What is Nostr?
Ken Shirriff /
npub1mgq…sjel
2024-06-23 16:01:52
in reply to nevent1q…akaf

Ken Shirriff on Nostr: The card doesn't transmit a signal back. Instead it changes its antenna load, causing ...

The card doesn't transmit a signal back. Instead it changes its antenna load, causing the card to absorb more or less energy from the reader. The reader detects this "load modulation", allowing it to receive data from the card without the card using power to transmit data. 6/15

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