I've not yet removed the diode, but otherwise I'm powering my BBAI using a 5V/3A power supply (from OKdo) through pins P9.1+2/5+6. I read in some topics (like https://groups.google.com/forum/#!topic/beagleboard/Tx9pGjJPZ0A) that one might need a beefier supply or added cap if not powering thru the usb connector, though I'm not sure if this applies to BBAI, too.
On Friday, July 3, 2020 at 5:25:23 PM UTC+2, [email protected] wrote: > > I connected pin1 to GND and pin5 for VDD_CAPE > > As pins 5 and 6 are connected on the PCB I did not see it necessary to > connect power to both pins. > > have you successfully self powered one of these boards? > > On Thursday, 2 July 2020 19:23:24 UTC+1, [email protected] wrote: >> >> Do you use pins 5&6 (VDD_CAPE_5V) to power the board? >> >> On Thursday, July 2, 2020 at 7:51:08 PM UTC+2, [email protected] wrote: >>> >>> When i removed D81 power was present on VDD_5V but only at about 4.5V >>> which is I guess the voltage drop across D82. >>> >>> there was no voltage on VDD_3V3 and the device would not startup - even >>> after pressing the power on button. >>> >>> Has anyone solved this? >>> >>> On Wednesday, 1 July 2020 21:58:00 UTC+1, Adrian Hatton wrote: >>>> >>>> I have found D81 from the silk screen data. Will be removing and trying >>>> as a next step. >>>> >>>> [image: ASSET_BOT.PNG] >>>> >>>> >>>> On Wednesday, 1 July 2020 21:42:12 UTC+1, Adrian Hatton wrote: >>>>> >>>>> Hi Geza, >>>>> >>>>> I was wondering if you made any progress here? >>>>> >>>>> I took a look at the schematics myself and I agree that by removing >>>>> D81 you essentially disconnect VDD_TYPE C from VDD_5V. >>>>> >>>>> If you then apply 5v power to VDD_CAPE_5V it connects to VDD_5V >>>>> through D82 and should power the device. >>>>> >>>>> I assume you would then boot the device by connecting PWR_BUT or P9.9 >>>>> to GND. >>>>> >>>>> Have you tried this? Have you been able to locate D81 on the board? I >>>>> have downloaded the board.pdf but it is extremely difficult to find >>>>> specific components. >>>>> >>>>> Many thanks. >>>>> >>>>> >>>>> On Saturday, 6 June 2020 09:41:45 UTC+1, Geza Kuhmann wrote: >>>>>> >>>>>> Hi All, >>>>>> >>>>>> I'd like to make my BBAI so it could only be powered from the J9.5/6 >>>>>> pins, but *not* from the USB-C connector. >>>>>> On the other hand, the USB-C connector should stay functional as pure >>>>>> USB connection (using the BBAI as a USB gadget). >>>>>> >>>>>> Reading the schematic it seems to me that removing diode D81 would >>>>>> exactly do this, but not being a hardware expert, I would be glad if >>>>>> somebody could confirm this. >>>>>> >>>>>> Thanks, >>>>>> >>>>>> Geza >>>>>> >>>>> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/cffa21c9-e418-4786-9fe6-6c90f69660b3o%40googlegroups.com.
