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???
05/07/07 18:38
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 		 #138742 - Explain
Responding to: ???'s previous message
Nandhu Kumar said:
need to maintain the status of the relay when the power goes off.

Do you mean the relay has to be able to stay activated whilst the power is off, or just that it must resume its previous state when the power is restored?



List of 26 messages in thread
TopicAuthorDate
non volatile 1bit ram            01/01/70 00:00      
   well, serial EEPROMs are dirt cheap            01/01/70 00:00      
   A non-volatile Flip-Flop?            01/01/70 00:00      
      2 bits - 74HC74+battery            01/01/70 00:00      
         waaaaaaay more costly than an EEPROM            01/01/70 00:00      
            yeah, but it's only 2 bits...            01/01/70 00:00      
               1 Ferrite Core?            01/01/70 00:00      
                  ferrite?            01/01/70 00:00      
                     Faint recollections...            01/01/70 00:00      
                        yeah, that's it, the read, not retention            01/01/70 00:00      
                        use a 10000uf capacitor!            01/01/70 00:00      
                        they have a "read only" command            01/01/70 00:00      
            Try a relay            01/01/70 00:00      
               Cost not a consideration...?            01/01/70 00:00      
               Bistable relay - cross reference            01/01/70 00:00      
      Ramtron Statesaver            01/01/70 00:00      
   Zero-power latching switch?            01/01/70 00:00      
   Some 805x MCU's have that feature            01/01/70 00:00      
      More Details            01/01/70 00:00      
         Explain            01/01/70 00:00      
            To andy            01/01/70 00:00      
               can it stay where it was when power went off?            01/01/70 00:00      
         Bi-stable Relay            01/01/70 00:00      
            Yes, that's the one - and available in India            01/01/70 00:00      
            polarized latching relay            01/01/70 00:00      
               Yes            01/01/70 00:00      

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