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kahunas
Never had the need, I'm the guy with the new camera... Beside, the two of you put on such a nice show.
Seriously, since 2.4 GHz is a band, and there are a bunch of frequency choices for the cameras, you would need to jam the whole range. My little camera's reciever has a little tuning knob, most likely the exact frequency is unknown, or drifts a little. Why not get a similar camera to your friends, then you would know when they are playing, and where.
Just to really piss on you... they have cameras built into working pens, with a 4 gig DVR, no RF... $35-50. Also got the same thing, fits in a pack of gum.
These cheap cameras don't work in low light, so be green, and turn off the lights.
It is much easier to get a camera yourself, put in same room, catch the "spy" on tape putting the can in your room and then
- beat the c**p outta him
- report him to authority
- use your imagination
The 2.4GHz devices are quite imune to disturbances (that's the way they are built). Most of them jump from channel to channel when they detect problems etc, increase power if changing channel does not help, etc.... We were making the 141KHz, 27MHz, 900MHz, 1G2 and 2G4 jammers here for the university .. and that was *very interesting* ... you take a small camera+mic on 2.4G and start jamming the signal while monitoring ether with spectrum analyser ... you see how camera is jumping trough channels and then you see it increasing transmit power (while still jumping trough channels)... the jamming signal that actually blocked the camera disable WiFi in the home block and we got call from the airport (some 60Km away) to ask if we are "testing something again" (they had experience with us as we were making jammers for cell phones for the local theatres) ...
so, cohones or no cohones, it is illegal, depending on the country and "who you work for" you get yelled at or arrested for it .. the power of the jammer and width must be so high in order to "cover" a simple cheap camera that gets
- too expensive to make
- too problematic as it covers too big area
- easily detectable by police
Not to mention that this is not something you can easily build at home... In order to monitor the output frequency and width of the channel you need spectrum analyser, these do not come cheap. You need to worry about very "strange" things like how far the gnd plane is, what is the shape of the pcb trace, does the solder joint have "spike's" etc...
All in all, it is much cheaper to get a room in local motel for a year then to build this yourself. Not to mention the already suggested "turn off the lights" .. if they use IR cameras; the have to emit IR light, you can detect this in dark using a single cell phone camera (the IR light will be seen as normal white light on your cell phone camera)... now, this will not help you for the mikes
The operation of transmitters designed to jam or block wireless communications is a violation of the Communications Act of 1934, as amended ("Act" . See 47 U.S.C. Sections 301, 302a, 333. The Act prohibits any person from willfully or maliciously interfering with the radio communications of any station licensed or authorized under the Act or operated by the U.S. government. 47 U.S.C. Section 333. The manufacture, importation, sale or offer for sale, including advertising, of devices designed to block or jam wireless transmissions is prohibited. 47 U.S.C. Section 302a(b). Parties in violation of these provisions may be subject to the penalties set out in 47 U.S.C. Sections 501-510. Fines for a first offense can range as high as $11,000 for each violation or imprisonment for up to one year, and the device used may also be seized and forfeited to the U.S. government.
I meant to add the thought of constructing an RF sniffer, as it has been called. While it requires that you take the time to "sniff" for the transmitter it is simpler than a jammer by a long shot. As I understand it, a simple RF sniffer might be an antenna, amplifier, diode/meter to respond to nearby RF fields. I googled on RF sniffer and found a number of hits that look practical.
cmon andy, he is novice but he has cohonas
crazyking, you cannot build it - period. you ca purchase it and it will not work or you will get arrested. Donno what location you are at, there still might be places so far behind that cop's don't know what jammer is, but in real world, anything that can jam a 2.4Ghz camera will put you in jail in approximately 2 days... and if you, God forbid, use the jammer for illegal purposes, anyone who helped you can be in trouble....
so, trust me, having cohones have nothing to do with being able to make a 2.4GHz jammer that works.
Max Bialystock.Flaunt it Baby, flaunt it.