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It is inevitable for students to use currency to buy things in school life, but carrying a large amount of cash on them takes up space and is not safe. At the same time, there is often change in the process of buying things, which also gives students Bring some trouble. In order to improve this phenomenon, the campus all-in-one card came into being.

In addition to the campus card, the IC cards we usually use, mall shopping cards, etc., are based on the same principle.

The campus card is an important manifestation of the perfect application of electromagnetics. Its inside is a non-contact IC card. This IC card uses radio frequency identification technology, that is, an induction coil and an integrated circuit chip are installed inside the IC card.

But in order for the IC card to work normally, an external card reader is needed, which is what we know as a credit card machine. The main function of the card reader is that it will emit pulses with the same natural frequency as the IC card. When the campus card is close to the card reader, it will generate electromagnetic, and the induction coil will resonate, which will prompt the chip to work.

Many small solenoids we produce are used in card readers. Using the principle of electromagnetics, when power is applied, the coil generates magnetic force to drive the push rod to move, and the command is triggered. When the power is off, the magnetic force of the coil disappears and the push rod returns by spring , And then end the instruction.

Nextcore is a solenoid & Electromagnet manufacturer in China. We are very interested in all electromagnetic applications that can improve people's lives. The solenoid valves we produce have made great contributions to life automation, industrial automation and office automation. Now, Let's take a look at the application of electromagnetics in campus life.