Are Frequencies Produced

[Mridul Agarwal]

My Question is that a matrix keypad which costs about INR 150 or 3$-4$ produces frequencies which can be decoded by a DTMF decoder and then used for interfacing with ATmega16. 

 

 

 

 

Thanks in Advance.

Please Its Urgent.

[Jason Jordon]

It is quite similar to a conventional telephone. Yes, a 4*4 keypad can produce upto 16 different frequencies. You need to program the microcontroller for that purposes. Does this ease your problem?

[Mridul Agarwal]

Thanxxx it will be helpful.

[Shrikant]

hey…i would suggest you to go with the dtmf encoder ic in order to generate the frequencies..! just a suggestion

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