Energy Efficient Light Bulb

A smart Bulb, which will turn on only when required to avoid the wastage of electricity

Oct 1, 2021

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arduino uno

pir sensor

light sensor

Components and supplies

Slide Switch

Power Relay, SPDT

LDR, 5 Mohm

Arduino UNO

PIR Sensor, 7 m

Apps and platforms

Arduino IDE

Project description

Code

Energy Efficient Light Bulb

c_cpp

1// C++ code
2//
3void setup()
4{
5  pinMode(2, INPUT);
6  pinMode(4,   OUTPUT);
7  pinMode(6, INPUT);
8  pinMode(A5, INPUT);
9  
10  Serial.begin(9600);
11}
12
13void   loop()
14{
15  int sv = digitalRead(6);
16  int lv = analogRead(A5);
17  int   mv = digitalRead(2);
18  
19  Serial.println(mv);
20  
21  if(sv==0)  //switch   is off  
22  {
23    if(lv>1000)    //sunlight is absent
24    {
25      if(mv==1)    //motion detected
26      {
27        digitalWrite(4,LOW);  //light bulb turns   on
28      }
29      else   //motion is not detected
30      {
31        digitalWrite(4,HIGH);    //light bulb turns off
32      }
33    }
34  }
35  else  // switch is on
36   {
37    if(mv==1)    //motion is detected
38    {
39      digitalWrite(4,LOW);   //light bulb turns on
40    } 
41    else  //motion is not detected
42    {
43       digitalWrite(4,HIGH);   //light bulb turns off
44    }
45  }
46}

// C++ code
//
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

1// C++ code
2//
3void setup()
4{
5  pinMode(2, INPUT);
6  pinMode(4,  OUTPUT);
7  pinMode(6, INPUT);
8  pinMode(A5, INPUT);
9  
10  Serial.begin(9600);
11}
12
13void  loop()
14{
15  int sv = digitalRead(6);
16  int lv = analogRead(A5);
17  int  mv = digitalRead(2);
18  
19  Serial.println(mv);
20  
21  if(sv==0)  //switch  is off  
22  {
23    if(lv>1000)    //sunlight is absent
24    {
25      if(mv==1)   //motion detected
26      {
27        digitalWrite(4,LOW);  //light bulb turns  on
28      }
29      else   //motion is not detected
30      {
31        digitalWrite(4,HIGH);   //light bulb turns off
32      }
33    }
34  }
35  else  // switch is on
36  {
37    if(mv==1)    //motion is detected
38    {
39      digitalWrite(4,LOW);  //light bulb turns on
40    } 
41    else  //motion is not detected
42    {
43      digitalWrite(4,HIGH);   //light bulb turns off
44    }
45  }
46}

// C++ code
//
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

Energy Efficient Light Bulb

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