is it easy to design DTMF generator,how much time wil it take.how should i proceed in making it.i hv its generation code in matlab.how wil i interface tha.whyt is the cost if i make it.
hi
U have 2 way
1-analog :use htm9102 or else it make tone code with a 4*4 telephoni keypad
2- digital: use avr application note for tone encoder in www.atmel.com