Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!husc6!bloom-beacon!think!ames!sdcsvax!ucsdhub!jack!man!crash!pnet01!rpluth From: rpluth@pnet01.CTS.COM (Ron Pluth) Newsgroups: sci.electronics Subject: Re: DTMF Message-ID: <1405@crash.CTS.COM> Date: Sat, 18-Jul-87 14:56:23 EDT Article-I.D.: crash.1405 Posted: Sat Jul 18 14:56:23 1987 Date-Received: Sun, 19-Jul-87 06:35:43 EDT Sender: news@crash.CTS.COM Organization: People-Net [pnet01], El Cajon, CA Lines: 15 You can pick up a simple DTMF decoder chip at Radio Shack for $10.95. It outputs in straight binary for either the normal 12 digits or for all 16. I think it might also output in some other format, like Gray code, or something. It takes, as has been mentioned, a cheap crystal, and I think it takes straigt audio inputs. Of course, you must be careful in interfacing it directly to a telephone line, as ring voltages run up to ~150 VAC. Ron Pluth UUCP: {akgua, hplabs!hp-sdd, sdcsvax, nosc} | "We are all in the gutter, !crash!pnet01!rpluth | but some of us are looking ARPA: crash!pnet01!rpluth@nosc.mil | at the stars." INET: rpluth@pnet01.CTS.COM | -Oscar Wilde USPS: 13704 Celestial Rd. Poway, CA 92064 |