• qjkxbmwvz@startrek.website
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      3 months ago

      Yeah, you can also find “crystal radio” kits — radio receivers that use only the received RF to produce sound (no external power source).

      • nondescripthandle@lemmy.dbzer0.com
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        3 months ago

        The article talks a lot about their rectifier and im guessing that’s where the ‘breakthrough’ is, but still I feel this is like too many of these articles where its a lot of hype for a little progress.

      • Sonori@beehaw.org
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        3 months ago

        This is also how passive RFID tags work, the tag harvests just enough energy from the scanning frequency to boot up a microchip and respond with its ID number.