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???
08/17/05 20:30
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 		 #99598 - I do not work with white LEDs but with r
Responding to: ???'s previous message
i don't know the response time of the LEDs
I do not work with white LEDs but with red, green and blue. My minimum on time is 1/32 millisecond and that works with the LEDs I use. If you look at enough datasheets, you will find some that list "reaction time".
6000 RPM is 100 RPS so, even 1/10 millisecond might work (1/100 of a rev illuminated). Again, I do not know your app, but here it is. Obviously the intensity my be a problem in your application, when the on time is so short.

Erik

List of 45 messages in thread
TopicAuthorDate
Tachometer and engine timing tool            01/01/70 00:00      
   Engine analyser            01/01/70 00:00      
      RE : Engine analyser            01/01/70 00:00      
         Engine analyser            01/01/70 00:00      
            Xenon Flash Lights            01/01/70 00:00      
               Xenon flash lights            01/01/70 00:00      
                  Calculating RPM            01/01/70 00:00      
                     RE: Calculating RPM            01/01/70 00:00      
                  flash charge circuit            01/01/70 00:00      
   Look at this then            01/01/70 00:00      
      I like it...            01/01/70 00:00      
   Xenon            01/01/70 00:00      
      Delay time < 10us            01/01/70 00:00      
   Led Instead Xenon            01/01/70 00:00      
      Interesting idea, were I to make sutch a            01/01/70 00:00      
         White is better for finding the TDC mark            01/01/70 00:00      
            If white light is required and what I ha            01/01/70 00:00      
               Good link            01/01/70 00:00      
      Nice !!            01/01/70 00:00      
         I do not work with white LEDs but with r            01/01/70 00:00      
            White LED            01/01/70 00:00      
               got curious and googled            01/01/70 00:00      
               got curious and googled            01/01/70 00:00      
               Hmm            01/01/70 00:00      
                  Sure it's not, but            01/01/70 00:00      
                     New prototype circuit            01/01/70 00:00      
                        I would recommend a constant current cir            01/01/70 00:00      
                           Current regualtor            01/01/70 00:00      
                              C2 may blow your LED, what is it there f            01/01/70 00:00      
                              Led ON time            01/01/70 00:00      
                                 6000 RPM            01/01/70 00:00      
                                    6000RPM            01/01/70 00:00      
                                       Can't comment on that now            01/01/70 00:00      
                  saw an article and while this probably            01/01/70 00:00      
                     Thanks            01/01/70 00:00      
                        timing light            01/01/70 00:00      
                           unanswered questions            01/01/70 00:00      
                  White LED v Xenon tube            01/01/70 00:00      
                     'difficult' to drive            01/01/70 00:00      
                        Big LEDs            01/01/70 00:00      
                           So Thats it !            01/01/70 00:00      
                              Who has said ir has to be just one, can            01/01/70 00:00      
                                 C is for stability ?            01/01/70 00:00      
                     I have no idea, but I have seen I do not            01/01/70 00:00      
                        White LED 'drivers'            01/01/70 00:00      

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