09-13-2016, 10:00 PM
(09-13-2016, 11:48 AM)laser411 Wrote: Is there not a voltage regulator on the pine? Surely since this is a processor board it would need a stable and regulated power supply. Probably burned that out and can probably be replaced. If you can't figure it out, send it to me :-D
Yeah, problem is though that although the PMIC can handle a maximum of 7v input, there are probably other components in the power path that wouldn't. Plus, I doubt that was a 7v battery... it was probably a 7.4v (2 cell, 7.4v nominal), which if fully charged would have been 8.40v... which would blow the PMIC instantly... so that board would now a 95% dead PMIC, with just enough of it's regulation circuitry is going to power the LED, which promptly goes out when the PMIC is pushed to provide power to the SD card.
Unless you have a reflow station, and are willing to go replacing several surface mounts parts... I think that makes that board a good example of what not to do! :-O Much better to just buy another board... as there is no guarantee that the main CPU/memory/etc didn't get wiped out in the cascade failure of the PMIC...
