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20262 articles
How NFC Works: Tap-to-Pay and Tags Explained
Near-field communication swaps small amounts of data between two coils held a few centimetres apart, and powers passive tags with the reader's own radio field.
How Bluetooth Works: Hopping Channels and Pairing Devices
Bluetooth links nearby devices over a shared radio band by hopping between channels. Here is the difference between Classic and Low Energy, and where the name came from.