Human Infrared Detector

[Shakeel]

Hi,
i want to construct an infrared detector which could detect infrared from human body.
although there r more than sufficient websites which r offering that device(for sale) :'( but i want its easiest circuit which should be not only inexpensive but also easy to construct.
Please Please ??? Help me

 

[ante1]

Shakeel,

What you are looking for is a PIR detector. Search Google for

 

[steven2]

hello ive seen the circuit before on the net it was called the infrared bodsy heat detector, but the circuit was that big that you have to move the page to the left and right just to see it all ill try find it and report back when i do

 

[steven2]

you will find the humen infrared body heat detecter in discouver circuits webb site, the circuit is there

 

[asciiwhite]

http://info.hobbyengineering.com/specs/DIY-k30.pdf

and

http://science.howstuffworks.com/nightvision.htm