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???
04/09/04 13:54
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 		 #68243 - RE: ULN2803 Output droping at 3KHz.
Responding to: ???'s previous message
Prahlad,

Why do you even need the ULN2803? Wouldn't you be able to drive the Stepper Motor Drive (which accepts TTL) using the optocouplers? Also why do you need to send the pulses at such a high rate (3kHz)? Without knowing the electrical characteristics of the stepper motor, I can't determine the maximum frequency that the stepper motor will respond to, but typically 3 kHz would be well beyond the normal response range.

Jacob


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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