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Microcontroller › AVR › Matrix Frequencies
I have got a 4*4 matrix keypad and I have a confusion that it will produce DTMF frequencies or not.
Can someone help me out in telling that will it produce DTMF frequencies or not?
For convenience I have attached my keypad’s photo:-
Front View
Back View
Side View
You mean to say a DTMF decoder
Hi Mridul,
You need a DTMF encoder IC to be connected with the keypad to produce DTMF frequencies. You can use a DTMF decoder IC to decode the same.
So sir any DTMF encoder you can tell.
Suggest you to use UM91214 as DTMF encoder and MT8870 as DTMF decoder.