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Article #15967Re: How would you detect lack of a square wave?
From: John Schuch
Date: Sun, 03 Jan 1993 22:57
Date: Sun, 03 Jan 1993 22:57
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In article <1993Jan2.172332.21070@socrates.umd.edu> jimbo@socrates.umd.edu (Jim Bogard) writes: >What's the best way to detect the presence/lack of a square wave? Go to RadioShack and pickup their little 555 timer cookbook. There is an example missing pulse detector circuit. In essense, the square wave continuously resets the timer before it has time to trigger. If the pulse train stopps, the timer times out and trips. John +--------------------------------------------------------------------------+ | John R. Schuch - Motorola Computer Group - Manufacturing Engineering | | N7XVS - schuch@phx.mcd.mot.com - (602) 438-3008 - CompuServe: 70733.3330 | +--------------------------------------------------------------------------+ -- +--------------------------------------------------------------------------+ | John R. Schuch - Motorola Computer Group - Manufacturing Engineering | | N7XVS - schuch@phx.mcd.mot.com - (602) 438-3008 - CompuServe: 70733.3330 | +--------------------------------------------------------------------------+
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!asuvax!ennews!mcdphx!schuch From: schuch@phx.mcd.mot.com (John Schuch) Subject: Re: How would you detect lack of a square wave? Message-ID: <1993Jan3.225717.10578@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: <1993Jan2.172332.21070@socrates.umd.edu> Date: Sun, 3 Jan 1993 22:57:17 GMT Lines: 21