[Bruno]‘s Wii RetroPad Adapter was sent into the tip line, and we’re loving the possibility of using Playstation 2, Genesis, NES and SNES controllers with our Wii.
While there are commercial solutions that connect an NES or SNES controller to a Wii, everything connects to the GameCube port and there is no adapter for Sega or Playstation controllers. For his build, [Bruno] used an ATmega168 to read data from the classic controllers and translate that to the Wiimote I2C bus. Think of it as a new classic controller with the same form factor your 8-year-old self knew and loved.
The schematic for the build is very simple and [Bruno] has all the software out in the open. Even the PCB is single sided and looks like it would be a great candidate for a homebrew PCB. There’s no indication [Bruno] is trying to monetize his creation, so he’s either doing right, or so very wrong. Check out the Dualshock 2/Mario 3 demo of this board after the break.