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???
07/15/10 17:12
Modified:
  07/15/10 17:39

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Msg Score: +1
 +1 Good Answer/Helpful
#177306 - This might be the problem
Responding to: ???'s previous message
Hi Avni,
Congrats !!! You could upload the schematic. But you need to edit it, to make it small.

I think there is a problem in your Zero-Cross detection circuit. Are you sure it is working OK, have you tested those signals on an Oscilloscope?

I think there must be an additional diode as shown below in a Red Circle:


I believe the value of the capacitor at the input of 7805 is pretty large. Value is not mentioned in the schematic.


I just downloaded your JPG File in my PC,
used MSPaint to cut the necessary section by Selecting and giving <Ctrl-C> "Copy",
Opened a new Paint File, and gave a <Ctrl-V> "Paste"
resized and edited that file and pasted it on this forum.
Size: 7116 Bytes.


Edit:
The same file saved as GIF File:
Size: 6008 Bytes


You can see the quality is reduced, but size has reduced, so you can decide, what is more important Size or Quality?


List of 50 messages in thread
TopicAuthorDate
triac firing angle            01/01/70 00:00      
   is the output loaded?            01/01/70 00:00      
      o/p side            01/01/70 00:00      
         at output side we have connected fan            01/01/70 00:00      
            230v ac fan            01/01/70 00:00      
               it would not            01/01/70 00:00      
                  230v ac blub            01/01/70 00:00      
                     Suppose?            01/01/70 00:00      
   so it's down to your scribbles            01/01/70 00:00      
   So many questions            01/01/70 00:00      
      discription            01/01/70 00:00      
         why bother            01/01/70 00:00      
         Try this            01/01/70 00:00      
         Another potential problem            01/01/70 00:00      
            e-mail address            01/01/70 00:00      
               no need for a circuit diagrem, but ..            01/01/70 00:00      
               RE: I'm not able to attach my circuit diagram            01/01/70 00:00      
                  Not Me...........            01/01/70 00:00      
                     Oops            01/01/70 00:00      
   My Method to post circuit diagram            01/01/70 00:00      
      website address            01/01/70 00:00      
         orcad            01/01/70 00:00      
         Read the instructions!            01/01/70 00:00      
            schematic            01/01/70 00:00      
               Link            01/01/70 00:00      
               Follow the instructions!            01/01/70 00:00      
                  schematic            01/01/70 00:00      
                     Two LEDs ?!            01/01/70 00:00      
                     This might be the problem            01/01/70 00:00      
                     Or this might be the problem...            01/01/70 00:00      
                     Don't understand            01/01/70 00:00      
                        Re zero-crossing, still has no been answered            01/01/70 00:00      
                     There are none so blind as those that will not see...            01/01/70 00:00      
                        working but not getting satisfication            01/01/70 00:00      
                        working but not getting satisfication            01/01/70 00:00      
                           What did you expect?            01/01/70 00:00      
                              which will ...            01/01/70 00:00      
                                 RE: "indentions"            01/01/70 00:00      
                     Redesign needed            01/01/70 00:00      
                        Problematic...            01/01/70 00:00      
                           The Triac firing angle can be set using the Analog Comp.            01/01/70 00:00      
                              Danger!            01/01/70 00:00      
                              Caution to hobbiest            01/01/70 00:00      
                                 Some hints to start the circuit working            01/01/70 00:00      
                                    The OP's schematic *is* isolated            01/01/70 00:00      
                                       People tend to consider processors "safe"            01/01/70 00:00      
                                    Isolation            01/01/70 00:00      
                                       many different opinions/views for the same issue            01/01/70 00:00      
                                          RE: The schematic as posted has major flaws            01/01/70 00:00      
      Thanks            01/01/70 00:00      

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