the ncp349 chip used for overvoltage protection on the dc power input for
the beaglebone seems to do a good job of providing overvoltage protection.
Even looking at it's datasheet though, I'm not completely sure if it will
protect the board against reverse polarity.  (I'm not out to overtly or
purposely try this but I too have occasionally made mistakes...)

so should the beagle bone white/black be protected from application of
reverse polarity being applied, i.e. powering it with -5v instead of +5v,
by the ncp349 (or might it be a good idea to add a reverse polarity diode
across DC in that will pop the power supply & save the board.

Eric

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