Generally, CPU cards are used to take buses in cities. There are special bus cards, mobile phone NFC bus cards, and bus cards used with bank cards, which can be used as both bank cards and bus cards. At present, there is also a mobile bus card that is put together with the mobile phone SIM card. You can swipe your mobile phone on the bus, and you don't have to bring a bunch of pocket money when you go out.
Brief introduction of bus card
The CPU card refers to the integrated circuit card, and the bus card we usually use is one of the CPU cards. It is more convenient to use a bus card. You don't need to prepare change, just swipe your card in the car. Generally speaking, it is more favorable than small change. In many places, coins cost one yuan and credit cards cost eighty cents.
Bus IC card is a non-contact data card. It changes the induced current at both ends of the coil into DC through the inductance coil on the card (the inductance coil is also a coil made of copper wire) and through the function of the chip integrated in the card, and then merges a relatively large capacitor at both ends of the DC to keep the voltage at both ends stable, and then leads two wires from both ends of the coil to the chip as signal transmission lines. When approaching the card reader, the coil generates an induced voltage, which can transmit data between the card and an external database.