This is a card emulator based on two standard chips (LM311. NFC MIFARE Card Emulator. May 13, 2016 - The Android Smart Card Emulator allows the emulation of a contact-less smart card. The emulator uses Android's HCE to fetch process APDUs.
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.