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How to build DTMF Decoder and DTMF Encoder using one pin ?

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jhonny_yang

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DTMF PIC16C54

Any Body Know How to build DTMF Decoder and DTMF Encoder using one pin ? And using PIC16C54 ?

My friend said it possible. I already tried and search the web for reference but i can't solve it. Any body can help me Please ? to add the code or some useful document for me.

Thank You
 

Re: DTMF PIC16C54

If I remember corectly, there is an application note from Microchip regarding DTMF using PICmicro. Pelae check the microchip website.

Cheers

Ravi
 

Re: DTMF PIC16C54

ravimarcus said:
If I remember corectly, there is an application note from Microchip regarding DTMF using PICmicro. Pelae check the microchip website.

Cheers

Ravi

The microchip application note for DTMF using PIC16C54 for R2R ladder

and not for PWM.
 

Re: DTMF PIC16C54

Try this link:
hxxp://www.geocities.com/constantinescuradu/content/dtmf.htm

Hope will help you!

Cristi
 

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