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Limitation 5V + USB

Posted: Mon Oct 28, 2019 8:17 am
by wilecoyote
Is there any limitation using +5V power supply and USB at the same time ?

I just connected the +5V when USB was connected and the board does not respond anymore... Only power supply does not show any light, only with USB power light is blinking...

I have already used this setup but by connecting USB, then power supply but not the contrary.

Thanks for your help.