RFID tag emulation with an AVR

Some time ago, I read this article about using an AVR ATtiny85 microcontroller to emulate an EM4102 RFID tag, and today I thought of giving it a try.

I used an Arduino as an ISP programmer to program the ATtiny85 with this source code. The electronics used:

  • 1x AVR ATtiny85
  • 1x 10uF capacitor
  • 1x 22uF ceramic capacitor
  • 1x Home-made coil from toilet paper cardboard

Here are some pictures and a video from the result: