Timeline for Can or should I tie wall brick ground to battery ground?
Current License: CC BY-SA 4.0
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| Dec 24, 2023 at 17:41 | comment | added | kbyrd | It's not all shown here, but I'm doing a few things with the arduino: 1) Measure AC present/off. 2) Measure SLA DC battery voltage (as a rough measure of capacity, I know this isn't great) 3) The USB advertises itself as a HID Power device so PCs and other things treat it like a UPS that gives status reports over USB. I wasn't going to go thru the trouble of a shunt and current monitoring, but that INA231 part is interesting! I might switch out to that in rev2, thanks! | |
| Dec 24, 2023 at 8:43 | comment | added | Justme | Ethernet does include transformer isolation for data. But if you take two desktop PCs and put a STP cable between them, the PC metal cases will be connected together through the cable. | |
| Dec 24, 2023 at 7:30 | history | edited | Jasen Слава Україні | CC BY-SA 4.0 |
added 213 characters in body
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| Dec 24, 2023 at 7:18 | history | answered | Jasen Слава Україні | CC BY-SA 4.0 |