NFC Contactless Card Process

Ever wondered how your contactless ATM or credit card works without any battery inside? In this video, we break down the complete process behind NFC (Near Field Communication) payments in a simple, visual, and engineering-friendly way. You’ll see step-by-step animations of: How the payment terminal creates a 13.56 MHz electromagnetic field How the card’s internal copper coil antenna harvests energy from that field How the chip inside the card converts that energy (AC → DC) using rectifiers and capacitors How the card sends data back using load modulation instead of its own transmitter How secure cryptographic data is generated for each transaction Why contactless cards can be battery-free, thin, reliable, and secure Whether you’re a student, engineer, developer, or just curious about how “tap to pay” really works, this video will give you a clear mental model of the entire process—from the physics to the protocol.