Any idea on how to build this ? thanks --- Simon Ethier sethier@justine.umontreal.ca ICQ 66019153 ----- Original Message ----- From: "Ray Russell" To: Sent: Tuesday, February 27, 2001 11:41 AM Subject: Re: [EE]: Infrared Detector vs Pet > In a message dated 2/27/01 11:10:08 AM Eastern Standard Time, > Seth889@STARTREKMAIL.COM writes: > > > > Hi, I'm wondering.. I heard in a publicity of an alarm company that they > > have an infrared detecter which can make the difference between pet and > > human (how, I don't know ... ok it don't really "make" the difference, but > > the IR won't react to a cat for exemple, but will react to a human) I found > > this very cool, especially if you have pet at your house... > > > > I'd like to build something like that ... Do any of you guys know what is > > the trick ? Is it less sensitive ? Does it require a minimum of movement > > ... > > > > > > Simon, > I use these detectors in my shop. They produce a multi path beam. Multiple > beams must be broken in both directions to set them off. We had a problem > with rodents getting into the shop. (We are in the country so field mice and > rats are common) > They kept setting off the old detectors. Even the mouse traps would set the > darn things off. The new ones are very sensative to humans but cats and mice > seem not to bother it at all! > > Ray Russell > General Contractor > Norfolk & Western Railroad > > Pocahontas Division > Circa 1958 > Visit The Pocahontas Website at: > Click here: Pocahontas Home > OR > http://milliron.home.sprynet.com/Pocahontas/Pocahontas1.htm > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics