Options to power the Arduino Nano include USB, VIN, ... You can use a 6V to 20V unregulated external power supply, ... If you're adamant about using 5V to power your Nano, the 5V pin is the way to go.

The Arduino Nano and Raspberry Pi Pico support different input voltages, so they also use different power sources. However, they can both be powered with a 5V supply via their onboard USB ports.

The most basic model in this lineup is the “Nano Every”, a 5V board with the ATmega4809 at its center. This brings 48 KB of flash and 6 KB of RAM to the party, running at 20 Mhz.

Four new Nano boards join Arduino's lineup. Written by Liam Tung, Contributing Writer May 20, 2019 at 6:10 a.m. PT. ... (I/Os) and should not be used for connecting to 5V signals. ...