I believe I've fried the usb controllers on three mega-r3's - I could use some advice about this, here's the scenario and - could this lead to frying something on the megas? On a mega shield I have a 12vdc-5vdc dc-dc convertor which is connected to the gnd and +5vdc pins on the mega's header. The c…

Mega-R3, Fried Usb controller chip?

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