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???
03/24/12 12:58
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Msg Score: +1
 +1 Good Answer/Helpful		 #186855 - You dally with danger again!
Responding to: ???'s previous message
Chico, this is one more circuit from the www you present us that is highly dangerous!

Capacitor power supplies where one or several caps are used as voltage divider for the mains voltage are always critical, because a cap turns into a short circuit every time a surge arrives. Because of that proper capacitor power supplies ALWAYS have a current limiting resistor in series with the caps and use special safety components like X-caps, etc.

So, what can happen if you use this circuit? One fine day, may be in the night, components can suddenly overheat or explode and your appartement can catch fire and the developping smoke can kill your whole family before you ever notice the fire.

Kai Klaas

List of 26 messages in thread
TopicAuthorDate
555 Timer for AC            01/01/70 00:00      
   "a circuit I got in the internet..."            01/01/70 00:00      
      Tests            01/01/70 00:00      
         Then leave AC mains well alone!!            01/01/70 00:00      
         then why did you put it together            01/01/70 00:00      
            a recipe for disaster            01/01/70 00:00      
               How safe is safe?            01/01/70 00:00      
                  HUMANLY safe            01/01/70 00:00      
                     I would also add            01/01/70 00:00      
                        A good link to electrical safety            01/01/70 00:00      
   You dally with danger again!            01/01/70 00:00      
   the value of a human life ....            01/01/70 00:00      
      An unsafe bodge for a basically unsuitable design!            01/01/70 00:00      
   So this circuit cant work?...            01/01/70 00:00      
      How much do you understand?            01/01/70 00:00      
      How do you know you know enough?            01/01/70 00:00      
      already answered            01/01/70 00:00      
      Capacitor power supplies...            01/01/70 00:00      
         the bane of the high voltage amateur            01/01/70 00:00      
            Just 24V isn't enough            01/01/70 00:00      
      You are contradicting yourself!            01/01/70 00:00      
   RE: 555 Timer for AC            01/01/70 00:00      
      Triacs            01/01/70 00:00      
   I'm giving up            01/01/70 00:00      
   Re            01/01/70 00:00      
      Don't hijack threads            01/01/70 00:00      

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