![]() ![]() It's is estimated that between 30 to 50B smart cards are in circulation today. In the form of credit cards and SIM cards, smart cards are the most common form of IT processing power on the planet. 30 to 50B smart cards in circulation today The card reader (or mobile phone) brings the 3V or 1.8 voltage to activate the chip. It's used with a contact or contactless card reader (POS for payments, at the ATM, or even on your mobile phone). The circular metal contact is vital to connect to the chip below and activate the card electrically. It integrates a microprocessor, some memory, and some apps. Let's start with a definition: a smart card is a small portable computer, usually the size of a credit card, without a display and a keyboard.
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