Flame Sensor Arduino Interfacing

Flame Sensor Arduino Interfacing

1. Flame Sensor Pins

• Flame sensor has four pins with different individual function.
• Flame sensor pins are given in the figure shown below.

2. Flame Sensor Pins Description

• Each pin has different tasks to perform.
• Flame sensor pin descriptions are listed in the table shown in the figure given below.

3. Flame Sensor Working Principle

• Flame sensor is very sensitive to flame and other lights.
• Its analog output provides real time output voltage on the thermal resistance.
• When the temperatures reaches at the certain threshold the output high and low signal threshold adjustable via potentio-meter , Its the task of digital output.

4. Flame Sensor Circuit Diagram

• Flame sensor diagram is shown in the figure given below.

5. Apparatus Required for Flame Sensor Interfacing with Arduino

• Arduino UNO (Micro-controller)
• Flame Sensor
• Jumper wires
• Wero board
• Light or another flame sensor

6. Flame Sensor & Arduino Pin Connections

• Connections between Arduino and flame sensor pins are given in the table shown in the figure below.

7. Flame Sensor Arduino Interfacing - Wiring Diagram

• Before hardware interfacing, you can also test your result on Proteus.
• For Proteus simulation, you need to know about How to get Hex File from Arduino.
• I have shared a brief tutorial on Interfacing of Flame Sensor with Arduino in my previous tutorial.
• I have given a completely labeled wiring diagram for Flame Sensor Arduino Interfacing.
• You can test & verify your results by making the same wiring diagram.
• Wiring diagram for Flame Sensor Arduino Interfacing is shown in the figure given below.

8. Flame Sensor Interfacing with Arduino Source Code & Description

• If you haven't written Arduino code ever, you must go through How to Write Arduino Code.
• You just need to copy & to paste the complete source code given below in your Arduino software.
• And just upload the code onto your Arduino board in order to verify the results.

int led_pin = 13 ;// initializing the pin 13 as the led pin

int flame_sensor_pin = 2 ;// initializing pin 7 as the sensor output pin
int flame_pin = HIGH ; // state of sensor

void setup ( )  {

  pinMode ( led_pin , OUTPUT ); // declaring led pin as output pin
  pinMode ( flame_sensor_pin , INPUT ); // declaring sensor pin as input pin for Arduino
  Serial.begin ( 9600 );// setting baud rate at 9600
}

void loop ( ) {
   flame_pin = digitalRead ( flame_sensor_pin ) ;  // reading from the sensor
  if (flame_pin == LOW )  // applying condition
  {
    Serial.println ( " FLAME , FLAME , FLAME " ) ;
    digitalWrite ( led_pin  , HIGH ) ;// if state is high, then turn high the led
  }
  
  else
  {
    Serial.println ( " no flame " ) ;
    digitalWrite ( led_pin , LOW ) ;  // otherwise turn it low
  } 
}

• First of all I have defined the pins for led and the flame sensor.
• The I have printed the digital information on the Serial Monitor obtained from the flame sensor.
• The messages are displayed on the serial monitor via Serial Communication.

9. Flame Sensor Interfacing with Arduino

• The actual circuit diagram for flame sensor interfacing with Arduino.

10. Flame Sensor Applications

• Flame sensor has a lot of different applications.
• Some of them are given below.