Re: gEDA-user: Shall we use letters (i.e. E, C, B ) for transsitor pin names?

[Werner Hoch <werner.ho@xxxxxx>]

Hi Stefan,

we have pinlabels and pinnumbers, I guess your speaking about 
pinnumbers?

On Sonntag, 16. Dezember 2007, Stefan Salewski wrote:
> I have read that we can use single letters like "C", "E", "B" as pin
> names -- this makes it simpler to assign the correct footprint to a
> symbol.

> On the other hand, default geda/pcb symbols/footprints seems to use
> digits.

Yes, the footprints are properties of a package. And a package has pin 
numbers like 1,2,3 for simple parts.

You can still add the pinlabels to transistor pins. But as everybody can 
distinguish the different pins in a symbol, it's not necessary to make 
them visible.

On the other side, the pinlabels are useful when your editing a symbols 
with a text editor.

> What is your advice? Is there a fixed correlation between numbers and
> letters, i.e. "B" = "1", ...

I'm using BCE as pinnumber attributes as long the footprint of the 
device (transistor) is not defined. Thus it's easy to replace them when 
adding a footprint.

Regards
Werner


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