1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice
Wasp

Simple Telephone Central Project

This simple telephone switching system is designed by Dr. Mustafa Kemal PEKER for training purpose

  1. Wasp
    This simple telephone switching system is designed by Dr. Mustafa Kemal PEKER
    for training purposes. All responsibility is belong to user. Schematic and code is
    under GNU public licence. Cannot be used as commercially. If you interested in
    with two or more subscriber models with DTMF, please contact to author.
    mkpeker@yahoo.com

    WORK

    1) System contains 1 subscriber and 1 central
    2) Central cannot call.
    3) When subscriber hangs up, Central rings.
    4) When central answers, ringing stops.
    5) Conversation ends when one side closes the phone.

    For simplicity you may use an old AT computer power supply which includes
    12v and 5v. Have fun.....

    View attachment 44280