IC card made of PCB

As a student party, it is natural that we cannot do without various cards every day, such as the campus cards commonly used in schools. But the card in our school is very strange. In addition to the regular 13.56MHz passive card, it also integrates a 2.4GHz active chip, and a phone card adapter board is added to the lower part, so the whole thing is very thick. And it's heavy. A general IC card only weighs about 6g, but this card weighs as much as 22g, so it is very inconvenient to carry. So I came up with the idea of ​​making my own meal card. So, this project came into being

This card is not only thin and light, but also looks good. The silk screen content can be changed at will and replaced with your favorite pattern.

It should be noted that I did not add an LED light to this card like other pcb ic cards. The reason is that if an LED energy-absorbing coil is added, the signal will be attenuated. The card and card machine The distance must be correspondingly smaller to read and write the card.

The PCB of this card should be drilled to 0.8mm. The chip can be uid, cuid, fuid or other chips. Of course, you can also directly remove the chip of the original card, but it is not recommended. If you remove it for the first time, the chip may be damaged due to the technique. Therefore It is recommended to buy chips such as uid and solder them on (regardless of the positive and negative poles), and then use peripherals such as pn532 to write the card.