Ks0036 keyestudio Flame Sensor

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This flame sensor can be used to detect fire or other lights with wavelength stands at 760nm ~ 1100nm.
In the fire-fighting robot game, the flame plays an important role in the probe, which can be used as the robot's eyes to find fire source.


  • Supply Voltage: 3.3V to 5V
  • Detection Range: 20cm (4.8V) ~ 100cm (1V)
  • Rang of Spectral Bandwidth: 760nm to 1100nm
  • Operating Temperature: -25℃ to 85℃
  • Interface: Digital

Connection Diagram

Connect the D0 pin to digital 2, GND pin to GND port, VCC pin to 5V port.

Sample Code

const int flamePin = 2;     // the number of the flame pin
const int ledPin =  13;      // the number of the LED pin
// variables will change:
int State = 0;         // variable for reading status
void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);      
  // initialize the pushbutton pin as an input:
  pinMode(flamePin, INPUT);     
void loop(){
  // read the state of the value:
State = digitalRead(flamePin);
  if (State == HIGH) {     
    // turn LED on:    
    digitalWrite(ledPin, HIGH);  
  else {
    // turn LED off:
    digitalWrite(ledPin, LOW); 


Done wiring and powered up, upload well the code to the board.
Then if you put a lighter close to the sensor, when the sensor detects the flame, another led on the sensor is turned on.



  • Video


  • PDF and Code


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