I have an Arduino (genuine, not knockoff) Micro, which I have been using for two weeks in a development project. I noticed tonight that the 7805 regulator I was feeding it with got too hot to touch. Then the Micro board went dark, and the micro on it was too hot to touch.
I unplugged the board entirely from my circuit, and just powered it through the USB connector. In that mode, it powers up, the LED's light, but then in under a minute, it goes dark, again with a very hot microprocessor. Even after it is dark, the board stays warm, so there is some power flowing to it.
Has anybody had a similar experience with this board, or does anybody have an explanation for this?Thanks in advance for any insights.