New USB hub installed and running. Found a different power supply, plugged into the old hub, which seems to be still functional, so just the power supply was the problem. Need a way to check USB voltage outputs before putting it back in action... Maybe will slice open an unused/old USB cable, should have kept one of the bad ones around here. 馃 #electronics
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@ai6yr A USB voltage tester is an extremely handy thing to have in the toolbox.
@ai6yr (I'm assuming you're aware that open circuit voltage testing is only useful for USB-A; USB-C has to negotiate).
@mattblaze @ai6yr on the subject of USB-C negotiation, I recently saw this clever bench supply https://www.crowdsupply.com/centylab/pocketpd
@mattblaze @grwster That's cool!
@mattblaze Yeah, USB-A hub! From the looks of it, just a bunch of wires from the power supply, but there's a 12V to 5V conversion stage somewhere.
@ai6yr I find I use my $10 USB tester at least twice as often as my fancy multimeter. I recommend getting one with both A and C connectors (some are one or the other) and that shows current as well as voltage (most do).
@mattblaze @ai6yr
2002 Windows 馃槣 had device manager figures for USB total power draw in mA; internally showing what was allocated to different ports (you didn't have to drill too deep to be of use, and what was pooled together was sometimes surprising on laptops nearing the max -- also shown -- when keyboard and tracking device were lumped with others)
* it was no big deal, except you'd be hard pressed to find much else under the hood any more that would even qualify as "technical info"
@mattblaze I definitely need one of those!