OK thanks but from what I gather the LCD takes 5v from the 5v pin on say a Arduino Mega. If if feed that Mega board with 5v then why cant I just feet the LCD from the 5v power supply instead from the pin on the Mega board.
If this is so then It wouldnt no mater if I had a mini at 3v or 5v because I think I can feed the mini with between 3v and 12v so I could feed it with 5v and feed the LCD as well.Hope this is right.
I ordered the 5v anyway
The only thing is that the cable between the Pro Mini is going to be about 70 feet