The house we just bought has this exact system in it and it still works in about 50% of the rooms.
Anyone ever tried something like this?
https://hackaday.com/2016/01/29/pimped-out-70s-home-intercom-system-now-with-more-pi/
Anyone ever tried something like this?
https://hackaday.com/2016/01/29/pimped-out-70s-home-intercom-system-now-with-more-pi/