Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!sco!gorn!logo
From: logo@gorn.santa-cruz.ca.us (David Kiviat)
Newsgroups: sci.electronics
Subject: How can I fool the motion sensors connected to our lights?
Message-ID: <358@gorn.santa-cruz.ca.us>
Date: 8 Jul 89 03:45:39 GMT
Reply-To: logo@gorn.santa-cruz.ca.us (David Kiviat)
Distribution: usa
Organization: The Planet Gorn
Lines: 16


I have just started work somewhere where the lights are controlled by a system
of motion sensors-if nothing moves in a pre-determined amount of time
the lights go off. I find this system most annoying as I am often
sitting at my desk working when the lights decide to go out and I
have to wave my arms to get them to go back on again. What I would
like to do is to build a device with a timer where when the timer was
wound some sort of signal would be broadcast that would fool the
motion sensors into thinking something was moving. When I left the
room the timer would run down and the device would shut off so the
lights could go out. What I need is some basic information on what
frequencies to use and any other general tips on building such a
device. Please note I am not against saving energy and the device I
have in mind will not cause the lights to stay on very long if I
forget to turn the timer off when I leave. Thanks in advance for any
help you can offer.