I've always handled this by making the symbol and footprint match. In other words - you need a 3-pin symbol to match your 3-pin footprint. There is a "NC" gschem symbol in the library for this purpose. You do have to be careful of how gnetlist handles the "NC" net. It should not appear in the netlist given to PCB.
Joe T
On Tue, Aug 5, 2008 at 9:42 PM, Ed & Angie S.
<edangies@xxxxxxxxx> wrote:
I know through the years there has been a lot of
discussion on this issue but I haven't been able to find the answer to my
problem after searching the archives. I'm wondering how to refer to a 3
pin footprint with a two pin schematic symbol as is the case for a sot23
diode. My actual question is probably simple for the experts out
there. I've already created a special symbol for a sot23 diode. The
actual symbol graphic is a normal diode that has 2 pins, pin 1 and pin3. I
believe I need to specify a pin 2 in the symbol textually somehow so that PCB
layout software will match its 3 pin footprint to a schematically defined 3 pin
device. How do I annotate the gschem symbol for a pin 2 without a
graphical entity to assign the pin to. It's a no connect or unused pin so
it needs no graphic but the symbol does need to have 3 pins when the netlist is
generated for layout.
Thanks
Ed
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