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Electronics/Hardware Development :: RE: Telephone Intercom (Schematics included!) (Easy)

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Author: Tom
Posted: 30 Nov 2012 01:27:08 am (GMT -5)

elfprince13 wrote:
This is quite nifty. What inspired you to build it?

The idea of having to pay the phone company when i am just calling my friend at the 3rd floor next door. So i threw a phone cable from my balcony to his and he hooked it up to his phone. Since the phone only uses 2 of the 4 wires in the phone like i hooked up a 2 way buzzer circuit on the outer 2 wires so we can sort of ring each others phone.


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