On May 31, 2010, at 11:30 AM, Mike Bushroe wrote: > 2) I found that several IC have no power. I know that John Doty does > not like to have his schematics cluttered up with surperfluous Vcc and > Gnd connections.
No, I (and others) tend to use separate power symbols, like: http://www.gedasymbols.org/user/kai_martin_knaak/symbols/digital/74_pwr.sym Thank you Kai-Martin! > But at the other extreme, I just discovered that > 7404-1.fp has implicit connections to Vcc and Gnd nets in non-printing > attributes, but the identical looking 7404-4.fp does not. I believe you are confusing pcb footprints with gschem symbols. They are very different things. > Is there some > way to indicate which symbols are powerless and which have non-printing > power connections built in? >From command line: grep net= `locate name-of-symbol.sym` >From gschem: 1. Select the symbol. 2. Hierarchy>Down Symbol 3. Edit>Show/Hide Inv Text 4. Look for net= attributes. > This is especially important in quads and > hex parts that have many slots. And is there a way to change the symbol > used without deleting the instance and re-entering all the data by > hand? The .sch file is text, so a global change of of the symbol name does the trick. > I don't gattrib allows changing the actuacl symbol file used, > just a few of the attributes. These problems are why I recommend making project-specific copies of symbols rather than using the library symbols as-is. John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ [email protected] _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
