Using VBA, it also communicates to an attached Arduino, which is itself programmed to act as a disk drive for the Commodore. The neceessary configuration needed to interface with the Arduino is ...

Adam Podstawczynski has created a new Arduino powered project which is capable of emulating a Commodore 64 keyboard on a modern PC, enabling keystrokes to be translated to character inputs on a C64.

The C64 is able to display the state of the LED, relay and servo outputs, as well as read the Arduino’s button and potentiometer inputs.

Another interesting project where a Raspberry Pi is used with an Arduino - restoring a Commodore 64 for some retro gaming, with also a little LEGO help.