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How can devices determine if a cable is plugged in without a device on the other end? Difference in resistance?
by PaulWaldman 4y ago
How can devices determine if a cable is plugged in without a device on the other end? Difference in resistance?
- peteradio 4y agoI'm not sure how it works in reality but in principle the cable could act like a jumper across two contacts on the computer's USB connector.
- cpcallen 4y agoThe connectors have chips in them which communicate with the device they're plugged in to. E.g.: https://www.cabledo.com/anker-usb-c-to-usb-c-2-0-100w-cable-teardown/ https://www.cabledo.com/anker-usb-c-to-usb-c-2-0-100w-cable-...
- cesarb 4y agoNot all cables have chips in them, only things like high-power (5A) cables need a chip. A basic 3A USB-C cable will not have any chip.
- mcv 4y agoIs there really nothing standard about USB-C?
- soneil 4y agoThey’ve done a stellar job of standardising the name. So many different cables & capabilities, one standardised name.
- mrguyorama 4y agoIf you wait long enough they'll try to rename WiFi as USB-C somehow
- doubled112 4y agoDoes USB-C suffer from the problems with interference that USB 3 did? Perhaps that could be harnessed into something more productive.
- fzzzy 4y agoIf there are two ground pins in the connector and the cable shorts those two ground pins, the connector could use the presence of continuity between those two ground pins to know a cable is plugged in but not connected to another device. Something like that.