Post #3289062
2026-06-07 19:13 UTC
@niconiconi@mk.absturztau.be @gsuberland@chaos.social @matildalove@wetdry.world @valpackett@social.treehouse.systems right, a USB-C power source doesn't supply *any* power by default, unless there are resistors
however, USB-C ports are required to tolerate being connected to something which *does*
> All USB Type-C ports shall tolerate being connected to USB power source supplying default USB power, e.g. a host being connected to a legacy USB charger that always supplies VBUS.
so connecting a legacy USB A charger to a USB C charger should not break anything (nor should connecting two USB C chargers to each other)
Replies (1)
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@r@glauca.space 2026-06-07 19:19
@niconiconi@mk.absturztau.be @gsuberland@chaos.social @matildalove@wetdry.world @valpackett@social.treehouse.systems ports which support USB PD (supplies "extra" power in addition to having a USB C connector) are also supposed to discharge any excess voltage when it detects a device unplug, as well as not even try to supply voltage if something "new" gets plugged in but there is too much voltage already getting this wrong (it's often controlled by software!) is probably the cause of a number of "i unplugged and plugged in some cables rapidly and then suddenly device started emitting smoke"