Hacked Gadgets Forum

October 8, 2006

RFID Zapper

at 5:50 am. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks

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.”


Jan 2014 video, share experience tips, and benefits let know retin . Below reviews, comments by and a total...

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20 Responses to “RFID Zapper”

  1. Macaca Says:

    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?

  2. Chriszuma Says:

    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.

  3. Richard Ahlquist Says:

    Chhriszuma, youre right nobody would ever depend on some silly idea like rfid checkout!

    google is your friend

  4. Embolia Schizoide Says:

    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

  5. Greg Says:

    Can somebody draw an easier to read diagram, because the paint drawing in another language is a little hard to understand

  6. loblaws Says:

    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

  7. Velcro City Tourist Board » Blog Archive » Links for 10-10-2006 Says:

    […] 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) […]

  8. Nick Says:

    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.

  9. Aski Says:

    brilliant, this would come in handy at wallmart!

  10. Michael Edwards Says:

    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

  11. Ens Says:

    Hi Could I buy a RFID Zapper already made up. Tell me how much it will cost and I will send them the money.

  12. patrick Says:

    “# 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.


  13. sweet Says:

    Can you build an RFID zapper and sell it to me please?

  14. Adam Says:

    Actually grocers do depend on it. The wholesale grocery system is much more fragile than you might think.

  15. Adam Says:

    BTW I should know… I have worked for quite a few and they ALL have relied on this technology.

  16. William Gates, IV Says:

    Have any of you built one? I want to try this. The flash switch, what do you do with it? Just leave it permanently OFF? And the flash bulb – do you just pull this out? Please help – you can email me on checkthemansion[at]gmail.com < remove brackets and use “@”. Cheers bigears.

  17. tmmbach Says:

    rfid-zapper video:

  18. Privacy Part 1:Defeating RFID Technology | Big Flush Toilet Says:

    […] Here is an even more robust RFID zapper here. […]

  19. Ein Schuh für Schäuble » WDR markt neuer Personalausweis | Says:

    […] Die Bauanleitung […]

  20. jimnewbie Says:

    at 1. what inforfmations are stored on such rfid chips..(price,brand,coloretc etc… i don’know)
    so if a person equiped with such an rfid killer machine enters a shop and flashes a few articles what will be the result of these action when u arrive at the payment zone.? will the article be unreadable and someone will have to bring another one to,the vendor,i,don’t understand the utility of rfidchip BBQ in the stores ? where will it get interessant…

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