• WaterWaiver@aussie.zoneOP
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    4 hours ago

    I just realised how hard it would be to manufacture this thing.

    Imagine having to bend those copper wires into that shape around an already-existing toroid ring. Or maybe they glue together a few pieces of ring?

    • WaterWaiver@aussie.zoneOP
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      4 hours ago

      In the picture are 3 coiled wires, all sharing the same dark grey ring/toroid (but it looks yellow because it is wrapped in yellow kapton tape).

      If you try and send the same signal through each of these 3 wires then they will all fight and cancel each other out (a bit like 3 people trying to through the same narrow doorway at the exact same time; no-one gets through). If the signals are different on each wire then they will get through fine (a bit like people going through a door at different times).

      common mode chokes = choke/kill the signals that are common/same on all wires

      You typically do not want common mode signals to exit your device and travel along wires, because then these wires act like radio transmitters. The exact reasoning for that is a bit more than I want to write here, but it’s best explained with some pictures and phrases like “you turned your cable into a monopole you doof, use more common mode chokes and think of England”.

      Internally these devices work using magnetism. I’m more familiar with 2-wire chokes where the coils are wound in opposite directions (so the magnetic fields they make cancel out), I am not sure how it works for 3 windings.

    • JiveTurkey@lemmy.world
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      13 hours ago

      A common mode choke is a passive electronic component that functions as a filter, blocking high-frequency noise that is “common” to multiple wires in a circuit while allowing the desired low-frequency signal to pass through, effectively suppressing electromagnetic interference (EMI) from unwanted radio signals or other sources within a system.

  • P00ptart@lemmy.world
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    12 hours ago

    Don’t lie, that’s a high power magnet from fallout 4. Worth 1 ceramic, 3 copper and 1 nuclear material. More if you have the scrapper perk.

  • jetA
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    14 hours ago

    That’s a component you can take home to mama!