5 ms·

Doesn't pass power? A huge chunk of the newer USB protocols has also been support for higher wattage faster charging.

dheera 4y ago
So put power? You can run fiber right alongside 50 amp high voltage cables if you want without any signal corruption issues whatsoever. For practical purposes they'd need just {fiber, 19VDC, GND}, and none of the schengens that USB-C has. No shielding issues, no signal corruption issues, nothing. And you could run it for kilometers.
- dTal 4y ago
  You need at least 5V DC for backwards compatibility with devices that expect that.
  - dheera 4y ago
    No, you don't. Get an adapter with a voltage converter, just like you would if you need to plug a 120V-only device in a 240V outlet. 120VAC outlets have not changed in 60 years and that's owing to the fact that they output just straight-up power, no negotiation BS.
    - cesarb 4y ago
      > 120VAC outlets have not changed in 60 years Where I live, 120VAC outlets last changed less than 20 years ago, with the adoption of the new NBR 14136 standard for plugs and sockets.
    - eternityforest 4y ago
      Voltage converters are big and not that reliable at the consumer level. Putting the power supply in something replacable is a good thing. Going from 19 to 5 would be an extra conversion step. Plus, 19v is too low. USB does 48v for the 240W mode. You could use more current, but then you are wasting copper and making connectors bigger and heavier. I used to not be a fan of negotiation but it seems that it's highly reliable these days, stuff isn't getting fried because of incorrect voltage selection.
cesarb 4y ago
Playing devil's advocate: a fiber+power cable makes some sense. The main thing which limits the cable length is the data wires, not the power wires (just notice how one of the main counter-arguments for "one USB cable to rule them all" is "the higher bandwidth passive USB cables have to be shorter and thicker").
- lazide 4y ago
  Fiber is far too fragile to deal with the abuse even babied USB cables put up with, unless you mandate some kind of semi-articulating steel conduit anyway.
  - dheera 4y ago
    So do it? Steel is cheap and recyclable.
    - eternityforest 4y ago
      It's also heavy and won't be recycled till we can landfill mine. Now your short cables need heavy steel and fiber just to make long cables possible. Or else you have to have fiber+high speed copper in one connector.
      - dheera 4y ago
        > won't be recycled Fine the shit out of people who don't recycle. Anything's possible if we put our minds to it.
        eternityforest 4y ago
        First you have to make it practical to recycle at all. We don't even have recycling for bottles and cans here.
        deleted 4y ago
        [deleted]

So put power? You can run fiber right alongside 50 amp high voltage cables if you want without any signal corruption issues whatsoever. For practical purposes they'd need just {fiber, 19VDC, GND}, and none of the schengens that USB-C has. No shielding issues, no signal corruption issues, nothing. And you could run it for kilometers.

dTal 4y ago
You need at least 5V DC for backwards compatibility with devices that expect that.
- dheera 4y ago
  No, you don't. Get an adapter with a voltage converter, just like you would if you need to plug a 120V-only device in a 240V outlet. 120VAC outlets have not changed in 60 years and that's owing to the fact that they output just straight-up power, no negotiation BS.
  - cesarb 4y ago
    > 120VAC outlets have not changed in 60 years Where I live, 120VAC outlets last changed less than 20 years ago, with the adoption of the new NBR 14136 standard for plugs and sockets.
  - eternityforest 4y ago
    Voltage converters are big and not that reliable at the consumer level. Putting the power supply in something replacable is a good thing. Going from 19 to 5 would be an extra conversion step. Plus, 19v is too low. USB does 48v for the 240W mode. You could use more current, but then you are wasting copper and making connectors bigger and heavier. I used to not be a fan of negotiation but it seems that it's highly reliable these days, stuff isn't getting fried because of incorrect voltage selection.

cesarb 4y ago

Playing devil's advocate: a fiber+power cable makes some sense. The main thing which limits the cable length is the data wires, not the power wires (just notice how one of the main counter-arguments for "one USB cable to rule them all" is "the higher bandwidth passive USB cables have to be shorter and thicker").

lazide 4y ago
Fiber is far too fragile to deal with the abuse even babied USB cables put up with, unless you mandate some kind of semi-articulating steel conduit anyway.
- dheera 4y ago
  So do it? Steel is cheap and recyclable.
  - eternityforest 4y ago
    It's also heavy and won't be recycled till we can landfill mine. Now your short cables need heavy steel and fiber just to make long cables possible. Or else you have to have fiber+high speed copper in one connector.
    - dheera 4y ago
      > won't be recycled Fine the shit out of people who don't recycle. Anything's possible if we put our minds to it.
      - eternityforest 4y ago
        First you have to make it practical to recycle at all. We don't even have recycling for bottles and cans here.
        deleted 4y ago
        [deleted]