Stephrac74 wrote:
> I’ve not checked before drawing the PCB that the module was ok…. And what a 
> mistake !


I've run into the same problem on high end commercial packages - there is a 
high rate of errors in 
the parts libs. I almost always spend half my time defining new parts - there 
are several reasons:

1 - Most large chip library parts don't have the pin placement organized 
logically.  schematics 
ought to convey information in an understandable form - not just hacked 
together connections.

2 - I always bring out a real ground and power pin - using auto connect sounds 
like a time saver - 
but real circuit boards need ground and power nets that are designed to 
minimize ground noise. Even 
on multi layer boards with dedicated power layers there becomes the issue of 
separating analog and 
digital grounds - knowing how to split ground and power plans for A/D converter 
areas and high gain 
input sections is a must.

3 - added fields that make procurement, ECO, multi source etc. - unless you 
hate the buyer.

This is tedious time consuming work - but it pays in the end.  My hunch is that 
open-libraries will 
end up with lower error rates - should be a field that says who (email) is the 
maintainer of a 
library part so corrections can be sent off.


--------------------------------------------------------------------------------
Karl Schmidt                                  EMail k...@xtronics.com
Transtronics, Inc.                              WEB http://xtronics.com
3209 West 9th Street                             Ph (785) 841-3089
Lawrence, KS 66049                              FAX (785) 841-0434

Let us live so that when we come to die even the undertaker will be sorry.
-- Mark Twain

--------------------------------------------------------------------------------


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