May 25, 2012

Telephone Operated Calling System ECE Mini Project

This is a Electronics Engineering Mini project report on "Telephone operated calling system" and is used where persons have to be called or signaled. When you need to call a person amongst many standing outside a cabin, just lift the telephone handset off the cradle and press the respective number. The number of the person called will be displayed and a bell will sound to inform the person that it is his turn. You can also Subscribe to FINAL YEAR PROJECT'S by Email for more such projects and seminar.

Telephone operated calling circuit converts DTMF signal to its binary equivalent. This circuit consists of a DTMF receiver IC which converts a DTMF input signal in to its binary equivalent. This circuit is very useful for doctors for calling patients, in banks and in various other situations. This report includes circuit diagram, block diagram, PCB Layout, full working and Component list for reference.

Author:- Midhun Varghese, Praveen J S & Renjith K S


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