I used an Arduino Uno and a protoshield instead of a Nano, only because I had a bunch of those on the shelf. Still a WIP and not as glamorous as the original. I've attached an 8-pin header because the original had it, but havent connected it because there's a protoshield on the back. I've done the solder connections to the shield so I can reuse the Uno if I need to. I will be fashioning some sort of a case - probably plexiglass/acrylic front and the same on the back with cutouts for the prototyping areas.
1601 LCD 16x2 Display
Arduino Uno or clone
Protoshield I'm using one from Eeloog
10K variable resister (for the LCD screen brightness adjustment)