how to convert the signal into useful information for the heat detector?

Question

this project will detect the occupancy of human being and it will switch on the light.

Answer 1

I use X-10 for home automation. I have a couple of these X-10 motion sensors for occupancy detection. These detectors will transmit an X-10 code to a radio receiver plugged into a wall outlet. The receiver then relays the signal via an X-10 power line command across the homes 120 VAC wiring. I have a dedicated X10 receiver which receives the code and runs macros, turning on/off lights as dictated.

You can use the wireless receiver to turn on/off a light/lights as a stand alone unit without the need for a dedicated controller.

Answer 2

Why a thermal detection device? use a capacity operated relay. inexpensive, pretty trouble free (ie, not effected by thermal changes) and there are ten dollar kits available....thats called being cost effective.

Answer 3

you need a pulsed infra red device to achieve your project

Answer 4

http://mstmicro.com/sensor/sensor.html
you need a pyro sensor.
measure heat, then look for change in heat.
MIKE

Answer 5

you can use transducers... or heat sensors which have thermocouples.... this will produce electrical signals..