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???
03/29/05 15:22
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 		 #90600 - One futther on the Wall Wart Idea...
Responding to: ???'s previous message
You may also consider the newest in wall wart technology which are the small universal input switcher type. These have no bulky transformer but are a bit more costly. At any rate, as Kai said, the wall wart response time is way slower unless you pick a low current model and put a 25 to 33 ohm resistor across its output leads.

The wall wart is a simple solution for a one-up type project but if one were to go for manufacturing then the lower cost circuit such as Kai presented is more appropriate.

Michael Karas


List of 37 messages in thread
TopicAuthorDate
Detecting 220V            01/01/70 00:00      
   AC-input optoisolator            01/01/70 00:00      
      Thanks!            01/01/70 00:00      
   I'd use a transformer            01/01/70 00:00      
      Why the transformer?            01/01/70 00:00      
         not necessarily relative to ground            01/01/70 00:00      
            Neon + LDR?            01/01/70 00:00      
      I read the Datasheet of MID400            01/01/70 00:00      
         MID400            01/01/70 00:00      
            That's strange, Erik!            01/01/70 00:00      
               recognized            01/01/70 00:00      
                  "You're Forgiven, Not Forgotten..."            01/01/70 00:00      
   Transformer isolation recommended            01/01/70 00:00      
      May I Modify Your Suggestion Kai ??            01/01/70 00:00      
         Of course...            01/01/70 00:00      
            Kai, Michael - what about ready-made            01/01/70 00:00      
               Could also solve the problem            01/01/70 00:00      
                  One futther on the Wall Wart Idea...            01/01/70 00:00      
                  Wall Wart            01/01/70 00:00      
      Is optoisolation fundamentally dangerous            01/01/70 00:00      
         No, not fundamentally, but...            01/01/70 00:00      
            What is dangerous?            01/01/70 00:00      
   A different view            01/01/70 00:00      
   I'm sweating... ;-)            01/01/70 00:00      
      wallwarts            01/01/70 00:00      
         Oh, I see!            01/01/70 00:00      
            that's a lot of fuses            01/01/70 00:00      
            A bit clarification required            01/01/70 00:00      
               Forgot to press the "Post" button            01/01/70 00:00      
                  enough, yes - that much, no            01/01/70 00:00      
                  Existing commercial products            01/01/70 00:00      
                     Quite a large project, indeed...            01/01/70 00:00      
                        Mains control            01/01/70 00:00      
                           I know...            01/01/70 00:00      
                        Safety issues            01/01/70 00:00      
   Another idea, using a coil and an op-amp            01/01/70 00:00      
      RE: Another idea...            01/01/70 00:00      

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