I found in a documentation that Nano (v3) can run at anywhere from 1.8 to 5.5 V (for 16 MHz, we only need 3.78 V) when inputted through the +5-V pin, so I powered up my Chinese knockoff Nano from a ...

The Arduino Nano itself is the most basic and oldest of the group, and just like its many iterations, it's designed to work primarily with breadboards, making it a great tool for prototyping.