IR Flame Sensor Features
The flame sensor is actually an infrared receiver. In this module, the output of the infrared receiver is measured using a comparator IC. If the fire and flame (or any other infrared source) is close to the sensor, the output of the comparator is LOW, otherwise the output is HIGH.
Note
There is a potentiometer on board to change the sensor’s sensitivity. In practice, this potentiometer changes the reference voltage of the comparator IC (the same voltage that the sensor voltage is compared with). If necessary, you can use it to change the sensitivity of your sensor.
IR Flame Sensor Pinout
This sensor has 3 pins:
- VCC: Module power supply – 3.3-5 V
- GND: Ground
- DO: Digital output
You can see pinout of this module in the image below.
Required Materials
Hardware Components
Software Apps
Interfacing IR Flame Sensor with Arduino
Step 1: Circuit
The following circuit shows how you should connect Arduino to IR Flame Sensor. Connect wires accordingly.
Step 2: Code
Upload the following code to your Arduino and then open serial monitor. If you approach flame to the sensor, you will see Flame Detected in the serial monitor.
/*
IR Flame Sensor
modified on 20 Sep 2020
by Mohammad Reza Akbari @ Electropeak
Home
*/
int Flame = 2; // Flame sensor connected to digital pin 2
void setup() {
pinMode(Flame, INPUT);
Serial.begin(9600);
}
void loop() {
if (digitalRead(Flame) == LOW) {
Serial.println("Flame Detected");
}
delay(100);
}
