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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

intercom

  1. J

    Aviation headset test circuit - op amp

    I have put together an overly complicated headset tester with hopes to expand it to a intercom station. But it doesn't work as I wish. No mic audio is audible in the headset. I am using a standard aviation headset David Clark H3312 with a 600ohm load. Have I overlooked something very obvious...
  2. X

    Remotely open door by using same Intercom switch using remote Switch

    Hi, I don't have much knowledge about electronics but I have bought a remote switch using which one can remotely (100 meter distance) turn on/off a light or any other appliance. There is a two buttons "bpt" intercom in my unit. I want to use this remote switch with that intercom such that...
  3. J

    Replacing mini electret mic with a headset

    Hi, I've been building an intercom circuit based on the design by colin55 found in this thread: https://www.electro-tech-online.com/threads/lm386n-1-elecret-mic-amp.121819/#post-1004570 **broken link removed** I was wondering how it would be possible to replace the miniature microphone with a...

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