Project V - 19. Fire Alarm with Fire Sensor and Smoke Sensor based On Arduino

Fire Alarm with Fire Sensor and Smoke Sensor

Arduino is used to read the output of the MQ-2 gas sensor and the Flame sensor. If one of the sensors or both reads fire or smoke automatically, the alarm will sound and automatically the relay will be on. The relay is connected to the Electric Valve and then will open the valve to drain the water. For the application can also be added a relay connected to the AC Sirine, so the alarm sound will be firmer / louder.

Hardware Requirement

• Arduino Uno Board
• MQ-2 Gas Sensor
• IR Flame Sensor
• Relay 2 Channel Module
• Buzzer (Or you can AC Alarm)
• Electric Valve (Solenoid Valve)
• LCD 16*2
• Power supply +5 Volt
• Jumper

     IR Flame Sensor | Source                          MQ-2 Gas Sensor | Source

Selenoid Valve | Source                           Relay 1 Channel Module | Source

Alarm / Sirine AC | Source

Block Diagram

Schematic

Arduino - LCD Wiring

Arduino - Sensors Wiring

Arduino - Relays Wiring

Source Code/Sketch

#include <LiquidCrystal.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
float MQ2;
float sensorApi;
int adc;
byte kedip;
byte keluar;
void setup(){
pinMode(8,OUTPUT);
digitalWrite(8,LOW);
pinMode(9,OUTPUT);
digitalWrite(9,LOW);
lcd.begin(16, 2);
lcd.print("Alarm kebakaran ");
delay(2000);
lcd.clear();
lcd.print(" Tunggu sensor");
lcd.setCursor(0, 1);
lcd.print(" siap...");
delay(2000);
do{
adc=(analogRead(A0));
MQ2 = adc * (5.0 / 1023.0);
}
while(MQ2 > 1.5);
lcd.clear();
}
void loop(){
adc=(analogRead(A0));
MQ2 = adc * (5.0 / 1023.0);
adc=(analogRead(A1));
sensorApi = adc * (5.0 / 1023.0);
lcd.setCursor(0,0);
lcd.print("Api :");
lcd.print(sensorApi);
lcd.print(" ");
lcd.setCursor(0,1);
lcd.print("Asap:");
lcd.print(MQ2);
lcd.print(" ");
if (MQ2 > 1.2 || sensorApi<3){
lcd.setCursor(0,0);
lcd.print(" Ada kebakaran");
lcd.setCursor(0,1);
lcd.print("AlarmON ValveON");
digitalWrite(8,HIGH);
digitalWrite(9,HIGH);
delay(1000);
keluar=1;
do{
adc=(analogRead(A0));
MQ2 = adc * (5.0 / 1023.0);
adc=(analogRead(A1));
sensorApi = adc * (5.0 / 1023.0);
if(sensorApi>4 && MQ2<1)keluar=0;
}
while(keluar);
digitalWrite(8,LOW);
digitalWrite(9,LOW);
lcd.clear();
}
delay(100);
}

How it Works

1. Connect the Arduino with Peripherals needed.
2. Plug in the Power Source on the device.

3. Add some library if needed

4. Compile and upload the script program above to your arduino.

5. First initial LCD display 

6. Furthermore, if the sensor is ready then the display on the LCD displays the sensor readings.

7. When the sensor reads a fire or smoke the alarm goes off and the valve opens.

8. Furthermore, if the sensor has not read any smoke or fire then alarm and valve off again.

Video for Project V - 19. Fire Alarm with Fire Sensor and Smoke Sensor based On Arduino

Required file