On Jul 21, 2010, at 1:03 PM, Richard Rasker wrote: > Hello, > > I'm a happy GSchem + PCB user for quite a few years now, but I'm still > puzzled about one aspect of defining symbols and footprints, and that is > "special" pins and pads. With "special" I mean the following types of > pins/pads: > > - Internally connected pins and pads, e.g. SO8 MOSFETs with > S on pins 1-3, G on pin 4, and D on pins 5-8. I can of course create a > GSchem symbol with 3 pins for S and 4 pins for D, but is there a more > elegant way in GSchem to deal with this?
Well, I'm not saying this is more elegant, but it is different: You can create a copy of the SO8 footprint where the S pins all have the same pin number, and the D pins all have the same pin number. It keeps the gschem symbol looking 'normal'. > > - So-called "don't care" pins and pads, e.g. mounting pads for SMD > connectors. I found that I can at least connect these to each other when > I give them all pin number 0 (zero), but I can't connect these to any > net (e.g. Gnd) in the circuit without the DRC check crying foul. Is > there a way to define these pads in such a way that PCB doesn't care to > which net each one is connected? In every case I've had in my own design so far, these pads are all connected to ground anyway, so I just give these pads the same pad number as the ground pin. -dave _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
