Ask Hackaday: What to do with a home intercom system?

intercom

[Kyle] just moved into a new home, a 1970s abode that was very modern for its time. When the house was built, a home intercom system was installed. Of course this intercom system was eventually disconnected, but now [Kyle] would like to find a use for it.

The intercom system is a wonderful piece of engineering from the late 60s … Read the rest

Apartment entry morse-code lock

[Bozar88] lives in an apartment building that has a buzzer at the front security door. Guests find your name on the panel next to that door, and press a button to ring the phone just inside the entry of each apartment unit. He decided to extend the built-in capabilities by adding a morse-code entry password which unlocks the security entrance Read the rest

This toy intercom system is way better than a pair of tin cans and some string

toy-intercom-system

On his blog, [Kenneth Finnegan] recently showed off a replica of a fun toy he used to play with as a kid, a telephone intercom system. The setup is pretty simple, requiring little more than a pair of analog phones, a battery, and a resistor.

The phones are connected to one another using a standard telephone cable, but [Kenneth] uses … Read the rest