Old Phone Intercom


Posted on Feb 5, 2014

This Photo Instructable shows how to use two old phones as a cheap intercom between Point A and Point B.  Might be useful between the house and the sh..


Old Phone Intercom
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Ultra-Flanger guitar effect
    Automatic Tr Switch Circuit
    Knight Rider Circuit
    music in a chip
    integrated circuit Improving absolute precision of ADC to balance battery voltage
    ISL62386 High-Efficiency Quad Output System Power Supply Controller for Notebook Computers
    Pulse width / voltage conversion circuit composed of TL082
    4-input mini Logic Analyzer
    REMOTE TV VOLUME CONTROL
    Aikido octal mono PCBs and 5687 PCBs and Aikido and 300B amplifiers
    Relay protection circuit



    Top