他们逼我做卧底

Three-card switching PCB IC card

Overview

The same as my last PCB IC card , this card also uses PCB as the coil (retaining the coil of the previous project), and attaches the chip of the card by itself. The biggest difference from the previous project is that it supports switching between three cards. , realizing the integration of multiple cards into one, eliminating the trouble of carrying multiple cards.

The peripheral circuit of this card is also very simple (in fact, it can be said that there is none). It only requires three 13.5MHz IC card chips and an 8-pin 3-position toggle switch to realize three cards in one. When using, turn the toggle switch Just hit the corresponding gear, which is not only beautiful, but also convenient, and can also be used to install X (erroneously)

However, it is worth noting that this project has not yet been verified, and has been handed over to JLC for production at a rapid pace. Although it can be used in theory, it is recommended to wait until it is verified before making the board.

Design Files

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Update:2025-05-16 00:24:22

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