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Frankenstein's Fix: Dirty Signals

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David Ashton
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Re: clarity
David Ashton   10/4/2013 1:23:14 AM
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@andy....we're looking forward to seeing yours soon then, to show us how it should be done....

Andy_I
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clarity
Andy_I   10/4/2013 1:18:13 AM
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Do the people who write these articles ever bother to see what they look like when they get published?

I mean, COME ON, EE Times!  WAKE UP!  This is such a joke.

 

 

WKetel
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A tuned filter?
WKetel   9/28/2013 9:10:24 PM
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My first thought would be a tuned LC filter, resonant around 120 Hz. That would have avoided the noise problem and been far more reliable, and a whole lot cheaper.

When I was designing test equipment for factory floor operation we almost always put a Sola Brabd constant voltage transformer ahead of the controls and instrumantation power input. It was always cheaper than even one service call to fix a machine, and it gave us a reputaion for producing very reliable testing machines. The noise on the waveform on the scope traces looks a bit like it comes froman inverter drive circuit for a medium horsepower motor.

Caleb Kraft
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Re: Why so complex?
Caleb Kraft   9/27/2013 11:55:11 AM
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that is the funny thing about so many stories involving solving a problem. Someone always comes along with a single sentence that would have probably saved you hours... a long time after the fact.

DU00000001
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CEO
Re: Why so complex?
DU00000001   9/27/2013 9:42:33 AM
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It's not so easy to create a monster :)

Though the schematics are difficult to read I can identify some R's on the primary side. Thus an adequate C should have done the trick.

cjperkins
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Why so complex?
cjperkins   9/26/2013 3:32:53 PM
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Wouldn't a simple RC filter have cleaned up the 60 Hz to get a stable clock?

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