Misc. PIR




Archilochus

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Hi cmgmg,
This PIR detector kit keeps surfacing in slightly different forms. The following is an odd quote from their page:

Quote:
"It is no use having an excellent electronic circuit if the IR optical system is not very good."
End Qoute.

What makes this quote odd is that is EXACTLY what they have done!  They've taken a very nice PIR detector controller IC and used a real dud of a Fresnel lens on it.  Here's another quote:

Quote:
"It will reliably detect motion in the 3 to 4 meters range."
End Quote.

Translation: On a good day in the real world you can expect 3m (9+ ft) range, at best.

I'd take a look at Hamiltoe's PIR/timer kit - sounds like a fair deal.  Or if you want to "home-brew" your oun sensor and timers from scratch, you could try the circuits on my web-page:
http://www.geocities.com/archilochus57

Good Luck!,
Archilochus
 


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