Post #3289081

2026-06-07 18:11 UTC

@grumpybozo@toad.social @niconiconi@mk.absturztau.be but wouldn't higher current "fry" the device? Or is it ultimately controlled by the device, and it just doesn't request more power when the resistors are absent?

Replies (2)

@grumpybozo@toad.social 2026-06-07 18:23

@isagalaev@mastodon.social @niconiconi@mk.absturztau.be The current is still limited, it’s just not limited as much as it would be without the resistors, which are a passive indicator. The voltage is still just 5V so there’s no risk of anything being fried.

Open ##3289082
@niconiconi@mk.absturztau.be 2026-06-07 18:28

@isagalaev@mastodon.social @grumpybozo@toad.social To simplify, the power supply is an ideal voltage source and maintains a constant supply voltage, the actual current consumption is entirely controlled by the device via Ohm's law, the usable current is in principle infinite. The so-called "output current of a power supply" is better named "It will maintain the illusion of an ideal source, up until this point." When the current consumption hits that limit, the supply voltage collapses (and the power supply becomes unusable for that device, if the device is completely passive without any controller to reduce the current consumption).

Open ##3289084