supplying 5v power to Nano, which pin?

[steveh2112]

i have a regulated 5v supply from a BEC (battery eliminator circuit on an ESC) for my Nano, i know i cannot use Vin because that's 7-12V in, so i'm thinking directly to 5V pin, but i know that's only supposed to be used as a voltage out, but i don't see much choice other than a USB pin, which i think is exactly the same as the 5v pin anyhow.

your thoughts?

[jremington]

Use the 5V pin for 5V power input, as well. https://www.arduino.cc/en/uploads/Main/ArduinoNanoManual23.pdf

[alesam]

Yes, connect your power supply to 5V pin. But don't plug in a USB cable and power supply simultaneously. You may fry a Nano.

[steveh2112]

alesam:
Yes, connect your power supply to 5V pin. But don't plug in a USB cable and power supply simultaneously. You may fry a Nano.

i actually need to do exactly that while developing. do you really think that's a problem?

[CrossRoads]

A real Nano has a diode between 5V and the USB supplied power. So one should be able to connect 5V to the 5V pin, and the USB connector to a PC for serial comm's and not have an issue.

A clone, you'd need to investigate yourself.