recently i used Arduino Nano for my Persistence Of Vision project.
Every time i plug in the board ,neither the IDE nor PC recognize my board. Even in the tools>port i cant find NANO.
So,is it any fault in my PC or the IDE.
thanks in advance. 
Driver, cable , PC. If PC do not see the Arduino how the IDE could see?
Which OS?
Or .. Chinese NANO needing a CH340 driver...
For your convenience (if your ...duino has a CH340.. on board):
On this site you will find the suitable CH340 driver for your OS.