How to make Fire alarm system using Arduino

 Circuit diagram

Components Required:-

1. Arduino Uno  :-                                                                                                                                                  
   
   
   
2. Flame sensor module :-                                                                                                                                                                                                                                      
3. 16x2 LCD display :-                                                                                                                                                                                                                  
4. 10K Potentiometer :- 

Flame sensor

Flame sensor is a type of detector , whose function is to detect presence of Flame.

If a flame is detected, It provides a digital output signal with logic 1 and if no flame is present, then a digital output of 0 volts is present.

 Pinouts:-

1. VCC:- Connect +5Volts over here

2. GND:- Connect GND or 0V over here

3.DO:- Digital Output from module

16x2 LCD display

The name "16x2 LCD display" came from this fact that is has 16 columns and 2 rows , that means we can display 32 characters on this LCD display screen. Characters could  be either alphabets, numbers or custom made characters. Each column is made from 5 x 8 matrix of pixels which means 40 pixels per column .

                

Features:-

• Operating voltage is  4.7V to 5.3V
• Current consumption is 1mA without backlight
• Alphanumeric LCD display module, meaning can display alphabets and numbers
• Can work on both 8-bit and 4-bit mode
• Available in Green and Blue Backlight

Pinouts:-

1. Vss:-  Connect GND here

2. Vdd:- Powers the LCD with +5V (4.7V – 5.3V)

3.VEE:-To set contrast of display

4.Register Select:-command/data register

5.Read/Write:-Used to read or write data. Normally grounded to write data to LCD

6.Enable:- To enable Read/Write on LCD

7. Data bit 0:- To microcontroller to send 8 bit data

8. Data bit 1:- To microcontroller to send 8 bit data

9.Data bit 2:- To microcontroller to send 8 bit data

10.Data bit 3:- To microcontroller to send 8 bit data

11.Data bit 4:- To microcontroller to send 4/8 bit data

12.Data bit 5:- To microcontroller to send 4/8 bit data

13.Data bit 6:- To microcontroller to send 4/8 bit data

14.Data bit 7:- To microcontroller to send 4/8 bit data

15.LED+ :- To set backlight

16.LED-  :- To set backlight

Interfacing LCD, Flame sensor, Potentiometer with Arduino

• First connect  flame sensor with Arduino by  connecting VCC pin to 5 V of Arduino,  GND pin to  GND pin of Arduino, DO  pin to A0 pin of Arduino.
• Then Connect LCD screen with Arduino by connecting Vss & LED-  pin to GND pin of Arduino.
• Vdd & LED+ pin to 5V of Arduino.
• VEE pin to potentiometer's 2nd pin .
• RS pin to 6th pin of Arduino.
• R/W pin to 7th pin of Arduino.
• E pin to 8th pin of Arduino.
• DB4 pin to 9th pin of Arduino.
• DB5 pin to 10th pin of Arduino.
• DB6 pin to 11th pin of Arduino.
• DB7 pin to 12th pin of Arduino.
• Then Connect 1st terminal of potentiometer to 5V and 3rd terminal to GND of Arduino.

Arduino Code

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#include <LiquidCrystal.h>

LiquidCrystal lcd(6,7,8,9,10,11,12);

int flame,sensor=A0,detected=0,buzzer=A1;

void setup() 

{

  pinMode(sensor,INPUT);

  pinMode(buzzer,OUTPUT);

  lcd.begin(16,2);

}

void loop() 

{

  flame=digitalRead(sensor);

  lcd.clear();

  if(flame==detected)

  {

    lcd.print("Fire detected");

    lcd.setCursor(0,1);

    lcd.print("alarms are on");

    digitalWrite(buzzer,HIGH);

  }

  else

  {

    lcd.print("All set");

    lcd.setCursor(0,1);

    lcd.print("alarms are off");

    digitalWrite(buzzer,LOW);

  }

  delay(100);

}

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To understand this project in detail then please watch my tutorial on YouTube by CLICKING HERE or on this image:-