flame sensor....

[stealthstinger101]

just like i said in the subject title, does anyone know how to make a simple but, efficient(and cheap) fire sensor?
and how would i program it into the micro controller? thx in advance.

~STEALTHSTINGER101   XD

[Somchaya]

Hmm, the easiest I can think of would be to use a temperature sensor. Assuming you can stick the sensor into a fire, if you register a temperature above a threshold, you can declare it as a fire.

This wouldn't be terribly accurate I suppose, but it might get the job done well enough.

[Admin]

I would just say buy one . . . they cost like ~$60 . . .

if that isnt an option, why not try an infrared sensor (heat is radiated in IR)?

[Hal9000]

Hack a fire alarm?

The government probably pours money into making them as cheap as possible. I would definitely look into simply hacking one of these.

Turn off the sound, of course.........however..........to activate the sound this may be some sort of +5V channel or something.

Ideal for a microcontroller, perhaps.

[Hal9000]

Also, when doing something like this, maybe a thermocouple would be absolutely brilliant. Very cheap.

You would need to amplify the o/p though......?!!

[Tsukubadaisei]

I have some ideas, but first I would like to know why do you want to sense fire and how(and where and for how long) the fire is going to appear. I mean for each situation a different kind of sensor is required. Sometimes you could use the smoke, sometimes it is better use IR, sometimes direct contact with a thermoresitor is the best, it depends a lot on the situation. Please expain the situation.