafruit industries ada161 image 75px
Photo resistor
×1
Mfr 25frf52 10k sml
Resistor 10k ohm
×1
Mfr 25fbf52 221r sml
Resistor 221 ohm
×1
09590 01
LED (generic)
×1
11026 02
Jumper wires (generic)
×1
12002 04
Breadboard (generic)
×1

About this project

Overview

This example demonstrates the use of a LDR as a switch. Each time you cover the photocell, the LED (or whatever) is turned on (if it's off) or off (if it's on).

Code

Toggle LDRArduino
const int lamp = 7;
boolean x = true;
.
void setup() {
  Serial.begin(9600);
  pinMode(lamp , OUTPUT);

}

void loop() {
  int c = analogRead(A0);
  delay(500);
if ( c<300 && x == true){
  digitalWrite(7,HIGH);
   x = false;
   delay(1000);

}
else if ( c <300 && x == false){
x = true;
digitalWrite(7,LOW);
delay(1000);
}
}

Schematics

Toggle LDR
Download
Untitled hn88fpsng7

Comments

Author

Default
muhammed amar slik
  • 2 projects
  • 4 followers

Published on

April 25, 2017
Share

Members who respect this project

Pigeon kickerNigfisPhotoProfilepicTemp lcd out trlpwezvpo

and 15 others

See similar projects
you might like

Similar projects you might like

RGB LED Button Controller

Extremely simple project, my first even. Four buttons. Three to choose RGB values, one to choose whether to subtract or to add.

RGB LED Button Controller

Project showcase by Re

  • 7,977 views
  • 1 comment
  • 12 respects
Ambient Light Sensor Using Photo Resistor and LED Lights!

Uses a photo resistor to determine whether a room is bright, average or dark. It shows this using 3 LEDs and/or the serial monitor.

Ambient Light Sensor Using Photo Resistor and LED Lights!

Project tutorial by DCamino

  • 3,367 views
  • 4 comments
  • 17 respects
LED Dice

Learn how to simulate throwing a dice with the Arduino and 6 LEDs!

LED Dice

Project showcase by EvdS

  • 14,276 views
  • 11 comments
  • 49 respects
Weather Clock

A weather clock with Arduino, RTC, DHT22 and BMP180.

Weather Clock

Project showcase by Tittiamo

  • 7,665 views
  • 7 comments
  • 22 respects
Turn LEDs On/Off via Remote Control

I will show you how can you turn the LEDs on via the Colors button on your remote control.

Turn LEDs On/Off via Remote Control

Project tutorial by ismystore

  • 6,930 views
  • 0 comments
  • 5 respects
Simple Programmable Robotic Arm

Make a simple and programmable servo arm out of readily available materials!

Simple Programmable Robotic Arm

Project showcase by Ryan Chan

  • 49,020 views
  • 63 comments
  • 145 respects
Add projectSign up / Login