Any reason why I feel the PTC getting hot on a UNO using a 12Vdc external supply? The board works with the external supply but the heat worries me. Isn't the PTC for the USB?

PTC hot External power

michaelshiloh August 24, 2012, 11:23pm 2

I agree, that seems wrong. Could there be a piece of metal stuck in the USB socket?

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