SNES Retropie System : 13 Steps (with Pictures) - Instructables
SNES to Parallel Port : 5 Steps - Instructables
How-To : Make a NES to SNES Adapter : 3 Steps - Instructables
Convert a NES Gamepad to USB With Arduino : 12 Steps (with
Portable Game Systems Explained (NES) : 5 Steps - Instructables
NES and SNES Controllers on a 6502 (like the C64) –
Convert a NES Gamepad to USB With Arduino : 12 Steps (with
Arduino NES : 26 Steps (with Pictures) - Instructables
Retro All-In-One Gaming Console : 12 Steps (with Pictures