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???
03/29/08 01:43
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 		 #152698 - shock? touching what?
Responding to: ???'s previous message
Hello Everybody,
Kai said,
This doubtlessly means, that reversing neutral and phase WILL or CAN give a shock.

Can give a shock? By touching what? Everything is enclosed and sealed and LIVE is insulated by a plastic sheet and air gap 0.5 inch.So shock by touching what?
There are ultra small mains transformers available today, offering nearly ideal isolation.
These with so high turns per volt and sooooo thin INSULATED wire and so little window for insulating secondary from primary are running HOT and hence in OUR CLIMATE are unreliable statistically.I use them daily in chinese gadgets... damm hot...but surprisingly yet to fail.In any case I am not married to transformerless power supply and would be grateful if you would kindly give me names,details of best ultra small power transformers(230V to about three secondaries) PCB mounted and APPROVED.
With best regards
A.S.Rudra


List of 44 messages in thread
TopicAuthorDate
Possibly noisy Relay/Switch Inputs            01/01/70 00:00      
   Schmitt inverter            01/01/70 00:00      
      Thanks Steve but please note change            01/01/70 00:00      
         Steve's suggestion is certainly valid!            01/01/70 00:00      
            Thanks Richard            01/01/70 00:00      
               Do you really need the optoisolators?            01/01/70 00:00      
         Why Schmitt Gates            01/01/70 00:00      
            That is the purpose of Schmidt-triggers ...            01/01/70 00:00      
   This is how I would do it            01/01/70 00:00      
      I'd probably do that too, except ...            01/01/70 00:00      
      Thanks            01/01/70 00:00      
         The waters have been muddied ...            01/01/70 00:00      
            Thanks            01/01/70 00:00      
               Yes, it's clearer, but ...            01/01/70 00:00      
                  Priority Encoder Not a Good Idea            01/01/70 00:00      
                     Yes, highest priority input would mask others            01/01/70 00:00      
                     Welcome Sir Michael Karas            01/01/70 00:00      
                        Note Length & Cadence on One Timer            01/01/70 00:00      
         Noise            01/01/70 00:00      
            It's all analog            01/01/70 00:00      
   Another way to do this            01/01/70 00:00      
   how fast do you need to detect the contacts            01/01/70 00:00      
      Hello Erik,Hello Kai,            01/01/70 00:00      
         what are you describing?            01/01/70 00:00      
            actual distance test(ohmically)            01/01/70 00:00      
               please answer questions            01/01/70 00:00      
                  Part success            01/01/70 00:00      
                     In the last analysis, it is up to you            01/01/70 00:00      
                        Provocative            01/01/70 00:00      
                           totally irrelevant            01/01/70 00:00      
                     what 'common'            01/01/70 00:00      
                     Transformerless supply...            01/01/70 00:00      
                        Thanks            01/01/70 00:00      
                           I do not understand, parallelling switches            01/01/70 00:00      
                              Absolutely deadly dangerous!!!!            01/01/70 00:00      
                              parallelling switches            01/01/70 00:00      
                                 Sorry, but I see a contradiction...            01/01/70 00:00      
                                    shock? touching what?            01/01/70 00:00      
                                       Come on!            01/01/70 00:00      
                                          The standard to which we designed ...            01/01/70 00:00      
         I believe you may have missed the point            01/01/70 00:00      
   Current rating of relay?            01/01/70 00:00      
      not to nitpick, but            01/01/70 00:00      
         Thank you very much Erik            01/01/70 00:00      

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