15 Apr
2004
15 Apr
'04
2:30 a.m.
--- Brad Parker <brad(a)heeltoe.com> wrote:
- capture the schematic and then do the layout by
hand. you'll find you
spend about 90% of your time creating library
entries for parts and/or
searching the existing libraries for parts which
match.
I found this to be the case too, creating libraires
and getting around the weird quirks some of the CAD
programs have takes LOTS of time.
Sometimes I just bypass capturing the schematic (I
draw it by hand on a piece of paper) and then do the
layout directly using a CAD program. To do this you
must become very familar with each chips pinout, but
this knowledge is good as it makes it very easy to
debug when you get the actual board. This method is
sort of an hybrid between the pre CAD layout days and
the modern full CAD method used today.
Now if I have a cheap, quirk-free CAD program with all
the library parts I needed I wouldn't do this, but for
now its the quickest method for me.
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