If you have power on the barrel jack then connecting a 5V supply to the 5V pin ISN'T the same as connecting USB power. I could see how damage could occur if you did that.
When there's nothing on the barrel jack though, I don't see how...
If you have power on the barrel jack then connecting a 5V supply to the 5V pin ISN'T the same as connecting USB power. I could see how damage could occur if you did that.
When there's nothing on the barrel jack though, I don't see how...