On 03:27 PM 22/05/2001 -0400, Bryan Bernesi said:
>Hello,
>
>Although I have successfully completed one project, I am experiencing a
>rather strange problem; I am trying to make a board that contains
>components with multiple parts e.g. 4093, LM358. The board also has
>besides ground, +5V and +12V supplies.
>
>When I "UPDATE PCB" I can see that the ratsnest for +5v and +12v are
>either not connected or VCC and GND of the IC are connected together but
>not connected to the rest of the VCC and GND nets.
>
>The problem seems to appear only to power and GND pins of a multipart
>component. Everything else seems to be OK.
>
>Any help with this problem would be appreciated.
>
>Regards,
>
>Bryan
There goes those hidden pins again.
1) Look up help on hidden pins and hidden pin connectivity
2) go to the sch library part
3) unhide every pin on all of the parts of the multi-part component (noting
the multiple VCC and GND pins that Protel insists on adding to most of
their multi-part symbols - remove them from all but one or make a separate
power part) - save to your own library
4) repeat in perpetuity for all new Protel supplied parts that you use
5) swear at Protels flawed hidden pin connectivity lot
6) calm down
7) decide to build your own library of sch symbols and keep well away from
hidden pins, forever
Note for Terry and Abd ul-Rahman (supporters of hidden pin connectivity
from memory):
My opinions of course - others say they like hidden pin connectivity. But
I see beginners trapped with it so often that I think it should not be the
default setting. Unfortunately all of Protel Sch libraries use the mis-feature.
Ian Wilson
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