[Spridgets] (no subject)

[Jim Seippel]

-----Original Message-----
From: spridgets-bounces at autox.team.net
[mailto:spridgets-bounces at autox.team.net] On Behalf Of Larry Daniels
Sent: Thursday, February 17, 2011 10:05 PM
To: Rick Fisk; spridgets at autox.team.net
Subject: Re: [Spridgets] (no subject)

Aha, I see!  Thanks!

Here is a web site that provides a little more information on PIR (passive
infrared) detectors. 
http://home.howstuffworks.com/home-improvement/household-safety/security/que
stion238.htm 
Jim


-----Original Message----- 
From: Rick Fisk
Sent: Thursday, February 17, 2011 9:33 PM
To: spridgets at autox.team.net
Subject: Re: [Spridgets] (no subject)

Larry,

They work by emitting a beam of infrared light and then sensing how much is
reflected back.  A warm body reflects far more IR light than the air and the
light turns on even if the air is close to skin temperature.

Rick

----- Original Message ----- 
From: "Larry Daniels" <ladaniels at sbcglobal.net>
To: "Rick Fisk" <refisk at chartermi.net>; <spridgets at autox.team.net>
Sent: Thursday, February 17, 2011 10:13 PM
Subject: Re: [Spridgets] (no subject)


> Rick, not trying to be a smartass here (I don't really need to try), but
> if
> the motion detector is actually a temperature sensor, would it detect a
> body
> when the ambient temperature is about 98.6 degrees?  Seems like it would
> fail as it neared that temp.
>
> LAD
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