The barrel socket needs 6.5- 7V to give a clean 5V for the Arduino and other components to work with.
If you have a 5V power supply it should be connected to the 5V pin NOT to the barrel connector.
Steve
The barrel socket needs 6.5- 7V to give a clean 5V for the Arduino and other components to work with.
If you have a 5V power supply it should be connected to the 5V pin NOT to the barrel connector.
Steve