First off I have only very basics of electronic understanding, so I welcome any help that I can get. I have a Raspberry Pi that is powered off of the GPIO pins (yes I have read that this is bad and can fry the board). I still need the GPIO functionality but would like to power it externally - can I use the micro-usb port and feed it the required 5v? By this I mean using one of those wall adapters to micro-usb units.
If I use the micro-usb port, I guess I would need to cut the power feeding the GPIO pins at the 5v level. What about the 3.3v pin?