Re: gEDA-dev: footprint cleanup

[Peter TB Brett <peter-at-NOSPAMpeter-b_dot_co_dot_uk>]

On Monday 28 August 2006 12:48, Dan McMahill wrote:

> Unless someone knows of a real standard for these through hold
> footprints I'd suggest we change to:
>
> ACYm  -> ACYmPdDw{,P}  where m = pin pitch, d = pin diameter (not hole
> size but pin size), w=width (perpendicular to axis), P for polarized.
> For example ACY400P25D200P (yeah I know, it is _long_) would be a 400
> mil pin spacing, 25 mil pin diameter, 200 mil wide polarized part.
>
> RCYm -> RCYmPdDo{,P} where m = pin pitch, d = pin diameter, o = outer
> diameter of the part, P for polarized.  So a RCY200P25D400P would be a
> 200 mil pin spacing, 25 mil pin diameter, 400 mil component diameter,
> polarized.
>
> BREm -> BREmPdDwXl{,P} where m = pin spacing, d = pin diameter, w =
> dimension of the part perpendicular to the major axis, l = dimension of
> part along major axis, P for polarized.  BRE200P25D150X300 has 200 mil
> pin spacing, 25 mil pin diameter, 150 mil x 300 mil package size and is
> non polarized.

Is it possible to just put arbitrary numbers into these? For instance, if I 
try and instantiate a ACY1050 will it complain?

The way the M4 library works isn't really very clearly explained in the 
documentation... or maybe I'm just reading the docs wrong ;)

Peter

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