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Erik Malund
06/19/12 09:24
Read: 619 times
Mt Airy, Nc
USA


 
#187793 - anyhow this begs a question
Responding to: John Papas's previous message
In the circuits that have this problem, the MAX307 is also destroyed(the reset is always active)
then replace it
or its output is lower than its supply. So, when the supply is 5v i should take 5V, but i measure 4V.
well above Vih, not a problem

anyhow this begs a question. does your micro (which I have never heard of, post a datsheet link) have it's own reset circuit like e.g. the Rx2. If so, and no isolation between the two, you will keep blowing resets.

Erik

PS re "post datsheet link" NOT from a blasted "datsheet collector", from the manufacturer

List of 14 messages in thread
TopicAuthorDate
circuit repair, high level of all adress bytes      John Papas      06/15/12 15:16      
   what's on P2 is not that intersting initially, ...      Erik Malund      06/15/12 16:46      
      oszi daten      John Papas      06/18/12 12:16      
         depends on the app, but still      Erik Malund      06/18/12 12:51      
      we'll need a schematic, I believe.      Richard Erlacher      06/18/12 19:38      
   general guidelines      Mahmood Elnasser      06/18/12 22:45      
   RE      John Papas      06/19/12 03:39      
      Hardware check      Mahmood Elnasser      06/19/12 07:34      
      anyhow this begs a question      Erik Malund      06/19/12 09:24      
         Replay      John Papas      06/19/12 15:52      
            It wouldn't hurt to know how you've connected your hardware      Richard Erlacher      06/19/12 17:03      
               new      John Papas      06/20/12 07:12      
                  Just curious...      Hal Albach      06/20/12 07:34      
                     I have to agree with Hal, it can't be done ...      Richard Erlacher      06/20/12 09:13      

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