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???
03/01/05 08:39
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#88750 - Contradictory requirement!
Responding to: ???'s previous message
Russell Bull said:
For outdoor signs he suggested using a temperature sensor to ensure the leds aren't run too bright when the sun is shining on the box heating it up.

That's a bit of a blow!
Surely, it is precisely when the sun is shining on the box that you need the LEDs at their brightest in order to be seen in the sunlight!

Life is cruel! :-(



List of 20 messages in thread
TopicAuthorDate
Further thoughts on large LED displays            01/01/70 00:00      
   Practical findings            01/01/70 00:00      
      I'd agree            01/01/70 00:00      
         cost...            01/01/70 00:00      
         Except            01/01/70 00:00      
            Heatsinking            01/01/70 00:00      
               Luxeon heatsinking            01/01/70 00:00      
               Much brighter discrete LEDs            01/01/70 00:00      
            5 x 8 matrices            01/01/70 00:00      
               size            01/01/70 00:00      
   Contradictory requirement!            01/01/70 00:00      
   This works            01/01/70 00:00      
   "spider" LEDs are cool            01/01/70 00:00      
      but that requires            01/01/70 00:00      
         ...and also...            01/01/70 00:00      
         track width            01/01/70 00:00      
            1 mm track            01/01/70 00:00      
   Display of LED problems            01/01/70 00:00      
      color code            01/01/70 00:00      
   Big sign            01/01/70 00:00      

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