• scarilog@lemmy.world
      link
      fedilink
      English
      arrow-up
      0
      ·
      3 days ago

      This method uses magnetic resonant coupling (vs inductive which is how wireless charging works on your phone). The difference is the transmitter and receiver are both tuned LC circuits that operate at their resonant frequency, which is why this works over the impressive range shown in the video. It would have efficiencies around 80% mark based on what I could find. But yeah for RFI, this would definitely be worse than something like normal Qi charging, which operates in the 100s of KHz, while this operates in the MHz. But I think the manufacturers page says this is FCC certified? So might be not too bad.

      • cmnybo@discuss.tchncs.de
        link
        fedilink
        English
        arrow-up
        0
        ·
        3 days ago

        FCC emission requirements are very lax below 30MHz, so something can pass FCC part 15 yet still jam the entire HF band.

    • Joelk111@lemmy.world
      link
      fedilink
      English
      arrow-up
      0
      ·
      3 days ago

      My speakers at home hum due to my Logitech Powerplay Matt, even with a ground loop isolator. It sucks. I was kinda surprised that it wasn’t an issue with this setup.

    • Ek-Hou-Van-Braai@piefed.socialOP
      link
      fedilink
      English
      arrow-up
      0
      ·
      4 days ago

      Efficiency and outright performance isn’t always a priority.

      A lan cable outperforms a wireless Internet connection in every way, yet most people just use WiFi

      • Ghoelian@lemmy.dbzer0.com
        link
        fedilink
        English
        arrow-up
        0
        ·
        3 days ago

        Sure, but I’m not paying for every byte sent overy network, while I am paying for every kWh I use.

        That’s all beside the point though, this is just a fun diy project so who cares really.

        • Ek-Hou-Van-Braai@piefed.socialOP
          link
          fedilink
          English
          arrow-up
          0
          ·
          3 days ago

          I could argue that WiFi uses more power than LAN cables, so you’re paying to use WiFi

          The important thing is if it’s worth the price, paying 5$ extra per month in power might be worth it for a LOT of people

    • KairuByte@lemmy.dbzer0.com
      link
      fedilink
      English
      arrow-up
      0
      ·
      4 days ago

      I doubt anyone is under the impression that it is going to be as efficient as direct power. At least no one paying attention.

      • Somojojojo@sh.itjust.works
        link
        fedilink
        English
        arrow-up
        0
        ·
        4 days ago

        Downvotes be damned: you’re right, imo. A wire just has less to worry about, and I’m sure most people would think the same. Most people.