Interface Fire Sensor With 8051

A flame sensor is designed to detect the presence of a flame or fire.

  • If flame sensor use IR sensor to detect flame,Infrared (IR) flame detectors monitor the infrared spectral band for specific patterns given off by hot gases.
  • Typically sensitive to wavelengths around 4.4 micrometers, which is a spectral characteristic peak of hot carbon dioxide as is produced in a fire.
  • The usual response time of an IR detector is 3 to 5 seconds.
  • The flame sensor is very sensitive to IR wavelength at 760 nm ~ 1100 nm light.
  • It can give two output
    1.Analog: Time output voltage signal on the thermal resistance.
    2.Digital: When the temperature reaches a certain threshold, the output high and low signal threshold adjustable via potentiometer.

Hardware Required

  • Fire Sensor.
  • ADC 0804.
  • 8051 MicroController.

Pin Diagram

  • VCC:Positive voltage input: 5v for analog 3.3v for Digital,
  • A0: Analog Output,
  • D0: Digital Output,
  • GND: GND.

Circuit Analog

Circuit Digital