Xref: utzoo rec.autos:15598 sci.electronics:5243 misc.consumers:8830
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!rutgers!bellcore!faline!thumper!ulysses!att!alberta!calgary!!hermann
From: hermann@.ucalgary.ca (Michael Hermann)
Newsgroups: rec.autos,sci.electronics,misc.consumers
Subject: Re: Radar Detectors (Ka band)
Summary: radar countermeasures
Keywords: radar, cops, Ka, X, K
Message-ID: <744@cs-spool.calgary.UUCP>
Date: 18 Feb 89 23:41:29 GMT
References: <742@cs-spool.calgary.UUCP>
Sender: news@calgary.UUCP
Lines: 25

In article <742@cs-spool.calgary.UUCP>, sparks@cpsc.ucalgary.ca (David Sparks) writes:
> placing the material(I dont know what it is) over the liscence plate, and
> connecting it to a Ka band Radar detector, the plate could be darkened in the
> time it takes to darken(1/1000 s I believe).  This might be a little co$tly,
> but so is a radar detector.


Hmm, don't need _quite_ a blast visor here, but it gave me an idea:

    Assuming with a little work you could pull from your radar detector
a useable trigger signal, you could use it to control a relay driving 
some sort of countermeasure. I think a large liquid crystal would do 
the trick, just large enough to fit over your license plate. Detector
goes off, pulls relay, drives liquid crystal (probably off car 12VDC),
plate made unviewable.
    Somebody must sell LC's in an appropriate dimension/configuration.
Didn't some company sell LC windows for your apartment/home, whose opacity
you could vary under control of a rheostat? Sounds like the right company
to talk to...


|  Mike Hermann  | ..!uunet!ubc-cs!calgary!hermann calgary!hermann@cs.ubc.ca
Organized Religion is like Organized Crime; it preys on peoples' weakness,
    generates huge profits for its operators, and is almost impossible
    to eradicate.   -- me