Path: utzoo!attcan!uunet!husc6!bloom-beacon!tut.cis.ohio-state.edu!purdue!decwrl!sun-barr!newstop!sun!amdahl!kelly
From: kelly@uts.amdahl.com (Kelly Goen)
Newsgroups: sci.electronics
Subject: Re: Car electronics projects
Summary: better ways....
Message-ID: <130002Ot44W001@amdahl.uts.amdahl.com>
Date: 29 Jul 89 12:22:20 GMT
References: <14053@haddock.ima.isc.com> <1594@cooper.cooper.EDU> <543@winnie.fit.edu>
Distribution: na
Organization: Amdahl Corporation, Sunnyvale CA
Lines: 26

In article <543@winnie.fit.edu>, acs60222@zach.fit.edu ( ENRIQUEZ) writes:
> In article <1594@cooper.cooper.EDU> gene@cooper.cooper.EDU (Gene (the Spook) ) writes:
> >
> >A change of roughly 3miles_per_hour_per_second or more, and the gun
> >won't lock on to you.  What I have wanted to do for quite a while is
> >to make a microwave generator that sweeps a few kHz on a 3MHz/24MHz
> >carrier.  Active ECM!
> >
>  
> About two years ago I saw a project that was labeled as a "microwave
> calibrator" that could actually generate the appropriate waves to
> force radar to 55mph, 35mph, or 25mph at a flick a switch.  It 
> was designed to be used with 12vdc and was small enough to let the
> transmitter fit behind the grill of your car. 
> 
> I must say the there were disclamers all over the article claiming
> the illegality of using this to trick police rader.  However, the box
> had a switch clearly labled 55,35, and 25 mph.  Now, there a subtle
> design for you!!
> 
> regards   mark enriquez 

There was also a calibrator available from the remote escort people for a while and additionally a board set from benton harbor instruments I believe... all could be used with a dual output gunnplexer to ah "calibate" both x&k band whatever... since ham band are so close there was an article in car&driver a few years ago decribing baseband jamming... in any case the point I am getting at here is that for this approach on toggles the power supplied to the gunnplexer at a given rate...hmm a little intelligen







ce tells one that the source of said pulses could easily be a 1 chip cheap basic micro with a piggy back rom containing the requisite timing program... the pulses could either be loop constrained or more portability tied to CTC's on some of the new micros such as the MC68HC11A4 some of these newer faster microcontrollers offer more interesting possibilities such as being used to generate digital proportional signals for a completely controlled digital servo model airplane...
                             cheers
                             kelly
p.s. if one ties in a hall effect sensor mounted near ones drive wheel along with a magnet epoxy glued to the wheels edge programmable speed offsets, brake lite cutouts and other fancy features become possible