arduino power

when i have to use power plug of arduino that i recevied with arduino because now i power arduino with usb thanks very much

What ? :astonished: :astonished:

(deleted)

I guess he means whether to use power plug or USB..

If I understand the question, I will say that, for example, when you have some application that don't need to be connected to the PC to work, you can use a power plug different from the USB.

ok thanks