Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!usc!csun!csusac!sactoh0!americ!erk
From: erk@americ.UUCP (Erick Parsons)
Newsgroups: sci.electronics
Subject: Re: How can I fool the motion sensors connected to our lights?
Message-ID: <1110.AA1110@americ>
Date: 13 Jul 89 00:15:18 GMT
Followup-To: sci.electronics
Distribution: na
Lines: 44


From: logo@gorn.santa-cruz.ca.us (David Kiviat) Message-ID: <358@gorn.santa-cruz.ca.us>

>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. 


Heres a little something that I whipped up in a similiar situation :-)
                                                           
                                                            
                                                 mech       oooo 
             / /      /-- light sensor            arm      o| | 
           \/\/      /                               \     / / 
          -----     /                                 \   / / 
          |   | <---                 interface           / / 
           ---                |------|/                 |O| 
           | |                |little|                  | | 
           |  ----------------|black |                  | | 
           -------------------|box   |------------------| | 
                              |      |------------------|O| 
     Desk Top...              |------|                 /   \ 
     ------------------------------------------------------------------ 
     |                                                                |

Sorry couldn't resist..


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  Erick Parsons    //    Words for the wise:   *If it works don't fix it.*
  Sacramento Ca   //        mail to:   ...pacbell!sactoh0!americ!erk
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