> On Oct 1, 2008, at 5:52 AM, Wojciech Kazubski wrote:
> > Maybe nesting the light component inside a heavy one is the solution?
> > Something like
> >
> > C 42300 41300 1 0 0 7400-1.sym
> > {
> > C 44100 44900 1 0 0 nand-1.sym
> > T 44100 44900
> > device=74HC00
> > T 44100 44800
> > footprint=DIL14
> > ...
> > }
>
> This has the general flaw that all instance-based solutions have: if
> the next project needs the same circuit at twice the speed, you have
> to track down every nand-1 instance and change it to, say 74AHC00.
> But if you have a project NAND symbol, you only have to fix that
> symbol: you don't even need to change the schematic at all.
>
>
> John Doty Noqsi Aerospace, Ltd.
> http://www.noqsi.com/
> [EMAIL PROTECTED]
>
It is possible to define custom symbol, "my-project-fast-nand.sym", for
example, containing only the reference to one of possible 74xx00 IC's.
Wojciech Kazubski
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