Julian put together a plan for a RFID zapper, the information below was translated but reads not bad.
Project Page.
UPDATE: Julian was kind enough to send in a hand translated version. The text below has been changed accordingly. (Thanks Julian)
“This drawing represents schematically the circuit board of a disposable camera with built-in flash. Also, the necessary design changes are illustrated. Essentially, the “on-switch” (On-Schalter) must remain closed permanently, e.g. by a solder point. The switch for activating the flash (Blitz-Schalter) must be deacitvated and/or removed, as well as the flash bulb (Blitz-Birne). Now a coil with 5 windings of 1mm diameter enameled copper wire (Kupferspule) is connected to the capacitator (Kondensator) with two cables and a momentary switch (ZAP-Schalter). The little bulb (Bereit-Birne) that glows when the capacitator is fully charged can stay in place. But it is better to remove it and connect it with two extension cables again. So, it can be glued clearly visible under a hole in the case afterwards. Finally, the battery holder (Kontaktklemmen) gets removed and a recharchable battery (Akku) is connected to the contacts with cables and a switch (ON-Schalter). For convenience, a charging jack (Ladebuchse) can be added as well. I used a 3.5mm audio jack.
The contacts of the momentary switch used to discharge the capacitator into the coil can weld together due to the very high current. This problem disappeared after 6 or so activations.
An interesting observation can be made when activating the Zapper about 0.5” away from the metal lampshade of a anglepoise lamp. It produces a “ping” sound as if one flips the fingernail against it. This phenomenon indicates that the magnetic field of the Zapper should be sufficient to destroy any RFID- chip at close range.”
October 9th, 2006
This has some evil potential (besides the privacy protection related implications): what if supermarkets would introduce automated payement?
Like when you load your cart full of RFID enabled products, drive through a little gate which reads whats in the cart, and then bills you accordingly.
But now again, with the chips of half the goods ‘zapped’.. will that result in free stuff? Or will the chips be recognizable as being zapped?
October 9th, 2006
Your example is highly irrelevant because no such system exists. No grocer would depend on such a system because it would be much too unreliable. Now if you wanted to sneak out of a library with a reference book, that’s a different story.
October 9th, 2006
Chhriszuma, youre right nobody would ever depend on some silly idea like rfid checkout!
http://ubiks.net/local/blog/jmt/archives3/004580.html
http://www.youtube.com/watch?v=-ZYY85IyDNM
http://peterthink.blogs.com/thinking/2006/02/rfid_checkouts_.html
google is your friend
October 9th, 2006
Distruggere gli RFID
Un paio di link simpatici presi da Make Magazine: Distruttore di RFID mediante un forte impulso EM, ovvero l’ecoterrorismo del futuro. Versione tradotta da Google e trascrizione separata dell’autore: http://translate.google.com/translate?sourceid=mozc
October 9th, 2006
Can somebody draw an easier to read diagram, because the paint drawing in another language is a little hard to understand
October 9th, 2006
Richard .. haha nice..
we are starting to ship food with rifd in them in canadian stores.. walmart has been doing it for years.. we use the rfid more for shipping aspect, but soon i’m sure we’ll see more rfid enabled checkouts…
gotta remember this rfid zapper next time we have union talks.. heh
October 9th, 2006
[…] 9 - RFID Zapper Worried about the little extra in your new passport? Get a disposable camera, follow these instructions, and avoid having to answer awkward questions about the tinfoil linings of your pockets. (tags: howto deactivate destroy hacking zapper prevention fraud theft identity surveillance security tags arphid RFID) […]
October 10th, 2006
Most of the modern RFID transponders have diodes for over-voltage protection so this device will be useless. If you want to destroy and RFID tag, just throw it in a microwave oven. This will create currents everywhere, not just on the reciever coil, and will destroy the semiconductors.
October 12th, 2006
brilliant, this would come in handy at wallmart!
February 3rd, 2007
all diodes have a PIV reverse breakdown voltage, so you may need something better tuned to the rfid freq and send a higher energy pulse to zap the diode, I would guess it uses 2 diodes reverse biased to each other so the max voltage would be .65v - I’m guessing transferring 1000v inductively, or even winding your primary coil as a step up transformer when put next to the rfid coil, using a ferrite or iron core primary
November 13th, 2007
Hi Could I buy a RFID Zapper already made up. Tell me how much it will cost and I will send them the money.
January 12th, 2008
“# Chriszuma Says:
October 9th, 2006
Your example is highly irrelevant because no such system exists. No grocer would depend on such a system because it would be much too unreliable. Now if you wanted to sneak out of a library with a reference book, that’s a different story.
”
LOL.
January 24th, 2008
Can you build an RFID zapper and sell it to me please?
sweet_pink30@yahoo.com
September 30th, 2008
Actually grocers do depend on it. The wholesale grocery system is much more fragile than you might think.
September 30th, 2008
BTW I should know… I have worked for quite a few and they ALL have relied on this technology.