Arduino with Fire Sensor, LED and Buzzer (Code)

Arduino with Fire Sensor, LED and Buzzer

Hello everyone! Today I will show you how to use a fire sensor with arduino. The required kits are :

1. An arduino and its adapter
2. Few jumper Wires
3. A fire sensor
4. A led
5. A breadboard
6. A buzzer
7. A lighter

There are 4 pins on the digital sound sensor. They are :

1. AO-Analog pin
2. GND-Ground pin
3. VCC-positive power pin
4. DO-digital output pin

There are two legs on a LED. The longer leg is positive and the shorter leg is negative. A buzzer has similar legs. The steps to setup hardware are listed below:

• Connect "VCC" pin of the sensor to 5V pin on the arduino.
• Connect "GND" ground pin to GND pin on the arduino.
• Connect "AO" analog output pin to any analog or digital pins on the arduino.In this tutorial I connected it with A2
• Connect longer LED leg to pin 13 on the arduino. If you want to use anyother pin on the arduino, you need to use a 220 ohm resistor.
• Connect shorter LED leg to GND pin on the arduino.
• FIx buzzer on the breadboard.
• Connect longer buzzer leg to pin 11(or any other pin) on the arduino.
• Connect shorter buzzer leg to GND pin on the arduino.

The setup is complete. Now, upload the code and enjoy.

Check out the tutorial

const int ledpin=13; // ledpin,flamepin and buzpin are not changed throughout the process
const int flamepin=A2;
const int buzpin=11;
const int threshold=200;// sets threshold value for flame sensor
int flamesensvalue=0; // initialize flamesensor reading
void setup() {
Serial.begin(9600);
pinMode(ledpin,OUTPUT);
pinMode(flamepin,INPUT);
pinMode(buzpin,OUTPUT);
}
void loop() {
flamesensvalue=analogRead(flamepin); // reads analog data from flame sensor
if (flamesensvalue<=threshold) { // compares reading from flame sensor with the threshold value
digitalWrite(ledpin,HIGH); //turns on led and buzzer
tone(buzpin,100);
delay(1000); //stops program for 1 second
}
else{
digitalWrite(ledpin,LOW); //turns led off led and buzzer
noTone(buzpin);
}
}