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I remember playing with an old device as a child at my grandparents' place, it was similar to a walkie-talkie but transmitting using the mains power instead of
by nicolaslem 3y ago
I remember playing with an old device as a child at my grandparents' place, it was similar to a walkie-talkie but transmitting using the mains power instead of RF. It was supposed to plugged to a socket and hanged on the wall. It was made exactly for the use case you describe, as an intercom between rooms. It even had a button to ring a bell in another room.
- hiatus 3y agoThese still exist, you can buy them on Amazon. [1] I figured these had to exist as I recently saw a device to make a lan using mains circuits. [1]: https://a.co/d/31rKR02 https://a.co/d/31rKR02