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???
08/06/06 20:54
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 		 #121760 - bear in mind
Responding to: ???'s previous message
...that a piezo when moved or banged can GENERATE considerable voltages. The isolation of a transistor, and some zener protection can be useful.

Steve

List of 40 messages in thread
TopicAuthorDate
Does logic "low" represent 0V?            01/01/70 00:00      
   The diagram does not work            01/01/70 00:00      
      What current are we talking about?            01/01/70 00:00      
      More details needed!            01/01/70 00:00      
   Using a transistor            01/01/70 00:00      
      Yes, but...            01/01/70 00:00      
         bear in mind            01/01/70 00:00      
            Of course, but...            01/01/70 00:00      
         forgot to mention: cookbook was for a piezo buzzer            01/01/70 00:00      
            In such a case...            01/01/70 00:00      
      Low hissing sound            01/01/70 00:00      
         Try            01/01/70 00:00      
            Circuit details and summary of my problem            01/01/70 00:00      
               either a mistype or connecting the buzzer the wron            01/01/70 00:00      
                  Update            01/01/70 00:00      
                     Please do as I have asked: connect the buzzer            01/01/70 00:00      
               What you tell is confusing...            01/01/70 00:00      
                  As mentioned by Kai Klaas            01/01/70 00:00      
                     Do not 'believe' MEASURE and be sure            01/01/70 00:00      
               Solving buzzer problem            01/01/70 00:00      
   Barbecue?            01/01/70 00:00      
   Type of buzzer            01/01/70 00:00      
      who knows how much power, how big spikes            01/01/70 00:00      
      Again...            01/01/70 00:00      
         Yeah            01/01/70 00:00      
            Try this!            01/01/70 00:00      
               just guessing            01/01/70 00:00      
                  guessing the current is below 5A...            01/01/70 00:00      
                     then what if it is 1uA            01/01/70 00:00      
                        Sorry.            01/01/70 00:00      
                     We just do not want to guess!!            01/01/70 00:00      
                        Sorry.            01/01/70 00:00      
                           No need to appologize, dear Leonardo...            01/01/70 00:00      
                           not a metter of apology            01/01/70 00:00      
               Buzzer Problem Solved            01/01/70 00:00      
                  Nice to know            01/01/70 00:00      
   No longer interested, Eugene??            01/01/70 00:00      
      of course not            01/01/70 00:00      

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