This took a very long time to reverse engineer. It has a lot of discrete components, and fortuitously no microcontroller. That means it can be made to work without a need for a serial data connection.
https://www.youtube.com/watch?v=4gPXrbC7XSA
Phil Collins
2023-05-09 11:42:31 +0000 UTCiamdarkyoshi
2023-05-09 08:41:44 +0000 UTCCurtis Hoffmann
2023-05-09 05:18:25 +0000 UTC