Smoke Alarm System

This project is a demonstration of an Emergency Smoke Detection System developed my Fezan Butt with Arduino. All the required components are listed in the supplies.

The project uses components such as gas sensor and temperature sensor to take the inputs and use conditional codes to trigger output components such as LEDs and piezo buzzer. The project also includes a manual smoke ventilator switch.

x1 Arduino UNO R3, $27/- https://amzn.to/3Aee7II

x1 Breadboard, $17.99/- https://amzn.to/3KsnQQw

x1 Piezo Buzzer, $18.14/- https://amzn.to/3tHt4C0

x1 Temperature Sensor, $19.99/- https://amzn.to/3FCkEy4

x1 DC Motor, $15.98/- https://amzn.to/3tHhDdm

x1 LCD Display, $13.99/ https://amzn.to/33PTnL8

x1 Gas Sensor, $15.99/- https://amzn.to/3IaU80q

x1 LED (Green) & x1 LED (Red), $8.99/- https://amzn.to/3tHGw8T

x3 1k ohm resistors & x2 220 ohm resistors, $27.39/- https://amzn.to/3rAoYc2

x2 slide switches, $13.49/- https://amzn.to/3Ijr6vt

x1 9V battery, $12.97/- https://amzn.to/3nFxy8k

x1 9V battery connector, $4.99/- https://amzn.to/3GFaFt4

Connect the components specified above to arduino as shown in image and project file.

#include <LiquidCrystal.h> 

                //LCD Library

float temp; //temperature

float avengers; //temperature process

float marvel; //temperature output

int LED = 13; //LED (Red)

int awesomeSensor; //temperature Sensor

int annoyingBuzzer = 7; //Piezo Buzzer

LiquidCrystal lcd(12, 11, 6, 5, 4, 2); //LED Display

void setup() 

{ 

lcd.begin(16, 2);

pinMode(A0,INPUT); //Gas Sensor Analog Input

pinMode(A1, INPUT); //Temperature sensor analog Input

pinMode(LED,OUTPUT); 

pinMode(annoyingBuzzer,OUTPUT); 

Serial.begin(9600); 

} 

void loop() 

{ 

avengers=analogRead(A1); 

marvel=(avengers/1023)*5000; //Marvel is the reduced version of avengers

temp=(marvel-500)/10;    //temp is reduced and final version of Avengers analog data 

awesomeSensor=analogRead(A0); //Temperature Input

if (temp>=80) //Minimum Temperature to trigger the process

{ 

digitalWrite(LED, HIGH); 

 delay(250);        //Blink Loop

 digitalWrite(LED, LOW);

 delay(50);

} 

else 

{ 

digitalWrite(LED,LOW); 

} 

if (awesomeSensor>=100) //Minimum Analog value of gas sensor to trigger the alarming process

{ 

digitalWrite(annoyingBuzzer,HIGH); //Piezo Buzzer: Start

digitalWrite(LED, HIGH); //Conditional Blink

 delay(250);

 digitalWrite(LED, LOW);

 delay(50);

} 

else 

{ 

digitalWrite(annoyingBuzzer,LOW);//Piezo Buzzer: Stop

digitalWrite(LED,LOW);

} 

lcd.setCursor(1,0);  //LED Display    

 lcd.print("Temp.(C)= "); 

 lcd.print(temp); //Temperature Outpu in Degree Celsius 

 lcd.setCursor(0,1);

 if(awesomeSensor>=100) {

  lcd.print("Smoke Detected");

 }

 else{

  lcd.print("No Smoke Found");

 }

Serial.print("in DegreeC= "); //Serial Print 

Serial.print(" "); 

Serial.print(temp); 

Serial.print("\t"); 

Serial.print("awesomeSensor= "); 

Serial.print(awesomeSensor); 

Serial.println(); 

delay(1000); //Serial Print Data Refresh Rate

}

The temperature sensor sends the float data to the board, which triggers the LED in a condition of at least 80 degrees Celsius.

Gas sensor detects smoke in the atmosphere in a short range, when the analogue input passes through a certain range of 100, it triggers the piezo buzzer and LEDs.

The manual fan switch enables the 9v battery to deliver power to the DC motor connected to a fan.