I hope everyone enjoyed your thanksgiving weekend and for the rest of the world I hope your weekend was just as pleasurable. Usually on holiday weekends I like visit my local movie theater and check out the latest holiday movie. This year I had the pleasure of some idiot that just had to answer his cell phone while we are all trying to enjoy the movie. After people told him to be quiet multiple times he finally walked out, talking the entire way out of the theater. So I got to thinking, why doesn’t the theater block cell phone calls, hospitals do! Probably a safety concern and since you are already at the hospital it doesn’t matter.
After doing a little research when I got home I found this little treasure. A DIY Cell Phone Jammer that I can fit right in my pocket. Now I can block cell phones around me and if there is an emergency I will just turn it off and no one will be none the wiser.
The Cell Phone Jammer is really just a RF jammer that can be built as a DIY project from Adafruit’s Wave Bubble. The Wave Bubble calls itself a self-tuning, wide-bandwidth portable RF jammer.
Self tuning is via dual phase lock loops which nullify the need for a spectrum analyzer. Multiple programmable frequency bands make it work across a range of RFs. Tuned antennas give it a range of 20 feet. Output power is .1W (in high bands) and .3W (in low bands). Two hours of jamming work over dual frequency bands (as used by some cell phones) with a rechargeable internal lithium-ion battery should be enough for your dirty deeds. Or you can get more hours over a single band as used by cordless phones, GPS, Wi-Fi or Bluetooth. All this can be crammed in a palm sized cigarette pack. That’s about 7″ x 4″ x 3.2″.
The Wave Bubble site backs-up the project with details under Share-Alike so go ahead and make yourself one. As the site warns, this is advanced stuff asking for lots of circuitry savvy.
Note: Using a RF Jammers to block communication by disrupting the signal is an exclusive right of the authorities. Among other things they are extensively used to prevent remote activation of explosive devices by terrorists. Federal Communications Commission (FCC) rules apply and they take a dim view against illegal use of RF jamming devices.
[ Cell Phone Jammer via HacknMod and Wave Bubble ]
