Re: spyproofing your house/work building
<<Except that they would go off whenever the sun was up, or whenever a car with its headlights on drives up.>> So is there a way to detect the specific IR that the bad guys use?
On Fri, 18 Mar 1994, Arsen Ray Arachelian wrote:
<<Except that they would go off whenever the sun was up, or whenever a car with its headlights on drives up.>>
So is there a way to detect the specific IR that the bad guys use?
Probably. I am just pointing out that the *cheap* IR sensors that Rat Shack sells are activated by anything - not just IR light. There is probably a better model sold by some electronics company. -- Jim Lawson Computing & Information Technology jlawson@mole.uvm.edu University of Vermont Finger for PGP KeyID: FD0339
Excerpts from internet.cypherpunks: 18-Mar-94 Re: spyproofing your house/.. by Arsen Ray Arachelian@pri
<<Except that they would go off whenever the sun was up, or whenever a car with its headlights on drives up.>>
So is there a way to detect the specific IR that the bad guys use?
Measure the ratio of IR to visible light.
participants (3)
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Jim Lawson -
Matthew J Ghio -
rarachel@prism.poly.edu