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???
03/08/05 06:59
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 		 #89252 - I think there are still problems
Responding to: ???'s previous message

Sun,

I think you still have some fundamental problems. The 7805 is not expected to work at 10mhz - it wants DC!

As for the PIC vs 8051 comparison based on 2-5v vs 4-5.5v - if your regulator was ok, then this comparison is invalid. Your regulator circuit must give the cpu 5V - if it doesn't - you'll have problems like you have now. As I've said before, I have similar circuits that switch 3 phase motors, hydraulic solenoids etc all without a glitch - am I'm not doing anything magic. It would seem that the switching spikes from the solenoids are getting back into your power supply.

How does your circuit compare with the PIC based device? How does it work where yours doesn't - there must be a fundamental difference! Would the PIC processor work if you modified your circuit board?

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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