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Cell phone as a 2 way intercom

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  • December 1, 2013 at 7:36 pm #2748
    Riaan
    Participant

    HI all.

    I want to use a old Nokia 1200 as a door phone, the speaker part is easy to build but to get audio back to the phone is a problem. It seems as some thing is clamping / clipping the signal from my pre amp. Any ideas would be helpfull

    Regards
    Riaan

    December 2, 2013 at 5:32 am #10687
    AJISH ALFRED
    Participant

    Hi Riaan,

    This is interesting, please post your circuit diagram so that we can discuss more about what exactly the problem could be.

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