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???
04/12/07 13:43
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#137036 - I am working on it...
Responding to: ???'s previous message
Erik Malund said:
so, for the amateur of tomorrow the first thing to learn is how to deal with SMT.

Even for professionals, sometimes. I am currently struggling to weld on 2 LEDs and a pushbutton onto a chip with 0.5mm pin spacing in an existing design, as the new PCB is not justified until I prove I am able to make them working in software. Of course I am able to put a (legged) SMD chip onto a PCB if any available...

The next step is the leg-less chips (BGA, MLT, CSP and similar), which also tend to have increasing popularity, due to lower mass-production cost. Then, even the professionals of smaller enterprises will have to rely largely on 3rd party service to get their prototypes and rework done.

Erik Malund said:
Maybe a 'cottage industry' of mounting SMT chips on DIL sized PCBs will spring up.

While there might be similar available, I am working on it already (reasons see above). Hold on, I'll provide details when it will be ready. Although I'd not call it 'industry', rather, small scale service for the amateurs.

Erik Malund said:
The problem then will be flying wires and the faster risetimes of tomorrows chips.

To a certain degree, yes; but in this case it is the same die which worked in DIP40 already... And many chips are slow enough, it's just the unavailability (or unattractivity) of the package. Of course, adding a decoupling cap or two is easy.

JW


List of 20 messages in thread
TopicAuthorDate
AT89C51RD2/ED2 not in DIP40 anymore...            01/01/70 00:00      
   PDIP 40s are endangered            01/01/70 00:00      
      so, for the amateur of tomorrow            01/01/70 00:00      
         I am working on it...            01/01/70 00:00      
            Possible aid to protoyping for amateur            01/01/70 00:00      
               whatever that is, a solder mask is mandatory            01/01/70 00:00      
                  Spacing critical            01/01/70 00:00      
                     Steve, when will you in UK go really metric?            01/01/70 00:00      
                        When            01/01/70 00:00      
                           not really            01/01/70 00:00      
                              Sure            01/01/70 00:00      
                  I have some adapters ...            01/01/70 00:00      
                  I make my own PWBs            01/01/70 00:00      
                     "homemade" solder mask            01/01/70 00:00      
                        eccentric moi???            01/01/70 00:00      
                     What sort of tolerances?            01/01/70 00:00      
         Maybe not...            01/01/70 00:00      
            too bad ...            01/01/70 00:00      
               demand            01/01/70 00:00      
                  I'm not so sure ...            01/01/70 00:00      

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