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???
11/18/09 08:25
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#170925 - question for wire wrapping and some clarification
Responding to: ???'s previous message
hi again,

about wire wrapping,
I had not heard about wire wrapping but similar thought had come to my mind, however i gave up on the idea thinking it may not be as robust as a solder-less board.

Now since you have mentioned it, after studying about wire wrapping on the internet I have one question left, what kind of poles to be used? can i use a thick ( 240 volts rating ) copper wire cut into 1 cm length as a pole, and use thin single strand copper wire for wrapping?
i have a drill with 0.5mm drill bit and a wooden sheet of around 3-5 mm thickness wont cost much, should it be enough?
i.e. : thin wooden sheet, thick solid copper wire poles and thin copper wire for wrapping, 40 pin socket , 4mhz crystal connected to socket (xtal pins) through very short (< 0.5cm) thin copper wire + caps.


clarification
my target was for a simple functioning circuit of 89s52, thats why all the code does is switches on the led.
I wanted to have a basic understanding of 89s52 hence the breadboard was used.
when i said it even works without decoupling, it is similar to a car being crash tested and the manufacturer saying you have a chance of surviving that in X percent cases, I simply wanted to find out the different outcomes,
similarly i tried the 4aa batteries, i was only trying to find if there is any possibility of its working say 1 in a 100 times with that voltage.

if you ask me what standard circuit i have chosen for my actual(non experimental ) application of 89s52? well , I still have to finalize it yet, however it will have proper decoupling for sure, and proper power input etc.

So you see guys i really meant it when i said i was fairly new to this.
hence i need to experiment more to understand what all you great intellects have already understood and are generous enough to share with me.

by experimenting just with simple program, i have been able to solve problems in advance, imagine a complex program and a lot of modules etc with a complex circuit, imagine the time you would have taken to understand the problem, imagine the irritation I would have gone through to type all this and that etc. now at least i will be sure that the power supply area , coupling etc. will not be the cause for a problem if it arises in the future circuits, that i may design.

once again thanks for all the help, for giving me good luck and for time spent on reading this particularly lengthy post.


List of 77 messages in thread
TopicAuthorDate
a simple 89s52 based led circuit on the breadboard            01/01/70 00:00      
   22uF?            01/01/70 00:00      
      He's probably wondering what GNG is            01/01/70 00:00      
         Yep, I also wonder.... Already edited!            01/01/70 00:00      
      yes my bad, its 22pf not uf            01/01/70 00:00      
         Lots of nice info in datasheets and application notes            01/01/70 00:00      
         your problem identified            01/01/70 00:00      
         Yes...            01/01/70 00:00      
   I see no decoupling            01/01/70 00:00      
   Some hints...            01/01/70 00:00      
   similar problems when i was an infant enthusiast            01/01/70 00:00      
      NO!            01/01/70 00:00      
         a simpler solution            01/01/70 00:00      
            Of course...            01/01/70 00:00      
   Will post results in a week or soo            01/01/70 00:00      
      Maybe it is your program            01/01/70 00:00      
         How would that happen?            01/01/70 00:00      
            wandering into Enchanted Forest            01/01/70 00:00      
               about those test spec's            01/01/70 00:00      
                  Thorough testing? Often an illussion!            01/01/70 00:00      
                     testing is an illusion            01/01/70 00:00      
                        Agreed, with caveats            01/01/70 00:00      
                           Still same problem - no problem seen doesn't prove anything            01/01/70 00:00      
                              I've been saying that for years ...            01/01/70 00:00      
                                 for the umpteenth time            01/01/70 00:00      
                                    You should learn how to spell those words you like            01/01/70 00:00      
                                       I quoted you            01/01/70 00:00      
                                          Yes, but you "tracked down" nothing!            01/01/70 00:00      
                                             I recall the previous occasions ...            01/01/70 00:00      
                                                Focus on the circumstances            01/01/70 00:00      
                                                   'investigation' vs 'reasoning'            01/01/70 00:00      
                                                      Reasoning vs. investigation was popular for millenia            01/01/70 00:00      
                                                         Reasoning            01/01/70 00:00      
                                                            Ptolemy and Eratosthenes...            01/01/70 00:00      
                                                               seek to find game: facts, evidence, philisophy            01/01/70 00:00      
                                                                  Reasoning works fine if you don't omit/ignore the evidence            01/01/70 00:00      
                                 I only do what the manufacturer urged me...            01/01/70 00:00      
                                    Yes, Kai, you did that            01/01/70 00:00      
                                       can't you read            01/01/70 00:00      
                                          That's not what you were complaining about!            01/01/70 00:00      
                                       Please read this document...            01/01/70 00:00      
                                           I read that the first time you mentioned it.            01/01/70 00:00      
                  not perfect and never perfectly debugged            01/01/70 00:00      
                     It's the difference between "good" and "good enough"            01/01/70 00:00      
            Not necessary...            01/01/70 00:00      
               Neither way fixes anything.            01/01/70 00:00      
                  it might not be 'harmless'            01/01/70 00:00      
                     Watchdog should be used for anything semicritical            01/01/70 00:00      
                  Of ourse, illjumping must not happen!!!            01/01/70 00:00      
                     What "depending on"?            01/01/70 00:00      
                        Relax, not you...            01/01/70 00:00      
                           What do you use to "pet" the dog?            01/01/70 00:00      
                              hw timer isr för watchdog kick is dangerous            01/01/70 00:00      
                              Different instructions in different parts of the code!            01/01/70 00:00      
                              why use ALE?            01/01/70 00:00      
                                 Why indeed?!            01/01/70 00:00      
                                    The REAL problem lies in what it tells you.            01/01/70 00:00      
                                       please find just one that ...            01/01/70 00:00      
                                          the typical switcher ripple is too much            01/01/70 00:00      
                                             Have you ever observed            01/01/70 00:00      
                                                ... glad you asked that ...            01/01/70 00:00      
                                                   Only you, Richard            01/01/70 00:00      
                                                      that's not what you were asked, Erik!            01/01/70 00:00      
                                                         Nothing much            01/01/70 00:00      
                                                            We can let others conclude what they will            01/01/70 00:00      
                                 because ...            01/01/70 00:00      
                                 It's what the mfg tells us to use ...            01/01/70 00:00      
   Problem solved!            01/01/70 00:00      
      correction            01/01/70 00:00      
      Driving car with closed eyes...            01/01/70 00:00      
         sleep driving            01/01/70 00:00      
            Of course!!!            01/01/70 00:00      
      thanks for WHAT            01/01/70 00:00      
      No ... You only THINK it has been solved.            01/01/70 00:00      
         question for wire wrapping and some clarification            01/01/70 00:00      
            Rectangular pins that cuts into the wire            01/01/70 00:00      
            If you were to adopt this technique ...            01/01/70 00:00      

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