New to Arduino and have not found any explicit answer to this issue.
The Uno can be powered from a computer via usb or via Wall-wart (~9v) according to the write up on the Uno
Can I plug both sources into the Uno at the same time?
What I want to do is use the wall wart for the normal power and from time to time attach a computer to get updates/status from the Uno.
Thanks in advance for any advice.