G'day Bill,



14 Dec 96 07:20, Bill Grimsley wrote to Chris Burgess:



 BG> Especially as I suspect that the alarm system in question uses PIR

 BG> rather than beam-type detectors (and PIR is pretty hard to beat).



Some (most?) of them can easily be 'flooded' with IR.  Has the same

effect as shining a torch into the lens of a camera.

The 'hard' part is in increasing the ambient IR slow enough to avoid

triggering the sensor(s), and of course ensuring that you don't move

to a position inbetween the sensor and your IR source.



Cheers,

Rod



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