Build your own WIFI jammer

Build your own WIFI jammer using a 2.4GHz AV transmitters. In this video I will show you how you can build your own jammer to jam a WIFI connection. I will also explain how this works and the difference between jamming and interference.

Wikipedia page on jamming : http://en.wikipedia.org/wiki/Radio_jamming

Av transmitters : http://www.amazon.co.uk/XL24017-Wireless-Transmitting-Module-Transmitter/dp/B008MF7XAU



Pictures here: https://plus.google.com/u/0/photos/100983775122405766032/albums/5875275471738140113

<p>Also from where you get the USB port? You sad is from some .....board but don't really understand which board. :(</p><p>Can you draw a schematic of all the connections?</p>
<p>From an old motherboard.</p>
<p>Hello everyone, please can anyone tell me how to get the type of transmitter that was used in this jammer</p>
What wires are you using for jumpers? I didn't get any with my transmitters
<p>I have build the 4 transmitters, set up each channel.</p><p>I connect 5V power supply, the total load is ~360mA.</p><p>On the spectrum analyzer the signal was seen as narrow, but the unit <br>block the wifi near it.</p>
<p>Can you post link where to buy the battery with charging circuit?</p>
<p>how much did it everything wind up costing you?</p>
<p>$30 or so for the transmitters, a bit more if you need a housing/wiring/solder </p>
<p>The transmitters finally came! I wired them up with 3.7V and set one to each channel (2410, 2432, 2450, 2468MHz). I'm getting a reading of about -15~-10dBm on each channel. However it doesn't seem to be working for my phone or laptop. Does anyone have an idea why my setup isn't working? Could lower voltage provide less power at the antenna?</p>
<p>Just a few ideas off the top of my head, Double check the bridge wiring, could be splitting between channels. I have the one I made running at 5V, might be enough to make a difference I suppose. If you are running android download Wifi Analyzer, Nice utility that shows strength of networks throughout the bands, Prob an apple equivalent. Good luck!</p>
<p>Sorry, I am a bit electric illiterate and I don't really get the part where you put the jumper to a specific channel, my A/V transmitters looks slightly different, from where do I put the jumper?</p><p>Many thanks!</p>
<p>I built this with those! if you look at it antenna up from the side with longer pins the 4 bottom pins go [ground,positive,video audio] you only need the ground and positive. The jumpers go on the 5 pin row to the left. You bridge the bottom one (ground) to the one next to it for low channels, ground to the one one pin away for slightly higher and so on.</p>
<p>hey,</p><p>i got the same transmitters.. but it looks like at the 5pin row there are two grounds.. is that right?<br>greets</p>
<p>Hey sorry, just noticed I never replied to this. You prob already figured it out but the 5 prong side is the band jumpers. Name them prong 1-5, 5 being the one closest to the antenna and 1 being the one farthest. You would bridge 1-2 for low band 1-3, for low/midband, 1-4 for mid/high, and 1-5 for high band as I recall. Hope it works out well :) cheers!</p>
<p>Oh perfect, thanks a lot!</p>
<p>This is my mark 1 prototype I had to use slightly different transmitter than featured in your video and I didn't change the original aerials . This is just the 1st mock up using an old board I haven't had a chance to build a box for it yet...but it works ! Thanks again.</p>
<p>Would this system also block 2.4Ghz RC remote controlls?</p>
<p>It very well could :(</p>
<p>Hello Andrew I am a mature student currently doing a 4th year honors end of year project based on the Internet of Things and the sensors that are used. To demonstrate how the signal may be interfered with by hacking and by other means, I am planning on building your jammer as part of my project. As I have no experience building anything like this I may have contact you for some advice when I start building it. I hope that is OK and look forward from hearing from you in the future.</p>
<p>Also, one thing I forgot to ask. </p><p>On this setup you manufactured the antennas yourself. Could you also <br>extract a set of 4 WiFi antennas (as you showed first) and use them <br>instead of having to make them yourself? Or would they not cause the <br>same noise effect as the DIY antennas?</p>
<p>Dear Sir,</p><p>How can we modify this circuit to work in bluetooth range ?? Appreciate your help and support.</p>
<p>Ok so you kind of skip electronic wiring part. Do you set each different module to a different channel? What if you set 2 modules to the same channel, would it make the wifi connection even worse?</p>
I've made! IT WORKS PERFECTLY!!!! It's amazing and incredible!! I can not belive when i see the signal lost from my laptop, 2 desktop and iphone. I've tried also to some friends of mine and i've saw thet the channel most used are 3 and 4 of the little circuit board. So i want to make a little one with only 2 circuit and a little lipo 3.7 volt..... <br>Thanks man you are the number one!!!
Nice video, i'm gonna try and build one myself, I always used an off the shelf video transmitter as instruction material, but you can only use one of four channels. There is one thing not correct though. The jammer does not overpower the wi-fi, it just uses al the airtime. <br> <br>
Same in the UK. Although it is a &quot;de-restricted&quot; unlicensed band, the equipment must be type approved and used correctly at appropriate radiated power. <br> <br>Intentionally blocking legitimate users of the band is not legal, even if the equipment being used to do it is.
Note that in the United States this is illegal depending on your transmitter power level, or if you are interfering with a licensed radio signal (we do have licensed users in the wifi spectrum here).

About This Instructable


164 favorites


More by andrew mcneil: 2 4GHz Yagi Antenna Yagi Antenna 5 8GHz Portable Folding Satellite Dish for FPV and WiFi
Add instructable to: