On 11/2/07, Wojciech Kazubski <[EMAIL PROTECTED]> wrote: > > > > For logic symbols I use a separate power/gnd symbol. > > I have a script that creates the power symbols and removes hidden nets from > > the existing gschem logic symbols --- > > > > http://www.luciani.org/geda/util/util-index.html#create-np-symbols > > > What about the following idea? > 1) Replace "net=xxx" attributes from all symbols winh something other, like > "power=xxx" (an automated tool may use "power=" attributes to guess what > power symbol to use or create) > or > 2b) use small tool that will look for "power=xxx" attributes inside the > symbol and add suitable external "net=xxx" attribure, possibly renaming VCC > net from TTLs and VDD from CMOSes to +5Vd or so if user wants this. > > Recently I had some problems with connecting VSS power supply of 4000 series > CMOS chips to the ground net named GND. Simply connecting two power symbol to > ground doesn't work.
In the power symbols I use there are no net labels so each pin can be attached anywhere. For the logic parts I put all of the power symbols with their decoupling caps in one section of the schematic. If you use a script to connect up the power how do you communicate the connection information to the person viewing the schematic? It seems like it could get confusing in a system with multiple isolated supplies. (* jcl *) -- http://www.luciani.org _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
