I have a requirement in which I need to power Arduino nano with external 5V from an LDO.
I got this material([Power Arduino Nano with an external power supply]
A new requirement came such that we need to power using an external 5V supply and use USB communication at the same time.
This says that if you are connecting an external 5V to the 5V pin of Arduino Nano you can connect a Schottky diode at the output of the external 5V regulator.
My question is if we power from an external 5V regulator with the help of a Schottky diode how Arduino determines which source to take.
Below is my schematic.' ARD_5V_IN' is the external 5V supply to Arduino.