DC 5V adapter polarity

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1

Hi,

My queuestion is about the DC 5V power jack of beagle bone black.
Is the outer part of the power jack is ground or 5V?
DC 5V power adpater which I would purchase has an option for the polarity.

Thanks in advance

J.Hwan Kim

2

Center positive, as described in the System Reference Manual and a shown in the schematic. Outside ring is ground.

Gerald