RE: gEDA-user: LED 100 != 5mm LED ?

[kiu <kiu@xxxxxxx>]

Hi Bert,

youre right, the "100" defines the silk not the pin distance. So 100 is a wrong
value for 5mm LEDs. Is this a bug in the m4 template ?

There seems to be no bounding box (like in the hole_m3.fp) which makes it
difficult to place LEDs correctly without a collision, if the silk is displayed
too small. Should i use "LED 197" as a footprint ?

Kiu

Quoting Bert Timmerman <bert.timmerman@xxxxxxxxx>:

> Hi kiu,
>
> Sofar, you're probably doing nothing wrong here.
>
> At least you found geda and made the step into the world of free software.
>
> AFAIK, the 5 mm relates to the outer diameter of the body of the LED.
>
> 5mm LEDs have a pin spacing of approx. 2.54 mm --> 100 mil, this is correct
> for the 5mm LEDs (green.fp, red.fp, blue.fp in optical).
>
> Or are you refering to the diameter of the body on the silkscreen, this is
> approx. 150 mil and this is indeed a bit small value for a 5 mm LED.
>
> BTW there happens to be a pcb-20070208p1 release of pcb which doesn't use m4
> anymore, only newlib footprints.
>
> The directories have not been merged, that is, m4 derived footprints in the
> newlib format live in lib/pcblib-newlib and the newlib contains the
> footprints according to the newlib format.
>
> Confused, you won't be after the next episode of this soap ...   ;-)   (no
> pun intended)
>
> Kind regards,
>
> Bert Timmerman.
>
>
> -----Oorspronkelijk bericht-----
> Van: geda-user-bounces@xxxxxxxxxxxxxx
> [mailto:geda-user-bounces@xxxxxxxxxxxxxx] Namens kiu
> Verzonden: zondag 11 februari 2007 0:30
> Aan: geda-user@xxxxxxxxxxxxxx
> Onderwerp: gEDA-user: LED 100 != 5mm LED ?
>
> Hi,
>
> in geda/share/pcb/m4/optical.m4 a 5mm LED footprint is defined as "LED 100".
> But if i print it my LEDs are to small.
>
> Shouldnt it be 5mm/0.0254mm = 197 mil instead ?
>
> I am a (g)eda newbie - am i doing something wrong ?
>
> Thanks in advance...
> --
> kiu
-- 
kiu


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