Connect with us

Interfacing an Intercom system to a PC sound card

Discussion in 'Electronic Basics' started by Dan Burke, Sep 28, 2003.

Scroll to continue with content
  1. Dan Burke

    Dan Burke Guest

    I'm looking for some real basic audio circuit help. I have very little
    electronics knowledge.

    I have a Music and Sound System Intercom unit model MC111M. I would
    like to run the output signal from the Intercom system into the
    line-in of a PC sound card.
    I have no circuit diagrams and no clear understanding of how the
    circuit works.

    Anyone have any useful thoughts?

    If you're qualified and charge a reasonable rate, I'd condider
    contracting to have a MC111M room station modified to support an audio
    out that would be suitable for a line in run.

    Thanks
     
  2. Dan Burke

    Dan Burke Guest

    (Dan Burke) wrote in message
    Some more information:

    The speaker is 45 ohms (I guess that's standard for a commercial
    Intercom).
    The speaker acts as the mic too (also standard).

    There are 4 wires that run to the room stations. I believe 2 of them
    are the audio feed (red/green). When I put a volt meter on these I get
    a range of
    3 to 7 millivolts (.003/.007). I believe the other 2 wires are power
    and common ground (black and white). When I put a volt meter on these
    I get a near constant of 10.6 volts.

    The voltage seems very low compared to what I've read on this board
    from messages where others have tried to interface the speaker out
    from a stereo to a line-in.

    Thanks for any advice.
    Dan
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-