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???
07/27/04 20:13
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 		 #74988 - RE: Relay interface problem
Responding to: ???'s previous message
will a zener of 3V between pin 3 and VCC of ULN do some good ?

NO.

It sounds like you have not hooked VCC of the ULN to the same 24V as your relay supply. This you must do.

List of 50 messages in thread
TopicAuthorDate
Relay interface problem            01/01/70 00:00      
   RE: Relay interface problem            01/01/70 00:00      
   RE: Relay interface problem            01/01/70 00:00      
      RE: Relay interface problem - Mikkel            01/01/70 00:00      
   RE: Relay interface problem            01/01/70 00:00      
      RE: Relay interface problem            01/01/70 00:00      
      Relay interface problem -looking at it            01/01/70 00:00      
      Ic / Ib = 10...20            01/01/70 00:00      
         RE: Ic / Ib = 10...20 - Kai            01/01/70 00:00      
      RE: Small Addition to the above post            01/01/70 00:00      
   RE: Relay interface problem            01/01/70 00:00      
   RE: Relay interface problem            01/01/70 00:00      
   Negative Logic...            01/01/70 00:00      
      RE: Negative Logic...            01/01/70 00:00      
         What I am doing            01/01/70 00:00      
            RE: What I am doing            01/01/70 00:00      
            RE: What I am doing            01/01/70 00:00      
               RE: What I am doing            01/01/70 00:00      
      will my 89c51 reset ?            01/01/70 00:00      
         RE: will my 89c51 reset ?            01/01/70 00:00      
         RE: will my 89c51 reset ?            01/01/70 00:00      
            RE: will my 89c51 reset ?            01/01/70 00:00      
               RE: will my 89c51 reset ?            01/01/70 00:00      
                  RE: will my 89c51 reset ?            01/01/70 00:00      
                     What's wrong NOW            01/01/70 00:00      
                        RE: What's wrong NOW            01/01/70 00:00      
                        RE: What\\\'s wrong NOW            01/01/70 00:00      
                           RE: Corrected Top Link            01/01/70 00:00      
                           What's wrong 2            01/01/70 00:00      
                              RE: What's wrong 2            01/01/70 00:00      
                                 RE: What's wrong 2            01/01/70 00:00      
                        RE: What's wrong NOW            01/01/70 00:00      
                           RE: What's wrong NOW            01/01/70 00:00      
            RE: will my 89c51 reset ?            01/01/70 00:00      
               RE: will my 89c51 reset ?            01/01/70 00:00      
                  Forget reset 1st connect relay            01/01/70 00:00      
                  RE: will my 89c51 reset ?            01/01/70 00:00      
   Interface works Now            01/01/70 00:00      
      RE: Interface works Now            01/01/70 00:00      
         RE: Interface works Now            01/01/70 00:00      
            RE: Interface works Now            01/01/70 00:00      
               RE: Interface works Now            01/01/70 00:00      
               RE: Interface works Now            01/01/70 00:00      
                  RE: Interface works Now            01/01/70 00:00      
   Problem 2            01/01/70 00:00      
   RE: Relay interface problem            01/01/70 00:00      
      RE: Relay interface problem            01/01/70 00:00      
         RE: Relay interface problem            01/01/70 00:00      
   RE: Relay interface problem            01/01/70 00:00      
      interface problem2 solved            01/01/70 00:00      

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