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???
02/03/05 13:39
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 		 #86463 - New Findings!!!
Responding to: ???'s previous message

Hello all,

After a day of testing and fault finding this is what I have come up with!

As you may recall, I have a 12V regulator "feeding" a 5V regulator on my board. Well, using the scope, I found that when the 110V pnumatic switches oppened and closed there was a very small (4V max) peak to peak spike on the input to the 12V regulator, and a smaller spike on the input to the 5V regulator (which is the output of the 12V regulator). However, when I measured the output of the 5V regulator, I find a 12V to 18V peak to peak spike!

Where does that come from, does anyone have any Ideas or soloutions?
ps. I will try to post my cct as soon as I can!

Thank you for your time!
sun

List of 30 messages in thread
TopicAuthorDate
Stalling uC            01/01/70 00:00      
   Stalling?            01/01/70 00:00      
   it's noise            01/01/70 00:00      
   Why the new Thread?            01/01/70 00:00      
   WDT Palliative only            01/01/70 00:00      
   The whole story..............and problem            01/01/70 00:00      
      What have you actually done so far?            01/01/70 00:00      
      Real code?            01/01/70 00:00      
   Compiled your code. Errors shown below            01/01/70 00:00      
      Nicely formatted code!            01/01/70 00:00      
      Update, and also Code in correct format            01/01/70 00:00      
         One small step            01/01/70 00:00      
   Some findings            01/01/70 00:00      
      Now it's becoming clearer            01/01/70 00:00      
      5V regulator            01/01/70 00:00      
         ground bounce            01/01/70 00:00      
            [OT] 110V to 220V            01/01/70 00:00      
               Hmm            01/01/70 00:00      
               More [OT] But shocks hurt more            01/01/70 00:00      
               110V in Latin America            01/01/70 00:00      
                  picky picky            01/01/70 00:00      
                  110V in Latin America            01/01/70 00:00      
   More info & an ans to Russell's question            01/01/70 00:00      
      Picture Posting            01/01/70 00:00      
   New Findings!!!            01/01/70 00:00      
      find the following            01/01/70 00:00      
   Update & Stable supply network            01/01/70 00:00      
      I think there are still problems            01/01/70 00:00      
      patching            01/01/70 00:00      
         Update            01/01/70 00:00      

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