Has anybody taken a look on NuTone musical door chimes? They were basically the ancestors of modern IoT craze (combining features of melody doorbell, digital striking clock with alarms and such things) and based on classic microcontrollers those certainly can be dumped and emulated.

NuTone Electronic Door Chimes
https://www.youtube.com/playlist?list=PLsTvqKsBnGYcS7_jKaTBCo7fg8QpCQlSW

http://northsideforyourhome.squares...dytime-electronic-chime-model-lbc55.html

Vintage NUTONE Musical Door Chime LB-55 26 Melodies Tunes Bell

An Overview of the NuTone LBC55 Musical Chime and Challenges of Repairing it

Troubleshooting and Repairing a NuTone LA52 Harmony Musical Chime

I don't own one, but in USA they have a big fanbase with repair companies selling expensive spare parts, so they are undoubtedly an important piece of microchip history worth to be preserved.

MAY THE SOFTWARE BE WITH YOU!

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