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Making A Intercom System with parts around house. How can I get it to work? Answered

I want to make a 2 way intercom for my door so I dont have to get up and open the door when someone wants to talk to me. I have alot of parts I just need to know how I can make it work. So any Idea how I could make one? I got a microphone and I got plenty of speakers. Here is my preferred way I want it (If Possible). I want to be able to use my microphone to talk and have a speaker for listening, while on the other side of the door I want 1 speaker to be the Microphone and speaker with a button that switches between the microphone and speaker.


use two old phones connect them together and run power supply to it If i remember right it is AC not DC and you need about 40V


9 years ago

you should be able to directly hook the mic into the speakers, as long as you can build an lm386 amplifier. just do it twice, and hook a power switch on to the positive power lead to power down/mute the system.