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???
04/09/04 09:13
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 		 #68239 - RE: ULN2803 Output droping at 3KHz.
Responding to: ???'s previous message
Michael the schematic which you have posted is perfectly describing my connections. The only thing is the ULN2803 is connected to optocouplers and which in turn are connected to uC port pins.

I don't have pull ups across ULN2803 outputs at present. Whats value pull up resistors should I use.
Thanks in advance.

List of 47 messages in thread
TopicAuthorDate
ULN2803 Output droping at 3KHz.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
      RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
         RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
            RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
         RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
            RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
               RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
            RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
               RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
                  RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
      RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
         RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
            RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
      RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
         RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
      RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
         RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
            RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
               RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
      RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
      RE: Schematic would help us            01/01/70 00:00      
   CNY17-3 is the culprit!            01/01/70 00:00      
      RE: CNY17-3 is the culprit!            01/01/70 00:00      
         RE: CNY17-3 is the culprit!            01/01/70 00:00      
            RE: CNY17-3 is the culprit!            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
      May be Prahlad will inform us now?            01/01/70 00:00      
      RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
         RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
         RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      
      We are still waiting for more details            01/01/70 00:00      
         3 kHz ? Stepper motor ?            01/01/70 00:00      
      RE: ULN2803.            01/01/70 00:00      
         RE: ULN2803.            01/01/70 00:00      
         RE: ULN2803.            01/01/70 00:00      
            RE: ULN2803.            01/01/70 00:00      
         RE: ULN2803.            01/01/70 00:00      
            RE: ULN2803.            01/01/70 00:00      
   RE: ULN2803 Output droping at 3KHz.            01/01/70 00:00      

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