Arduino Fire Alarm

1int relay = 4 ;// define relay pin
2int flamedigital = 9; // define  the flame sensor digital pin
3int flameanalog = A3; // define the flame sensor  analog pin
4int buzzer = 11; //define buzzer pin
5int val ; // define numeric  variable val
6float sensor; //define floating variable sensor
7
8void setup  ()
9{
10  pinMode (flamedigital, INPUT) ;// input interface defines the flame  sensor
11  pinMode (flameanalog, INPUT) ;// input interface defines the flame sensor
12  pinMode (relay, OUTPUT); //output interface defines the relay
13  pinMode (buzzer,  OUTPUT); //output interface defines the buzzer
14}
15
16void loop ()
17{
18  sensor = analogRead(flameanalog); //read flameanalog value and assigne it to sensor  variable
19
20
21  val = digitalRead (flamedigital) ;// read flamedigital value  and assigne it to val variable
22  if (val == HIGH) // When the flame sensor detects  a signal relay is on and buzzer sound (void alarm)
23  {
24    alarm();
25    digitalWrite  (relay, HIGH); //close the relay circuit
26
27  }
28  else
29  {
30    digitalWrite  (relay, LOW); //open the relay circuit
31  }
32  delay(1000);
33}
34
35void  alarm()  {
36  tone(buzzer, 400, 500); //the buzzer emit sound at 400 MHz for 500  millis
37  delay(500); //wait 500 millis
38  tone(buzzer, 650, 500); //the buzzer  emit sound at 650 MHz for 500 millis
39  delay(500); //wait 500 millis
40}
41

1int relay = 4 ;// define relay pin
2int flamedigital = 9; // define
3  the flame sensor digital pin
4int flameanalog = A3; // define the flame sensor
5  analog pin
6int buzzer = 11; //define buzzer pin
7int val ; // define numeric
8  variable val
9float sensor; //define floating variable sensor
10
11void setup
12  ()
13{
14  pinMode (flamedigital, INPUT) ;// input interface defines the flame
15  sensor
16  pinMode (flameanalog, INPUT) ;// input interface defines the flame sensor
17
18  pinMode (relay, OUTPUT); //output interface defines the relay
19  pinMode (buzzer,
20  OUTPUT); //output interface defines the buzzer
21}
22
23void loop ()
24{
25
26  sensor = analogRead(flameanalog); //read flameanalog value and assigne it to sensor
27  variable
28
29
30  val = digitalRead (flamedigital) ;// read flamedigital value
31  and assigne it to val variable
32  if (val == HIGH) // When the flame sensor detects
33  a signal relay is on and buzzer sound (void alarm)
34  {
35    alarm();
36    digitalWrite
37  (relay, HIGH); //close the relay circuit
38
39  }
40  else
41  {
42    digitalWrite
43  (relay, LOW); //open the relay circuit
44  }
45  delay(1000);
46}
47
48void
49  alarm()  {
50  tone(buzzer, 400, 500); //the buzzer emit sound at 400 MHz for 500
51  millis
52  delay(500); //wait 500 millis
53  tone(buzzer, 650, 500); //the buzzer
54  emit sound at 650 MHz for 500 millis
55  delay(500); //wait 500 millis
56}
57