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Sonsivri
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Electronics
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Pic Basic Languages
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DTMF
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Topic: DTMF (Read 5317 times)
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king
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Jack of All But Master of One
DTMF
«
on:
January 04, 2010, 09:57:53 09:57 »
hi!
BY DTMFOUT command in Proton we can send DTMF tones on the telephone line but how we can receive these DTMF signals on the receiving end if both transmitted and receiving sides are controlled by the PIC microcontroller
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Last Edit: January 04, 2010, 10:53:51 10:53 by king
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oldvan
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If the van is a Rockin'...
Re: DTMF
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Reply #1 on:
January 04, 2010, 02:42:57 14:42 »
Looks like decode can be done in software, here's an example using a 16F877:
http://dtmf.voipintouch.net/content/dtmf.htm
Otherwise hunt down a DTMF decoder chip and let its hardware do the work,
feed the outputs to PIC inputs.
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glenndr_15
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Re: DTMF
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Reply #2 on:
January 04, 2010, 03:30:49 15:30 »
Greetings!
here is a link for a DTMF decoder
http://electronics-diy.com/electronic_schematic.php?id=509
It uses MT8870 DTMF decoder and PIC microcontroller to decode telephone tones.
you can also find information about DTMF/DTMF projects in this link
http://www.discovercircuits.com/D/dtmf.htm
Enjoy!
Best regards,
glenndr_15
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Last Edit: January 04, 2010, 03:42:41 15:42 by glenndr_15
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