Just curious if anyone on the forum has played around with radar jammers and designed / built their own.

I've built several different types and had various successes with them including one which you can actually set what speed you want the police radar gun to read.

Anyways, just curious if anyone else played around with these things and wanted to share / discuss designs.

DISCLAIMER: Radar jamming is illegal, so I only want to discuss the theoretical aspects thereof and not actual usage of.

 

not worth the risk

its obvious if you are speeding to a cop.

They see traffic flow all day, so they know what to look for. Police are not as dumb as people think.

Also, if your flying by people and you can manipulate the gun to read "65PMPH" and you are flying by people....that would be an easy indication something is up

Why do you want to speed so bad? Take it to the track if you are racing.

I use a 8500 X50 all the time, but I know its not 100%. I dont speed anymore. I used to.

Anytime a car would pass me, I would get the urge to be 16, but no more

I go 65 70

 

Has nothing to do with speeding. Just something fun to do. Just because someone builds a 700HP Twin Turbo G35 doesn't mean they are going to go out and race and speed on the streets. Likewise, just because someone designs and builds radar jammers doesn't mean they are going to do the same . . . Its just the challenge of the build and seeing something that works.

Of course, sitting in the bushes and giving other people tickets is a lot of fun! LOL

 

this sounds like a bad idea. lets suppose you set it to read 55mph for the freeway and turn it on....now you get off and are driving on side streets but forget to turn it off, the speed limit is 25 and you're going 25 but guess what you just got clocked for 55....you're screwed. try explaining that one to the judge.

 

Again, its not something you use in practice. The actual size of these things are quite large and very impractical. Plus, having a huge antenna on your dashboard is enough to get anyone's attention.

The unit below is a K-band (24.250GHz) jammer system that you can modulate to any frequency you want - in otherwords, set what speed you want the police radar gun to read. You basically modulate the antenna at the doppler frequency of the speed - very simple. The antenna unit itself was from a K-band police radar gun.

Its also impractical from the standpoint that the jammer only covers one band. You would need several systems to cover all bases so to speak.

 

Now this little thing is even more fun . . .

Its the doppler unit from the inside of an X-band motion detector - the type you see at grocery stores, etc... They cost about $10 bucks at surplus electronics stores.

The fun part is that when you drive on the highway, you plug it in, and then activate anyone's radar detectors that are nearby. Its fun watching some yap doing 80 mph down the highway and then plugging it in only to watch him slam on the brakes. If you get a real sucker, you can do it over and over again.

 

why?

 

because screwing with people at the expense of safer highways is very entertaining

 

nice work! i wish i was a EE. is it possible to set the speed with laser ?

 

Absolutely!

I don't think there is much you can do with laser because of the coherent nature of laser light. With a radar antenna, the beam is quite wide, but with a laser, its very directional and you would have to point the beam directly at the laser gun's sensor. (Try pointing a laser pointer at a 1 inch target 100 meters away and keep it steady on the target!) - Perhaps with a really high power laser you can defocus (decollimate) the beam enough to put a huge spray of light at a distance . . .

 

yeah but then the cops holding the laser guns are going to have this huge laser flash them as you are driving by.

 

Actually not. Police laser works in the infrared region. Its invisible to the naked eye.