Multipurpose Circuit for telephone


Posted on Feb 7, 2014

Multipurpose Circuit for telephone. This add-on device for telephones can be connected in parallel to the telephone instrument. The circuit provides audio-visual indication of on-hook,.


Multipurpose Circuit for telephone
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    2W Amplifier
    Frequency counter up to 1MHZ
    Low-pass filter
    12V voltage doubler circuit
    Simple sine-wave generator has no low- or high-pass filters
    Recovery Node
    555 Timer Astable calculator for Astable Multivibrator Designing
    microcontroller 8051 rf tx rx encoder decoder
    reading electricity meter ir impulses
    Class push-pull tube power amplifier circuit diagram 2A3A



    Top