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Thread Closed: Issue successfully resolved

Ijaz Ahmed
04/10/04 14:36
Read: 482 times
Islamabad
Pakistan


 		 #68293 - RE: CNY17-3 is the culprit!
Responding to: Kai Klaas's previous message
Beside this, I think your optocoupler is responsible for the malfunction. My datasheet says: rise time 300µsec, fall time 300µsec!! So, for a full range swing you need 300µsec plus 300µsec, makes 600µsec, which corresponds to a maximum frequency of 1.7kHz!!!
So, your observation at 3kHz is no surprise with this data.

To the best of my knowledge, CNY17-3 is not that slow. Which datasheet you are consulting?




List of 47 messages in thread
TopicAuthorDate
ULN2803 Output droping at 3KHz.      Prahlad J. Purohit      04/06/04 11:08      
   RE: ULN2803 Output droping at 3KHz.      Steve M. Taylor      04/06/04 11:58      
      RE: ULN2803 Output droping at 3KHz.      Prahlad J. Purohit      04/06/04 12:07      
         RE: ULN2803 Output droping at 3KHz.      Erik Malund      04/06/04 12:10      
            RE: ULN2803 Output droping at 3KHz.      Prahlad J. Purohit      04/06/04 12:21      
         RE: ULN2803 Output droping at 3KHz.      Steve M. Taylor      04/06/04 12:30      
            RE: ULN2803 Output droping at 3KHz.      Prahlad J. Purohit      04/06/04 12:40      
               RE: ULN2803 Output droping at 3KHz.      Steve M. Taylor      04/06/04 14:55      
            RE: ULN2803 Output droping at 3KHz.      Erik Malund      04/06/04 12:44      
               RE: ULN2803 Output droping at 3KHz.      Prahlad J. Purohit      04/06/04 12:51      
                  RE: ULN2803 Output droping at 3KHz.      Erik Malund      04/06/04 12:54      
   RE: ULN2803 Output droping at 3KHz.      Charles Bannister      04/06/04 12:20      
      RE: ULN2803 Output droping at 3KHz.      Prahlad J. Purohit      04/06/04 12:36      
         RE: ULN2803 Output droping at 3KHz.      Steve M. Taylor      04/06/04 12:55      
            RE: ULN2803 Output droping at 3KHz.      Erik Malund      04/06/04 13:08      
   RE: ULN2803 Output droping at 3KHz.      IJAZ AHMED      04/06/04 13:32      
      RE: ULN2803 Output droping at 3KHz.      Christian Kleiber      04/06/04 14:05      
         RE: ULN2803 Output droping at 3KHz.      Erik Malund      04/06/04 14:25      
   RE: ULN2803 Output droping at 3KHz.      Jacob Boyce      04/06/04 16:08      
      RE: ULN2803 Output droping at 3KHz.      Erik Malund      04/06/04 16:11      
         RE: ULN2803 Output droping at 3KHz.      Jacob Boyce      04/06/04 16:12      
            RE: ULN2803 Output droping at 3KHz.      Steve M. Taylor      04/06/04 16:53      
               RE: ULN2803 Output droping at 3KHz.      Jacob Boyce      04/07/04 08:03      
   RE: ULN2803 Output droping at 3KHz.      Terry Lingle      04/06/04 19:58      
   RE: ULN2803 Output droping at 3KHz.      Oleg Sergeev      04/07/04 02:10      
      RE: ULN2803 Output droping at 3KHz.      Prahlad J. Purohit      04/07/04 04:43      
   RE: ULN2803 Output droping at 3KHz.      Alexander Riabokris      04/07/04 09:16      
      RE: Schematic would help us      IJAZ AHMED      04/07/04 14:02      
   CNY17-3 is the culprit!      Kai Klaas      04/07/04 18:15      
      RE: CNY17-3 is the culprit!      IJAZ AHMED      04/10/04 14:36      
         RE: CNY17-3 is the culprit!      Kai Klaas      04/10/04 16:09      
            RE: CNY17-3 is the culprit!      Michael Karas      04/10/04 22:04      
   RE: ULN2803 Output droping at 3KHz.      Michael Karas      04/08/04 04:25      
      May be Prahlad will inform us now?      Kai Klaas      04/08/04 06:54      
      RE: ULN2803 Output droping at 3KHz.      Prahlad J. Purohit      04/09/04 03:13      
         RE: ULN2803 Output droping at 3KHz.      Steve M. Taylor      04/09/04 04:14      
         RE: ULN2803 Output droping at 3KHz.      Michael Karas      04/09/04 06:32      
   RE: ULN2803 Output droping at 3KHz.      Jacob Boyce      04/09/04 07:54      
      We are still waiting for more details      Kai Klaas      04/09/04 19:18      
         3 kHz ? Stepper motor ?      Raghunathan R      04/10/04 01:00      
      RE: ULN2803.      Abdul Mujid      04/10/04 22:58      
         RE: ULN2803.      Steve M. Taylor      04/11/04 03:51      
         RE: ULN2803.      Michael Karas      04/11/04 03:58      
            RE: ULN2803.      Steve M. Taylor      04/11/04 04:11      
         RE: ULN2803.      Michael Karas      04/11/04 04:14      
            RE: ULN2803.      Michael Karas      04/11/04 04:24      
   RE: ULN2803 Output droping at 3KHz.      Prahlad Purohit      04/11/04 21:15      

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