[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: gEDA-user: Broken TO92 footprint

On Thu, 19 May 2011 14:25:50 -0700
Colin D Bennett <colin@xxxxxxxxxxx> wrote:

> On Thu, 19 May 2011 14:02:58 -0400
> Vanessa Ezekowitz <vanessaezekowitz@xxxxxxxxx> wrote:
> > The discussion about "reinventing the wheel" reminded me:
> > 
> > The TO92 footprint included with PCB does not work with the schematic
> > importer therein.  Try to reference it and the importer complains
> > about missing pins, because it uses numbered pins instead of the
> > B-C-E lettering used in gschem's transistor symbols.   Copy and edit
> > the footprint to use those letters and the importer complains about
> > pin numbers ending in letters.
> Isn't a word of caution in order, since not all TO-92 transistors use
> the same order of B/C/E pins?  Or is the one you've provided the
> standard now? 

Indeed you're right that caution is advised.  The one I provided just duplicates the pin numbering/ordering found in the original footprint; the cheapest transistors these days seem to use exactly the opposite pinout.

"There are some things in life worth obsessing over. ÂMost
things aren't, and when you learn that, life improves."
Vanessa Ezekowitz <vanessaezekowitz@xxxxxxxxx>

geda-user mailing list