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???
12/05/05 13:59
Modified:
  12/05/05 14:09
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 		 #104710 - Red LED.
Responding to: ???'s previous message
Dear Kai,

The inputs are +5V tolerant but I dont trust these LPCs at all so I will keep D8 in place. I have introduced LED too in the design and from next production batch it will be there in all the boards. Can I use any Red LED or there is some specific one. I have also introduced 2.2nF cap in parallel to LED as per your suggestion.

Thanks & Regards,
Prahlad Purohit

List of 35 messages in thread
TopicAuthorDate
LPC922 Comparator Interrupt Problems.            01/01/70 00:00      
   Vcc?            01/01/70 00:00      
      Vcc=3.0 to 3.3 Volts.            01/01/70 00:00      
         Possible causes            01/01/70 00:00      
            Noise could come from comparator itself            01/01/70 00:00      
               Re: Noise from Ground.            01/01/70 00:00      
                  Filter            01/01/70 00:00      
                     Exactly!            01/01/70 00:00      
                  R21 is contaminated            01/01/70 00:00      
                     Hystresis is 1.7 mV            01/01/70 00:00      
                        It's 20mV!            01/01/70 00:00      
                           oops calculation error            01/01/70 00:00      
                              waaaay too small a hysteresis..            01/01/70 00:00      
                                 Not at all !            01/01/70 00:00      
                                    there are (at least) 2 ways to skin this            01/01/70 00:00      
                                       Extreme care??            01/01/70 00:00      
                                          correct, but there has been umpteen post            01/01/70 00:00      
                     Please Suggest some filtering.            01/01/70 00:00      
                        100R plus 47µF            01/01/70 00:00      
                           Re: 100E + 47uF            01/01/70 00:00      
                              Like that...            01/01/70 00:00      
                                 Red LED.            01/01/70 00:00      
                                    Every red LED should work            01/01/70 00:00      
                                       also be aware            01/01/70 00:00      
                                          At 500µA...            01/01/70 00:00      
            Noisy ground?            01/01/70 00:00      
            Re: Possible Causes.            01/01/70 00:00      
               Mains Signalling?            01/01/70 00:00      
                  Mains filtering            01/01/70 00:00      
                     mains filtering            01/01/70 00:00      
                        Very informative!            01/01/70 00:00      
   Problem Frequency.            01/01/70 00:00      
      Filtering will help!            01/01/70 00:00      
         Problem Solved.            01/01/70 00:00      
            Nice to hear!            01/01/70 00:00      

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