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???
07/04/06 13:52
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 		 #119619 - yes, but some more questions
Responding to: ???'s previous message
Kai said:

Abhishek, you don't need extra hardware to debounce multiple switches!


Thanks a lot for your interest in this Kai. Yes, I am aware that debouncing does not necessarily require slave MuCs, it is possible to do the entire thing in one chip, and I will eventually do that. But only to begin with I will have two simple programs running rather than 1 complicated one. As you know I am a beginner and would not like to scare myself away from things!
However, even with this I have a question to ask:

I have to monitor 64 relays, each sends closes at least once every second. So I have to run the debouncing routine 8 times on the input port before I get input form all the relays. Don’t you think that is going to be a problem?

And by the way, please also let me know if the latch is mandatory.

List of 34 messages in thread
TopicAuthorDate
Debouncing with an 8051 of 16 I/O pins            01/01/70 00:00      
   You don't need these slave micros            01/01/70 00:00      
      yes, but some more questions            01/01/70 00:00      
         Not scary at all...            01/01/70 00:00      
            In that case.....            01/01/70 00:00      
            here is the schematic            01/01/70 00:00      
               I would try shift registers            01/01/70 00:00      
               just a note            01/01/70 00:00      
                  The joke is:            01/01/70 00:00      
                     the reality is            01/01/70 00:00      
                     Re: The joke is            01/01/70 00:00      
      correct, but            01/01/70 00:00      
         I was assuming...            01/01/70 00:00      
   Bounce time of your relays?            01/01/70 00:00      
      Not very clearly            01/01/70 00:00      
         Bravo!            01/01/70 00:00      
   The original question            01/01/70 00:00      
      What's wrong with the shift register sol            01/01/70 00:00      
      HUH?            01/01/70 00:00      
         I am sorry            01/01/70 00:00      
            that was not the issue            01/01/70 00:00      
   why oh why oh why oh why            01/01/70 00:00      
      because it cost nothing            01/01/70 00:00      
         yeah right            01/01/70 00:00      
            yes, they do            01/01/70 00:00      
            Design is a state function            01/01/70 00:00      
               All the more using shift registers!            01/01/70 00:00      
                  I think your solution is better            01/01/70 00:00      
                     I guessed so...            01/01/70 00:00      
                  hidden part            01/01/70 00:00      
                     I can see a 'lucky sample' of a shift re            01/01/70 00:00      
                     True, but...            01/01/70 00:00      
   jezwolds hardware switch debouncer            01/01/70 00:00      
   The facts about costs of Debouner chips            01/01/70 00:00      

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