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???
04/20/10 18:07
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 		 #175190 - Fast and low voltage drop
Responding to: ???'s previous message
The schottky diodes have a low voltage drop. Having them connected to VCC means that a low overvoltage on one of your input pins will result in the schottky diode shorting the overvoltage to VCC, protecting the processor pins. The higher voltage drop of a standard silicon diode will allow 0.7-1V of overvoltage, while a schottky diode may clip at 0.2-0.5V overvoltage.

The schottky diodes are also very fast.

List of 25 messages in thread
TopicAuthorDate
Hobbyist asking for professionals to solve noise problems            01/01/70 00:00      
   images on web upload            01/01/70 00:00      
   sounds like missing debounce            01/01/70 00:00      
      yes no software debounce            01/01/70 00:00      
         Sample superloop            01/01/70 00:00      
   Hhm, many problems to solve...            01/01/70 00:00      
      can only post after 7pm india            01/01/70 00:00      
      detailed reply with images link            01/01/70 00:00      
         Fast and low voltage drop            01/01/70 00:00      
            still have some doubts            01/01/70 00:00      
               ?? any replies            01/01/70 00:00      
                  Think about which polarity you want the diode to conduct            01/01/70 00:00      
                     it should be case2            01/01/70 00:00      
                        just a question            01/01/70 00:00      
                           adding it now            01/01/70 00:00      
                              software debounce done :-)            01/01/70 00:00      
                                 if you do not need "wake up" on a keypress ...            01/01/70 00:00      
                                    got it            01/01/70 00:00      
                                       you don't, so what            01/01/70 00:00      
                                          Thanks for pseudo            01/01/70 00:00      
         Two major mistakes...            01/01/70 00:00      
            points taken,my understandings            01/01/70 00:00      
               Design for an industrial environment!            01/01/70 00:00      
                  the oft missed point            01/01/70 00:00      
                     thanks for feedbacks            01/01/70 00:00      

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