Olin Lathrop ha scritto:
> Dario Greggio wrote:
>> but then the strong light will wake you up... :)
> 
> You don't have to turn on the bulb far enough to emit "strong light".  You
> get plenty of IR well before that.  Use just enough voltage so that it glows
> orange.  It can also be a small bulb close up.
> 

I see, I never tried that though, only observed some of such behaviour 
by chance.

I use NAIS-Matsushita Napion PIR in my home automation system, thay have 
TTL output, quite good response and angle, size more or less like a 10mm 
led.
They send RS485 messages to the PC, and the Windows software does its 
best to track and store recent activity and presence/absence per room.

-- 

Ciao, Dario
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Cyberdyne
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