Re:Hacking together a USB-C charger for a cheap Chromebook
by MrBuddyCasino on Monday October 12, 2020 @02:15PM
(#24757528)
Oh that is good to know! I measured 20V/3,?A on my barrel jack adaptor, now wondering if it can actually do 5A as advertised. Is there a way to query the cable for what it will actually report as supported voltages / current?
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Re:Hacking together a USB-C charger for a cheap Chromebook
by baybal2 on Monday October 12, 2020 @04:57PM
(#24759355)
Easiest way is to get a PD tester. The hard way: page 363 https://usb.org/sites/default/files/USB%20Type-C%20Spec%20R2...
Re:Hacking together a USB-C charger for a cheap Chromebook
by MrBuddyCasino on Monday October 12, 2020 @06:29PM
(#24760208)
Did some more research. I don't have a linux system with usb-c rn, but one can maybe query the emarker VDO in sysfs: https://people.kernel.org/bleung/
On windows there are the MUTT tools, but looks cumbersome: https://docs.microsoft.com/en-us/windows-hardware/drivers/us...
Re:Hacking together a USB-C charger for a cheap Chromebook
by MrBuddyCasino on Tuesday October 13, 2020 @06:52AM
(#24764229)
Found a hardware thingy that can display CC1/CC2 emarker info.
https://www.youtube.com/watch?v=hMlySYTHbyk
https://www.banggood.com/POWER-Z-PD3_0-QC4_0-USB-Tester-Volt...