Energy Efficient Light Bulb

A smart light bulb, which will turn on only when it's required. And avoid wastage of electricity.

Sep 29, 2021

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arduino uno r3

pir sensor

light sensor

Components and supplies

Arduino UNO

LED Light Bulb, Frosted GLS

LDR, 5 Mohm

Power Relay, SPDT

PIR Sensor, 7 m

Slide Switch

Project description

Code

Energy Efficient Light Bulb

c_cpp

1void setup()
2{
3  pinMode(2, INPUT);
4  pinMode(4, OUTPUT);
5   pinMode(6, INPUT);
6  pinMode(A5, INPUT);
7  
8  Serial.begin(9600);
9}
10
11void   loop()
12{
13  int sv = digitalRead(6);
14  int lv = analogRead(A5);
15  int   mv = digitalRead(2);
16  
17  Serial.println(mv);
18  
19  if(sv==0)  //switch   is off  
20  {
21    if(lv>1000)    //sunlight is absent
22    {
23      if(mv==1)    //motion detected
24      {
25        digitalWrite(4,LOW);  //light bulb turns   on
26      }
27      else   //motion is not detected
28      {
29        digitalWrite(4,HIGH);    //light bulb turns off
30      }
31    }
32  }
33  else  // switch is on
34   {
35    if(mv==1)    //motion is detected
36    {
37      digitalWrite(4,LOW);   //light bulb turns on
38    } 
39    else  //motion is not detected
40    {
41       digitalWrite(4,HIGH);   //light bulb turns off
42    }
43  }
44}

void setup()
{
  pinMode(2, INPUT);
  pinMode(4, OUTPUT);
   pinMode(6, INPUT);
  pinMode(A5, INPUT);
  
  Serial.begin(9600);
}

void   loop()
{
  int sv = digitalRead(6);
  int lv = analogRead(A5);
  int   mv = digitalRead(2);
  
  Serial.println(mv);
  
  if(sv==0)  //switch   is off  
  {
    if(lv>1000)    //sunlight is absent
    {
      if(mv==1)    //motion detected
      {
        digitalWrite(4,LOW);  //light bulb turns   on
      }
      else   //motion is not detected
      {
        digitalWrite(4,HIGH);    //light bulb turns off
      }
    }
  }
  else  // switch is on
   {
    if(mv==1)    //motion is detected
    {
      digitalWrite(4,LOW);   //light bulb turns on
    } 
    else  //motion is not detected
    {
       digitalWrite(4,HIGH);   //light bulb turns off
    }
  }
}

Energy Efficient Light Bulb

c_cpp

1void setup()
2{
3  pinMode(2, INPUT);
4  pinMode(4, OUTPUT);
5  pinMode(6, INPUT);
6  pinMode(A5, INPUT);
7  
8  Serial.begin(9600);
9}
10
11void  loop()
12{
13  int sv = digitalRead(6);
14  int lv = analogRead(A5);
15  int  mv = digitalRead(2);
16  
17  Serial.println(mv);
18  
19  if(sv==0)  //switch  is off  
20  {
21    if(lv>1000)    //sunlight is absent
22    {
23      if(mv==1)   //motion detected
24      {
25        digitalWrite(4,LOW);  //light bulb turns  on
26      }
27      else   //motion is not detected
28      {
29        digitalWrite(4,HIGH);   //light bulb turns off
30      }
31    }
32  }
33  else  // switch is on
34  {
35    if(mv==1)    //motion is detected
36    {
37      digitalWrite(4,LOW);  //light bulb turns on
38    } 
39    else  //motion is not detected
40    {
41      digitalWrite(4,HIGH);   //light bulb turns off
42    }
43  }
44}

void setup()
{
  pinMode(2, INPUT);
  pinMode(4, OUTPUT);
  pinMode(6, INPUT);
  pinMode(A5, INPUT);
  
  Serial.begin(9600);
}

void  loop()
{
  int sv = digitalRead(6);
  int lv = analogRead(A5);
  int  mv = digitalRead(2);
  
  Serial.println(mv);
  
  if(sv==0)  //switch  is off  
  {
    if(lv>1000)    //sunlight is absent
    {
      if(mv==1)   //motion detected
      {
        digitalWrite(4,LOW);  //light bulb turns  on
      }
      else   //motion is not detected
      {
        digitalWrite(4,HIGH);   //light bulb turns off
      }
    }
  }
  else  // switch is on
  {
    if(mv==1)    //motion is detected
    {
      digitalWrite(4,LOW);  //light bulb turns on
    } 
    else  //motion is not detected
    {
      digitalWrite(4,HIGH);   //light bulb turns off
    }
  }
}

Downloadable files

Smart Bulb

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