Re: gEDA-user: sot23 diode symbol

["Ed & Angie S." <edangies@xxxxxxxxx>]

All,

Thanks for the help on the sot23 diode.  The symbol with just two pins 
numbered 1 and 3 went into the layout tool just fine.  I really thought I 
needed to have a virtual pin 2 specified somehow but this seems to not be 
the case.  I will also check out the symbols created by others to see how 
they have been built.  I have run into sot23 numbering inconsistencies 
between manufacturers in the past and had to respin a board as a result so 
I'm picky when it comes to this package.  Thanks again.

Best Regards,
Ed Schurig

----- Original Message ----- 
From: "Dan McMahill" <dan@xxxxxxxxxxxx>
To: "gEDA user mailing list" <geda-user@xxxxxxxxxxxxxx>
Sent: Wednesday, August 06, 2008 3:37 PM
Subject: Re: gEDA-user: sot23 diode symbol


> DJ Delorie wrote:
>> gschem symbols do not have to have the same number of pins as the
>> footprints you use.  Feel free to put a diode in a DIP-40 footprint.
>> The only key is that the pin *numbers* have to match.  So, if you have
>> a sot-23 footprint diode that uses pins 1 and 3, you can't use a
>> gschem diode that uses pins 1 and 2.  Be careful of anode/cathode
>> matching too.
>
> Especially be careful about anode/cathode matching in an SOT-23.  That
> particular package is notorious for having a whole bunch of minor
> mechanical and pinout (if a pinout difference can ever be considered
> minor) changes across vendors.
>
> -Dan
>
>
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> 




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