3 ms·
Get this sometimes on my pixel 4a if I am out and its raining heavily. It also disables the USB until its no longer wet. I haven't looked into how it works, bu
by nibbleshifter 4y ago
Get this sometimes on my pixel 4a if I am out and its raining heavily. It also disables the USB until its no longer wet.
I haven't looked into how it works, but I guess it senses a short across some of the pins inside?
Useful feature to prevent the phone cooking itself.
- mbrndtgn 4y ago>[...] but I guess it senses a short across some of the pins inside? Most lithium ion chargers have (or should have) some kind of short circuit protection. It would make sense that the internal charging unit could make this information available to the operating system.
- joezydeco 4y agoMost USB ports have a chip between it and the host controller for electrostatic discharge (ESD) protection. The nicer ones can also sense shorts and overcurrent on the lines and signal the processor that something is up. Example: https://www.maximintegrated.com/en/products/power/protection-control/protection-ics/MAX4987AE.html https://www.maximintegrated.com/en/products/power/protection...
- lagrange77 4y agoMaxim integrated really has a chip for everything
- joezydeco 4y agoAnd availability for nobody, even before the pandemic. I always cringe when someone specs Maxim. It's impossible to get eval kits.
- glmeece 4y agoMy wife was at a meeting, and a friend's kid spilled water all over the table they were sitting at (her phone was sitting on the table). Same thing - Pixel 4a indicated it wouldn't use the USB-C port until water or debris was removed. I used a Q-tip a few hours after the fact (she had cleaned it to the best of her ability), and that seemed to do the trick.