Article View: sci.electronics
Article #20548Re: DTMF (Touch-Tone) --> RS-232 Conversion
From: DugalJP
Date: Thu, 26 Jan 1989 17:26
Date: Thu, 26 Jan 1989 17:26
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1199 bytes
Pete, I recently purchased the Radio Shack DTMF decoder chip. Looks
very easy to interface. Although you asked about RS-232 interfacing,
I think it would be easy to interface it to a PC's parallel port. Phil
Karn posted some time back on rec.ham-radio about how to modify a
parallel IO card for 8-bit input. I'm not sure a stock card would have
enough input lines .... I think you'd need 5 (4 data plus strobe).
-- James
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-- James Dugal, N5KNX USENET: ...!{dalsqnt,killer}!usl!jpd
Associate Director Internet: jpd@usl.edu
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!gatech!rutgers!bellcore!texbell!killer!pollux!dalsqnt!usl!usl-pc!jpd From: jpd@usl-pc.usl.edu (DugalJP) Newsgroups: sci.electronics Subject: Re: DTMF (Touch-Tone) --> RS-232 Conversion Keywords: DTMF, RS-232, Touch-Tone, Please Help! Message-ID: <177@usl-pc.usl.edu> Date: 26 Jan 89 17:26:14 GMT References: <1441@thumper.bellcore.com> Reply-To: jpd@usl-pc.UUCP (DugalJP) Organization: Univ. of Southwestern La., Lafayette Lines: 15