Off line Telephone tester


Posted on Feb 7, 2014

Off line Telephone tester. Here is a circuit of an off-line telephone tester which does not require any telephone line for testing a telephone instrument. The circuit is so simple that.


Off line Telephone tester
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    10 LEDS Audio level vumeter
    Ac-To-Dc Converter
    1000W Power Inverter Circuit
    FM transmitter circuit diagram
    30 Watt Audio Power Amplifier Schematic
    Light Tracking Servo System
    AVR ISP programmer In-System Programmer
    A sound and light control energy-saving switch circuit
    12kHz IF signal generator circuit diagram



    Top