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Kai Klaas
03/24/12 06:58
Read: 269 times
Germany


 
Msg Score: +1
 +1 Good Answer/Helpful		 #186855 - You dally with danger again!
Responding to: Chico Magalhães'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      Chico Magalhães      03/23/12 15:42      
   "a circuit I got in the internet..."      Andy Neil      03/24/12 00:44      
      Tests      Chico Magalhães      03/24/12 01:25      
         Then leave AC mains well alone!!        Andy Neil      03/24/12 05:11      
         then why did you put it together        Erik Malund      03/26/12 06:57      
            a recipe for disaster        Andy Neil      03/26/12 12:38      
               How safe is safe?      Justin Fontes      03/26/12 13:51      
                  HUMANLY safe      Erik Malund      03/26/12 13:57      
                     I would also add      Justin Fontes      03/26/12 14:21      
                        A good link to electrical safety      Justin Fontes      03/26/12 20:28      
   You dally with danger again!        Kai Klaas      03/24/12 06:58      
   the value of a human life ....      Erik Malund      03/26/12 13:02      
      An unsafe bodge for a basically unsuitable design!      Andy Neil      03/26/12 13:24      
   So this circuit cant work?...      Chico Magalhães      03/26/12 22:03      
      How much do you understand?      David Prentice      03/27/12 01:07      
      How do you know you know enough?      Per Westermark      03/27/12 01:16      
      already answered      Erik Malund      03/27/12 06:09      
      Capacitor power supplies...        Kai Klaas      03/27/12 17:03      
         the bane of the high voltage amateur      Erik Malund      03/28/12 07:03      
            Just 24V isn't enough      Per Westermark      03/28/12 07:53      
      You are contradicting yourself!      Andy Neil      03/28/12 14:11      
   RE: 555 Timer for AC        Hans Van Pelt      03/27/12 02:48      
      Triacs      Andy Neil      03/28/12 14:08      
   I'm giving up        Chico Magalhães      03/28/12 21:25      
   Re      Ramesh Rai      04/18/12 21:03      
      Don't hijack threads      Andy Neil      04/18/12 23:14      

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