this post was submitted on 26 Jul 2024
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cross-posted from: https://lemmy.ml/post/18426215

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[โ€“] [email protected] 59 points 1 month ago (4 children)

Definitely not new. This is how RFID tags work. They harvest energy from the transmitter to power the circuitry in the tag to send back a response.

[โ€“] [email protected] 6 points 1 month ago

Tap-to-pay on credit card chips, too.

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