There have been plenty of Z80 computer builds here on Hackaday, but what sets them apart is what you do with them. [Andrew] writes in with his Z80 single-board computer made from scratch, using the… ...

They used the webaudio API to send serial data to a remote Arduino. The hack uses a FET, a capacitor, and a few resistors. They didn’t quite build a real modem with the audio.

News Wall-Sized Game Boy Plays Mr. Game and Watch Using Arduino By Kevin Lee Sep 26, 2011 9:46 am PDT [Photo: House 4 Hack] ...