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???
12/28/09 14:37
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#171983 - Thoughts
Responding to: ???'s previous message
  • Can you control the rise & fall times of the PWM, so that the edges aren't so steep? "slew-rate limiting"

  • Can you synchronise the data & PWM clocks so that data is not being read at the same time as any PWM edge?

  • List of 96 messages in thread
    TopicAuthorDate
    LED Display Panel reliability            01/01/70 00:00      
       Serial out/serial in            01/01/70 00:00      
       you do not say            01/01/70 00:00      
          TB62706BFG            01/01/70 00:00      
       Decision by majority...            01/01/70 00:00      
       I would use CRC            01/01/70 00:00      
          I think you missed the point            01/01/70 00:00      
             Reading back the parallel outputs then?            01/01/70 00:00      
                actually not            01/01/70 00:00      
                   "If" it is identical data...            01/01/70 00:00      
                      Only the bits in error will generate any flicker            01/01/70 00:00      
                         But he wants perfection!            01/01/70 00:00      
                         all the above            01/01/70 00:00      
                            So, there is a chance for flickering after all?            01/01/70 00:00      
                               If incorrectly designed            01/01/70 00:00      
                      trust and trust            01/01/70 00:00      
                      trust            01/01/70 00:00      
                         layout, layout, layout            01/01/70 00:00      
                         Some hints...            01/01/70 00:00      
                            excellent proposal!            01/01/70 00:00      
                               Principle of function...            01/01/70 00:00      
                            Main EMI Source            01/01/70 00:00      
                               Thoughts            01/01/70 00:00      
                                  I do not know your part, but ...            01/01/70 00:00      
                                     Duplicate thread            01/01/70 00:00      
                                     Replies            01/01/70 00:00      
                                  double posted            01/01/70 00:00      
                                  reply            01/01/70 00:00      
                               RC-filtering and Schmitt-Triggers will help!            01/01/70 00:00      
                                  response to above            01/01/70 00:00      
                                     Why???            01/01/70 00:00      
                                        maybe today            01/01/70 00:00      
                                           Hardly...            01/01/70 00:00      
                                              no            01/01/70 00:00      
                                                 Wild speculations...            01/01/70 00:00      
                                                    Mahmood            01/01/70 00:00      
                                                       No fun to poke about in a fog...            01/01/70 00:00      
                                                          The clock on top            01/01/70 00:00      
                                                       yes            01/01/70 00:00      
                                                 He's not required to scroll            01/01/70 00:00      
                                                    absolutely, but            01/01/70 00:00      
                                              You're right, Kai, but the frequent refresh costs less            01/01/70 00:00      
                                                 Again...            01/01/70 00:00      
                                                    it is, indeed!            01/01/70 00:00      
                                                       not only then            01/01/70 00:00      
                                                          PWM with the TB62706??            01/01/70 00:00      
                                                             YES, of course there is            01/01/70 00:00      
                                                                Yes, I understand, but...            01/01/70 00:00      
                                                                   Good question            01/01/70 00:00      
                                                                      Digital potentiometer?            01/01/70 00:00      
                                                                         the problem here is            01/01/70 00:00      
                                                                            It seems they can be hooked together...            01/01/70 00:00      
                                                                               Look at this too...            01/01/70 00:00      
                                                                                  Ok, then show me ...            01/01/70 00:00      
                                                                                     And write?            01/01/70 00:00      
                                                                                        :)            01/01/70 00:00      
                                                                                     Mahmod doesn't have multicolor LEDs!            01/01/70 00:00      
                                                                                        well, what is this then?            01/01/70 00:00      
                                                                                           Question for Mahmod            01/01/70 00:00      
                                                                                              Looks like...            01/01/70 00:00      
                                                                                              Yes            01/01/70 00:00      
                                                                                           Why from the same chip???            01/01/70 00:00      
                                                                                              limiting color choices to 'per chip'            01/01/70 00:00      
                                                                                                 What flexibility?            01/01/70 00:00      
                                                                                                    well, if ...            01/01/70 00:00      
                                                                                                       Dials            01/01/70 00:00      
                                                                                                          just to clarify            01/01/70 00:00      
                                                                                                             Length of chain shouldn't really matter            01/01/70 00:00      
                                                                                                             Single color LEDs            01/01/70 00:00      
                                                                                                                Vled only            01/01/70 00:00      
                                                                                                                Two questions...            01/01/70 00:00      
                                                                                                                   Answers            01/01/70 00:00      
                                                                                                                      What range?            01/01/70 00:00      
                                                                                                                         Blue            01/01/70 00:00      
                                                                                                                            I would do it like that...            01/01/70 00:00      
                                                                                                                               thanks            01/01/70 00:00      
                                                                                                                                  Why?            01/01/70 00:00      
                                                                                                                                     Board to Board Hopping            01/01/70 00:00      
                                                                                                                                        Of course...            01/01/70 00:00      
                                                                                                                                        one advantage, the other is ..            01/01/70 00:00      
                                                                                                                                           Not 40xx Chips As Generic Family            01/01/70 00:00      
                                                                                                                                              Clock skew?            01/01/70 00:00      
                                                                                                                                                 Still very very helpful...            01/01/70 00:00      
                                                                                                                                                    There are lower-resistance solutions            01/01/70 00:00      
                                                                                                                                                       On-resistance is beyond any doubt...            01/01/70 00:00      
                                                                                                                                                          I've used several '66s            01/01/70 00:00      
                                                                                                                                                             without any opinion of the 4066 option            01/01/70 00:00      
                                                                                                                                                          I didn't intend to suggest that it was wrong, Kai            01/01/70 00:00      
                                     All the filter is supposed to do is limit the slew rate            01/01/70 00:00      
                                        no, not the slew rate            01/01/70 00:00      
                                           Scope plot?            01/01/70 00:00      
                                              Maybe later on            01/01/70 00:00      
                                           Yes, that's true, but his worry was about his clocking            01/01/70 00:00      
                                              Great            01/01/70 00:00      
       suggestion            01/01/70 00:00      
       Problem Solved!!!!!!            01/01/70 00:00      

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