Powering arduino nano

Using Arduino IDE 1.x
1

Hi!

I want to power an Arduino Nano, my whole project works using 5 Volts and so I have a 5 Volts power supply.
In the documentation it says I can power it with a 5V regulated external power supply (pin 27).

However, I see documentation about Arduino UNO and it says that the 5V pin is a regulated OUTPUT from the regulator on the board, and supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it.

The part of the regulator on both (Nano and UNO) boards seem to be the same or very alike.

Is it a bad idea to power the Nano with an external regulated 5 Volts power supply at pin number 27?

Thakns in advance!

2

Yes, you can connect 5V in the 5V line, no problem.

3

If you are using a very powerful power supply, a good recommendation is to use a fuse, which can protect your board in the event of a short circuit