NFC MIFARE Card Emulator

This is a card emulator based on two standard chips (LM311 and 74HCT393). Two transistors and four diodes - all together not more than 2$. The controller is a STM32F405, but the whole family can be used (F0 to F4). Since the reception of the Miller code and the Manchester modulation is done via DMA, the controller load is less than 5%. It emulates MIFARE DesFire, Classic and Ultralight. The NFC transport layer is implemented. With this it can be used to communicate with an Android based Smartphone.