Turn On & Off of LED with Photoresistor

Do you want to turn more Leds then the Room is getting darker and darker with Photoresistor, then this is for you

Aug 3, 2021

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photoresistor with led

led with photoresistor

project with photoresistor

photoresistor sensor projects

easy projects with photoresist

Components and supplies

Resistor 220 ohm

Photo resistor

LED (generic)

Resistor 10k ohm

Arduino UNO

Apps and platforms

Arduino IDE

Project description

Code

The Code

c_cpp

1#include <EEPROM.h>
2const int ldrsen = A0;
3int Led = 13;
4int   value = 0;
5int LedPin2 = 12;
6int LedPin3 = 11;
7int LedPin4 = 10;
8//
9void   setup() {
10  delay(2000);
11  Serial.begin(9600);
12  pinMode(LedPin2, OUTPUT);
13   pinMode(LedPin3, OUTPUT);
14  pinMode(LedPin4, OUTPUT);
15  pinMode(Led, OUTPUT);   
16  pinMode(ldrsen, INPUT);
17  
18  // Starting the TEST
19  
20  Serial.println("======Starting   the Test======");
21  Serial.println("You should see the Led blinking every 2   sec");
22  digitalWrite(Led, HIGH);
23  delay(200);
24  digitalWrite(Led, LOW);
25   delay(200);
26  digitalWrite(LedPin2, HIGH);
27  delay(200);
28  digitalWrite(LedPin2,   LOW);
29  delay(200);
30  digitalWrite(LedPin3, HIGH);
31  delay(200);
32  digitalWrite(LedPin3,   LOW);
33  delay(200);
34  digitalWrite(LedPin4, HIGH);
35  delay(200);
36  digitalWrite(LedPin4,   LOW);
37  delay(200);
38  Serial.println("Test 1 is completed");
39  Serial.println("Now   testing the Photoresistor, Make sure it is connected to the Pin A0");
40  delay(2000);
41   Serial.println("Starting the test now!");   
42   
43   rerun:
44  value   = analogRead(ldrsen) /4;
45  
46  if(value >1){
47    Serial.print("The Photoresistor   is connected and here are some value: ");
48    delay(200);
49    Serial.println(value);   
50    delay(200);
51    Serial.println(value); 
52    delay(200); 
53    Serial.println(value);     
54  }
55    else{
56      value = analogRead(ldrsen)/4 ;
57        if(value<0)
58           Serial.println("Hmm the Photoresistor is not connected");
59          Serial.println("Retrying   in 5s");
60          delay(5000);
61          goto rerun;
62        }
63          Serial.println("======END======");
64}
65
66
67   //*************************LOOP*******************
68
69
70 
71void loop() {
72   value = analogRead(ldrsen)/4;
73  delay(100);
74    if(value < 50){
75    digitalWrite(Led,   HIGH);
76  }
77  else
78  {
79    digitalWrite(Led, LOW);
80  }
81  //Led2
82   if(value < 70){
83    digitalWrite(LedPin2, HIGH);
84  }
85  else
86  {
87     digitalWrite(LedPin2, LOW);
88  }
89  if(value < 150){
90    digitalWrite(LedPin3,   HIGH);
91  }
92  else
93  {
94    digitalWrite(LedPin3, LOW);
95  }
96  if(value   < 200){
97    digitalWrite(LedPin4, HIGH);
98  }
99  else
100  {
101    digitalWrite(LedPin4,   LOW);
102  }
103}

#include <EEPROM.h>
const int ldrsen = A0;
int Led = 13;
int   value = 0;
int LedPin2 = 12;
int LedPin3 = 11;
int LedPin4 = 10;
//
void   setup() {
  delay(2000);
  Serial.begin(9600);
  pinMode(LedPin2, OUTPUT);
   pinMode(LedPin3, OUTPUT);
  pinMode(LedPin4, OUTPUT);
  pinMode(Led, OUTPUT);   
  pinMode(ldrsen, INPUT);
  
  // Starting the TEST
  
  Serial.println("======Starting   the Test======");
  Serial.println("You should see the Led blinking every 2   sec");
  digitalWrite(Led, HIGH);
  delay(200);
  digitalWrite(Led, LOW);
   delay(200);
  digitalWrite(LedPin2, HIGH);
  delay(200);
  digitalWrite(LedPin2,   LOW);
  delay(200);
  digitalWrite(LedPin3, HIGH);
  delay(200);
  digitalWrite(LedPin3,   LOW);
  delay(200);
  digitalWrite(LedPin4, HIGH);
  delay(200);
  digitalWrite(LedPin4,   LOW);
  delay(200);
  Serial.println("Test 1 is completed");
  Serial.println("Now   testing the Photoresistor, Make sure it is connected to the Pin A0");
  delay(2000);
   Serial.println("Starting the test now!");   
   
   rerun:
  value   = analogRead(ldrsen) /4;
  
  if(value >1){
    Serial.print("The Photoresistor   is connected and here are some value: ");
    delay(200);
    Serial.println(value);   
    delay(200);
    Serial.println(value); 
    delay(200); 
    Serial.println(value);     
  }
    else{
      value = analogRead(ldrsen)/4 ;
        if(value<0)
           Serial.println("Hmm the Photoresistor is not connected");
          Serial.println("Retrying   in 5s");
          delay(5000);
          goto rerun;
        }
          Serial.println("======END======");
}


   //*************************LOOP*******************


 
void loop() {
   value = analogRead(ldrsen)/4;
  delay(100);
    if(value < 50){
    digitalWrite(Led,   HIGH);
  }
  else
  {
    digitalWrite(Led, LOW);
  }
  //Led2
   if(value < 70){
    digitalWrite(LedPin2, HIGH);
  }
  else
  {
     digitalWrite(LedPin2, LOW);
  }
  if(value < 150){
    digitalWrite(LedPin3,   HIGH);
  }
  else
  {
    digitalWrite(LedPin3, LOW);
  }
  if(value   < 200){
    digitalWrite(LedPin4, HIGH);
  }
  else
  {
    digitalWrite(LedPin4,   LOW);
  }
}

The Code

c_cpp

1#include <EEPROM.h>
2const int ldrsen = A0;
3int Led = 13;
4int  value = 0;
5int LedPin2 = 12;
6int LedPin3 = 11;
7int LedPin4 = 10;
8//
9void  setup() {
10  delay(2000);
11  Serial.begin(9600);
12  pinMode(LedPin2, OUTPUT);
13  pinMode(LedPin3, OUTPUT);
14  pinMode(LedPin4, OUTPUT);
15  pinMode(Led, OUTPUT);  
16  pinMode(ldrsen, INPUT);
17  
18  // Starting the TEST
19  
20  Serial.println("======Starting  the Test======");
21  Serial.println("You should see the Led blinking every 2  sec");
22  digitalWrite(Led, HIGH);
23  delay(200);
24  digitalWrite(Led, LOW);
25  delay(200);
26  digitalWrite(LedPin2, HIGH);
27  delay(200);
28  digitalWrite(LedPin2,  LOW);
29  delay(200);
30  digitalWrite(LedPin3, HIGH);
31  delay(200);
32  digitalWrite(LedPin3,  LOW);
33  delay(200);
34  digitalWrite(LedPin4, HIGH);
35  delay(200);
36  digitalWrite(LedPin4,  LOW);
37  delay(200);
38  Serial.println("Test 1 is completed");
39  Serial.println("Now  testing the Photoresistor, Make sure it is connected to the Pin A0");
40  delay(2000);
41  Serial.println("Starting the test now!");   
42   
43   rerun:
44  value  = analogRead(ldrsen) /4;
45  
46  if(value >1){
47    Serial.print("The Photoresistor  is connected and here are some value: ");
48    delay(200);
49    Serial.println(value);  
50    delay(200);
51    Serial.println(value); 
52    delay(200); 
53    Serial.println(value);    
54  }
55    else{
56      value = analogRead(ldrsen)/4 ;
57        if(value<0)
58          Serial.println("Hmm the Photoresistor is not connected");
59          Serial.println("Retrying  in 5s");
60          delay(5000);
61          goto rerun;
62        }
63          Serial.println("======END======");
64}
65
66
67  //*************************LOOP*******************
68
69
70 
71void loop() {
72  value = analogRead(ldrsen)/4;
73  delay(100);
74    if(value < 50){
75    digitalWrite(Led,  HIGH);
76  }
77  else
78  {
79    digitalWrite(Led, LOW);
80  }
81  //Led2
82  if(value < 70){
83    digitalWrite(LedPin2, HIGH);
84  }
85  else
86  {
87    digitalWrite(LedPin2, LOW);
88  }
89  if(value < 150){
90    digitalWrite(LedPin3,  HIGH);
91  }
92  else
93  {
94    digitalWrite(LedPin3, LOW);
95  }
96  if(value  < 200){
97    digitalWrite(LedPin4, HIGH);
98  }
99  else
100  {
101    digitalWrite(LedPin4,  LOW);
102  }
103}

#include <EEPROM.h>
const int ldrsen = A0;
int Led = 13;
int  value = 0;
int LedPin2 = 12;
int LedPin3 = 11;
int LedPin4 = 10;
//
void  setup() {
  delay(2000);
  Serial.begin(9600);
  pinMode(LedPin2, OUTPUT);
  pinMode(LedPin3, OUTPUT);
  pinMode(LedPin4, OUTPUT);
  pinMode(Led, OUTPUT);  
  pinMode(ldrsen, INPUT);
  
  // Starting the TEST
  
  Serial.println("======Starting  the Test======");
  Serial.println("You should see the Led blinking every 2  sec");
  digitalWrite(Led, HIGH);
  delay(200);
  digitalWrite(Led, LOW);
  delay(200);
  digitalWrite(LedPin2, HIGH);
  delay(200);
  digitalWrite(LedPin2,  LOW);
  delay(200);
  digitalWrite(LedPin3, HIGH);
  delay(200);
  digitalWrite(LedPin3,  LOW);
  delay(200);
  digitalWrite(LedPin4, HIGH);
  delay(200);
  digitalWrite(LedPin4,  LOW);
  delay(200);
  Serial.println("Test 1 is completed");
  Serial.println("Now  testing the Photoresistor, Make sure it is connected to the Pin A0");
  delay(2000);
  Serial.println("Starting the test now!");   
   
   rerun:
  value  = analogRead(ldrsen) /4;
  
  if(value >1){
    Serial.print("The Photoresistor  is connected and here are some value: ");
    delay(200);
    Serial.println(value);  
    delay(200);
    Serial.println(value); 
    delay(200); 
    Serial.println(value);    
  }
    else{
      value = analogRead(ldrsen)/4 ;
        if(value<0)
          Serial.println("Hmm the Photoresistor is not connected");
          Serial.println("Retrying  in 5s");
          delay(5000);
          goto rerun;
        }
          Serial.println("======END======");
}


  //*************************LOOP*******************


 
void loop() {
  value = analogRead(ldrsen)/4;
  delay(100);
    if(value < 50){
    digitalWrite(Led,  HIGH);
  }
  else
  {
    digitalWrite(Led, LOW);
  }
  //Led2
  if(value < 70){
    digitalWrite(LedPin2, HIGH);
  }
  else
  {
    digitalWrite(LedPin2, LOW);
  }
  if(value < 150){
    digitalWrite(LedPin3,  HIGH);
  }
  else
  {
    digitalWrite(LedPin3, LOW);
  }
  if(value  < 200){
    digitalWrite(LedPin4, HIGH);
  }
  else
  {
    digitalWrite(LedPin4,  LOW);
  }
}

Downloadable files

shiny_luulia_37bHdyCXxd.brd

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siddh-1

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Intro

Components and supplies

Apps and platforms

Project description

Code

Downloadable files