NFC Technology: How 'Tap to Pay' Works
You tap your card. Beep. You paid. No battery in the card. How? Magnetic Induction powering a tiny chip.
You tap your card. Beep. You paid. No battery in the card. How? Magnetic Induction powering a tiny chip.
How does your phone charge without a wire? Induction. Understand the physics of magnetic fields and why we don't use it for robots (yet).