Friday, April 28, 2017

DTMF (dual tone multiple frequency)

DTMF (dual tone multiple frequency) project.

A DTMF is one of the electronic control system in which we can control our device with our mobile phone as we like.

The basic function on which our (dtmf ) works is

1) dual tone 
2) multiple frequency
3) pad dialling 
4) reversible system

The basic circuit diagram of DTMF



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