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- Newsgroups: sci.electronics
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!wupost!cs.utexas.edu!asuvax!ennews!mcdphx!schuch
- From: schuch@phx.mcd.mot.com (John Schuch)
- Subject: Re: DTMF Decoder (I know -- "AGAIN?")
- Message-ID: <1992Nov20.123854.940@phx.mcd.mot.com>
- Sender: news@phx.mcd.mot.com
- Nntp-Posting-Host: bopper2.phx.mcd.mot.com
- Organization: Motorola Computer Group, Tempe, Az.
- References: <92323.19415834II5MT@CMUVM.CSV.CMICH.EDU>
- Date: Fri, 20 Nov 1992 12:38:54 GMT
- Lines: 26
-
- In article <92323.19415834II5MT@CMUVM.CSV.CMICH.EDU> 34II5MT@CMUVM.CSV.CMICH.EDU (John Goggan) writes:
- >This comes up now and then and I'm always interested, but no one ever
- >seems to come up with a definate answer. I'm looking for a schematic
- >for a touch-tone decoder circuit. Something that simply takes audio
- >input and lights an appropriate LED for 0-9,#,*,A-D when it "hears"
- >
- >I'd almost given up hope and forgotten about the project for a while when
- >I recieved the new All Electronics catalog (#492)... One of the items
- >offered is some "revolutionary toner-transfer paper" or something.
- >Anyways, the picture included next to that ad is one side of a pc board
- >etching -- and the title is etched on it -- "TONE DECODER." If you
-
- If you have a FAX machine, I'll send you a schematic for a DTMF to
- LED display which only uses 9 parts.
-
- John
-
- (If I can figure out how to get a postscript file out of Island Draw,
- I'd be willing to post it to the net. )
-
-
- --
- | ONE LINE NOVEL: She backed away from the corpse slowly, not so much out |
- | of fear, but simply unsure of what the crowd expected her to do with it. |
- +--------------------------------------------------------------------------+
- | John R. Schuch - Motorola Computer Group - Manufacturing Engineering |
-