On 19 Jun 2008 at 13:39, Rick Collins wrote: > I think I see where you are headed with this and I don't think it is a > good idea. You want to add vias to act as pads for the jumper > resistors, right? That may get you pads on the board, but you won't > have an entry in the XYRS file for the jumper! > > I would suggest that you first try to lay out the board without > jumpers and see how far you can get. If you are not using fine pitch > parts and can route signals between pins, you should be able to get a > pretty high percentage of nets routed without jumpers. Then adding > jumpers to the schematic should only take one or two iterations. If > your board is crowded or your parts are fine pitch, this won't work so > well. > > But I don't think using vias as pads is a good idea at all. > > If you really must use vias as pads, you can pick a unique drill size > and then just remove all references to that drill size from the drill > list. This will be "manual" editing of the drill list, but it can be > semi-automated using search features in any editor. > > Rick > I use testpoints for pads for jumpers. On your schematic you can place a test point component and draw a line(not a wire) between. Then on the PCB, the TP pads will appear since it is a component. I then draw lines on the silkscreen layer showing the jumper connections. You could also make up a special schematic library component that has the 2 pads. Then make up a special pcb module with the pads and a line on the silkscreen layer showing the jumper location. The disadvantage to this is you would have to know ahead of time the distance between the 2 pins(that's why I use singe test points - they can be moved at will when doing the layout.)
Dave - WB6DHW <http://wb6dhw.com>
