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Published 20 hours ago • verified publisher icon Xinyuan-LilyGO

Powering from 5V pin whilst debugging via USB

Open ntsewell opened this issue 2 years ago • 5 comments

Hi! We are developing a product around the LilyGo-T-PCIE board and wish to confirm whether it is possible to power board from the 5V pin whilst at the same time having the USB-C connected to a computer for debugging / monitoring. Given the dev nature of this board it would seem sensible to be able to do this, but we want to confirm.

Thank you!

ntsewell avatar Apr 25 '22 12:04 ntsewell

Based on the last page of schematic https://github.com/Xinyuan-LilyGO/LilyGo-T-PCIE/blob/master/schematic/T_pcie_v1.1.pdf there are no protection diodes, so no.

randybb avatar Apr 25 '22 12:04 randybb

That's what we thought too... shame, it would be a useful and very cost effective addition! Thanks Randy.

ntsewell avatar Apr 25 '22 12:04 ntsewell

As @randybb says, it does not have protection diodes, maybe it works to place them on the usb cable and on the power supply. something like that: sources_diodes .

I got the image from this page:

maybe one day I'll try it in the meantime I'll keep disconnecting the source to connect the USB on the board.

carlosprato1 avatar May 29 '22 23:05 carlosprato1

Hi! We are developing a product around the LilyGo-T-PCIE board and wish to confirm whether it is possible to power board from the 5V pin whilst at the same time having the USB-C connected to a computer for debugging / monitoring. Given the dev nature of this board it would seem sensible to be able to do this, but we want to confirm.

Thank you!

I do it often with no problem. I use a laptop connected to the same electrical circuit as the esp32 power source, or use the laptop unplugged (battery only).

mereshow avatar Jun 18 '22 09:06 mereshow

Hi! We are developing a product around the LilyGo-T-PCIE board and wish to confirm whether it is possible to power board from the 5V pin whilst at the same time having the USB-C connected to a computer for debugging / monitoring. Given the dev nature of this board it would seem sensible to be able to do this, but we want to confirm. Thank you!

I do it often with no problem. I use a laptop connected to the same electrical circuit as the esp32 power source, or use the laptop unplugged (battery only).

I meant to say thank you for your comment about this - we also do this all the time now so it is safe it seems! :)

ntsewell avatar Jan 08 '24 17:01 ntsewell