The author shares their personal experience of finding a retro gaming shop in Tokyo and buying an old SNES controller. They then decide to modernize the controller by making it compatible with their PC via USB. The author explains the hardware of the SNES controller and how it communicates with the console. They also detail the process of programming an Arduino board to read and relay button inputs. The Arduino is then programmed as a HID gamepad and connected to the computer. The author concludes by sharing their successful experience of playing Super Mario Kart with the modified SNES controller.
https://blog.chybby.com/posts/building-a-usb-snes-controller