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:
