Article View: sci.electronics
Article #10059Re:PC interfacing and DTMF
From: hbg6
Date: Mon, 11 Feb 1991 12:23
Date: Mon, 11 Feb 1991 12:23
31 lines
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2164 bytes
In article <1991Feb8.013313.13624@amd.com> lpdjb@brahms.amd.com (Jerry Bemis) writes: >What type od pub. is Circuit Cellar? Does the artical include DTMF? >if so could you send me a copy of it? > Circuit Cellar Ink is a hardware/software magazine with an 'I'd rather build it myself' attitude. The technical level of most of the construction articles is somewhere between Radio Electronics Magazine and a BSEE. They are at (215)630-1914. The article in question, Feb/Mar issue 19, pg.22, 'A PC Stopwatch', details a software controlled stopwatch which one could use to measure run times of program segments as well as other things I suppose. I just took the left half of their schematic ( the bus interface/address decode section ) and spliced my DTMF decoder to it. Now that I look at it, the interface is pretty simple, I'd just never 'hacked' one before. The board ran all weekend time/date stamping DTMF transmissions over the local police channels and worked well. ( NO the goal is not to record numbers dialed on cordless phones, though the board will work well in that application, this is a telemetry project). John ..................................................................... reply to 'from' address; hbg6@citek.mcdphx.mot.com NOT the 'sender' line address! Someday my sysadm will decide this is a 'real' problem. :-) ..................................................................... All opinions expressed are mine and not Motorolas, their loss. .....................................................................
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<1290@cameron.egr.duke.edu! <823@ssc.UUCP> <14525@mcdphx.phx.mcd.mot.com> <1991Feb8.013313.13624@amd.com>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!cs.utexas.edu!asuvax!mcdphx!citek.mcdphx.mot.com!hbg6 From: hbg6@citek.mcdphx.mot.com Newsgroups: sci.electronics Subject: Re:PC interfacing and DTMF Message-ID: <14559@mcdphx.phx.mcd.mot.com> Date: 11 Feb 91 12:23:55 GMT Sender: listen@mcdphx.phx.mcd.mot.com Reply-To: hbg6@citek.mcdphx.mot.com Organization: Motorola Microcomputer Division, Tempe, Az. Lines: 31 References: <1290@cameron.egr.duke.edu! <823@ssc.UUCP> <14525@mcdphx.phx.mcd.mot.com> <1991Feb8.013313.13624@amd.com> Distribution: usa