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Regarding Fire Sensor

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sri45

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Hi,

Here in my project i need a sensor for fire/smoke detector
used in a closed room
can anyone say me which is the best and cost effective.
If possible please send me the interface circuit of this to microcontroller.

thanking you
 

Well I can suggest a circuit for fire detection that is simple and cost effective.
Try using a thermister with a Philips 4046 IC, then use an RC circuit as guiding pulse, then use thermister pulse as the locking signal.

I don't have the circuit as of now. I shall post it in some time.

~Kalyan.
 

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