5 ms·

> not truly reversible connectors What do you mean by that? USB-C connectors are not truly reversible? USB3 can also exist in USB-A and B variants that are ind

by est31 6y ago

> not truly reversible connectors What do you mean by that? USB-C connectors are not truly reversible? USB3 can also exist in USB-A and B variants that are indeed non reversible.

Black101 6y ago
a round connector that can be inserted in any orientation would be ideal... we can only dream
- InitialLastName 6y ago
  It's way past time for USB over TRRS.
- jaywalk 6y ago
  That would require a pretty long connector and a correspondingly deep port.
  - Black101 6y ago
    why would it need to be longer then a current USB connector?
    - jayd16 6y ago
      I don't think you can just take the current design and "make it round." You can't just put pins on a cylinder. They wouldn't align as you rotated the connector. The other way to do it would be co-axially like a headphone jack...but those are deep.
      - Black101 6y ago
        > I don't think you can just take the current design and "make it round." While you are taking the rectangle and turning it into a circle, go ahead and change the design...
    - spockz 6y ago
      Because it is a round pin, the only way to get more individual contacts is to make the pin longer. If you try to distinguish in another direction you could not rotate the plugs anymore. Edit: whoops had an old page open
  - toast0 6y ago
    We could use 2.5mm headphone jacks. TRRS would be enough pins for USB 2. Just need marketing to convince people that slower and less interference is good and valorous.
tech2 6y ago
Because of how the connector is laid out, it's possible for devices to not work (or to work differently) depending which way up you plug it in: https://twitter.com/mifune/status/1373564866443759617 https://twitter.com/mifune/status/1373564866443759617
- est31 6y ago
  Oh that, I remember seeing the video. Are there any real world devices that have problems depending on the orientation though? This one is just a demo meant to demonstrate that if you really want to, you could make usb-c dependent on the orientation.
  - toast0 6y ago
    I've got a Nexus 5x that now only charges if my USB A -> C cables are oriented properly. When it was new, it would charge in both directions as expected.
  - tech2 6y ago
    Perhaps not, I suspect that the pins are probably normally tied together. That it's possible, and some of the failure modes are _weird_ is a bit frustrating.
  - seba_dos1 6y ago
    Yes. Early USB-C controllers had notorious issues with CC pins getting fried out by short-to-Vbus events, which could make the port work only in one orientation (or not work at all if you're unlucky enough to fry both CC pins).
  - dbmnt 6y ago
    I bought this USB-C extension cable, and learned that it only works for USB debugging on Android when the Pixel's stock cable is plugged in the "correct" way. There's even a little label on the end of the extension cord telling you to reverse the connection if it doesn't work. /facepalm https://smile.amazon.com/gp/product/B071DMMW4J https://smile.amazon.com/gp/product/B071DMMW4J

by est31 6y ago

> not truly reversible connectors What do you mean by that? USB-C connectors are not truly reversible? USB3 can also exist in USB-A and B variants that are indeed non reversible.

Black101 6y ago

a round connector that can be inserted in any orientation would be ideal... we can only dream

InitialLastName 6y ago
It's way past time for USB over TRRS.
jaywalk 6y ago
That would require a pretty long connector and a correspondingly deep port.
- Black101 6y ago
  why would it need to be longer then a current USB connector?
  - jayd16 6y ago
    I don't think you can just take the current design and "make it round." You can't just put pins on a cylinder. They wouldn't align as you rotated the connector. The other way to do it would be co-axially like a headphone jack...but those are deep.
    - Black101 6y ago
      > I don't think you can just take the current design and "make it round." While you are taking the rectangle and turning it into a circle, go ahead and change the design...
  - spockz 6y ago
    Because it is a round pin, the only way to get more individual contacts is to make the pin longer. If you try to distinguish in another direction you could not rotate the plugs anymore. Edit: whoops had an old page open
- toast0 6y ago
  We could use 2.5mm headphone jacks. TRRS would be enough pins for USB 2. Just need marketing to convince people that slower and less interference is good and valorous.

tech2 6y ago

Because of how the connector is laid out, it's possible for devices to not work (or to work differently) depending which way up you plug it in: https://twitter.com/mifune/status/1373564866443759617 https://twitter.com/mifune/status/1373564866443759617

est31 6y ago
Oh that, I remember seeing the video. Are there any real world devices that have problems depending on the orientation though? This one is just a demo meant to demonstrate that if you really want to, you could make usb-c dependent on the orientation.
- toast0 6y ago
  I've got a Nexus 5x that now only charges if my USB A -> C cables are oriented properly. When it was new, it would charge in both directions as expected.
- tech2 6y ago
  Perhaps not, I suspect that the pins are probably normally tied together. That it's possible, and some of the failure modes are _weird_ is a bit frustrating.
- seba_dos1 6y ago
  Yes. Early USB-C controllers had notorious issues with CC pins getting fried out by short-to-Vbus events, which could make the port work only in one orientation (or not work at all if you're unlucky enough to fry both CC pins).
- dbmnt 6y ago
  I bought this USB-C extension cable, and learned that it only works for USB debugging on Android when the Pixel's stock cable is plugged in the "correct" way. There's even a little label on the end of the extension cord telling you to reverse the connection if it doesn't work. /facepalm https://smile.amazon.com/gp/product/B071DMMW4J https://smile.amazon.com/gp/product/B071DMMW4J