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From: gauthier@ug.cs.dal.ca (Paul Gauthier)
Newsgroups: comp.dcom.telecom
Subject: Re: DTMF Decoder Wanted (or Chips/Schematics)
Message-ID: <14377@accuvax.nwu.edu>
Date: 5 Nov 90 15:08:27 GMT
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X-Telecom-Digest: Volume 10, Issue 793, Message 5 of 11


In article <14326@accuvax.nwu.edu> tad@ssc.UUCP (Tad Cook) writes:

>In article <14220@accuvax.nwu.edu>, aardvark!steve@tessi.uucp (Steve
>Willoughby) writes:

>> The problem is that I can't seem to find any references to
>> DTMF-decoder chips or schematics of discrete-component circuits to do
>> this function.  Any help would be appreciated.

Check one of the recent issues of {Radio & Electronics} at your local
library. One of their recent projects was a board for IBMs which allow
detection of DTMF sounds and other pretty nifty control features of
the phone line. Schematics, pinouts, traces, etc are all in the
article.  I'm not sure which month it was in. I also believe a source
for a complete kit was listed in the article.


PG

gauther@ug.cs.dal.ca
tyrant@ac.dal.ca
tyrant@dalac.bitnet