RFID emulator card includes a learning mode


This RFID card has a lot of nice features. But the one that stands out the most is the ability to learn the code from anther RFID tag or card.

You can see that the board includes an etched coil to interact with an RFID reader. This is the sole source of power for the device, letting it pick up enough induced current from the reader to power the PIC 12F683 seen on the upper left of the board. The underside of the PCB hosts just three components: an LED and two switches. One of the switches puts the device in learning mode. Just hold down that button as you move the board into the magnetic field of the reader. While in learning mode a second RFID tag is held up to the reader. It will identify itself and the emulator will capture the code sent during that interaction. This is all shown of in the video after the break. We wonder how hard it would be to make a version that can store several different codes selected by holding down a different button as the emulator is held up to the reader?

If you want to build your own card reader too here’s a project that does it from scratch.


  1. nice but when it can do HID 125Khz tags then I will be impressed. EM4100 and similar formats are relatively easy to spoof.

    • AS says:

      Haven’t quite grokked all the code yet as it’s assembler and the comments are half-spanish, but it looks like it should be able to do the HID tags as well but codes it differently.

  2. Chris says:

    Hmm.. sounds like a good way for someone to steal information or access something if they want.

  3. chango says:

    I love how simple this is, and I’m now thinking about building my own.

    One question though: what’s up with his voltage regulator? Wouldn’t it make more sense just to throw the zener across the coil with a small series resistor instead needing the transistor as well?

  4. jpnorair says:

    You could probably get superior antenna performance just with the outer loops. The inner ones are mostly parasitic. In RFID cards, they use them for impedance matching, but you don’t have that issue.

  5. jeicrash says:

    Skylander spoofer?
    Nice project, hope they keep building to include more features.

  6. Gdogg says:

    Awesome. All all with just a 12f683! I have about a dozen of these at home.

  7. Ryoku says:

    if its that easy I need to take one on the bus with me to clone some year passes =P

  8. spiralbrain says:

    Now this is Awesome! one of the best RFID diy I’ve ever seen.

  9. DanielT. says:

    This is an EXACT copy of this other project:


    He just changed the name of the original author.

  10. deff says:

    sorry but in france every acces in on 13M so 125kh are worthless. Better lurking on opcd, because I don’t think his solution will scale well with hf .

  11. BotherSaidMayans# says:

    having the reader parked near the scanner to record a legit tag would be just plain badass ™

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