I made a Arduino sketch for controlling two Wii nunchucks almost four years ago. Even now It's video uploaded in YouTube still gets a little view count. Recently, I received a requirment of this sketch to show its schematic. So I upload it here.
If you want to make same sketch, you need a Toshiba's CMOS logic IC TC4066BP. You can download its software (for Arduino and PC) from GitHub.
