I just received 5 different double sided boards with a combination of SMD and
thru-hole devices. Schematic with GSCHEM and layout with PCB.
For jumpers I create a third layer. You then use via's to get to this dummy
layer and trace to simulate the jumper. Just don't send the board shop
that layer.
George
On Wed, 2006-08-09 at 19:08 +0200, Stefan Salewski wrote:
Hello, I have created a schematic with gschem and converted it to a pcb file using gsch2pcb. Now I try to do the layout. I will do a two sided layout, bottom side should be a ground plane with no components and only a few signal traces. On top side I have SMD parts and a few conventional parts which needs holes in pcb board. Has anybody done such layout successfully with pcb (PCB version 20060422)? For testing I have created a very small board with an OPAMP with DIP footprint, two resistors in SMD (1206 footprint), two capacitors in SMD (1206 footprint) and some headers for signal and power. Without a ground plane, autorouting works. But with ground plane I was not able to get a correct layout. Autorouter is generating shortened nets, Optimizer removes necessary vias... And I was not able to fix these errors manually. Unfortunately there is no tutorial for this process. I have found some advice in this mailing list and gEDA wiki, but it will not work for me. Additional question: In a complicated layout it may be impossible to layout all traces, so one has to use short isolated copper wires (Drahtbruecken) or SMD-resistors with zero ohm resistance to make some connections. How can I do this? Best regards Stefan Salewski _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
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