You could edit the sch library symbol and put pins 3 and 4 on top of the collector pin. It will show up in the schematic only as a junction when you wire to the collector pin.
Regards, Tom. > -----Original Message----- > From: Daniel Webster [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, 23 October 2001 10:01 AM > To: Protel EDA Forum > Subject: [PEDA] TO-3 footprint question > > > > Hello everyone: > > I have created a footprint for a TO-3 NPN transistor. The > TO-3 can as you > may be aware has two mounting holes, in my case these two > mounting holes are > attached to the collector of the transistor. I have a pad for > each mounting > hole which I have labelled pad 3 and pad 4. Now when I create > my schematic > symbol for this part, I am supposed to use the standard NPN transistor > symbol, which only has 3 pins (E-1,B-2,C-3). If I want to > display a 4th pin > and connect it to the collector on my symbol, I end up with > an odd looking > transistor symbol, that know one will understand or > appreciate. If I hide > pin 4, as someone suggests, then I can not hook it up to the > desired net. If > I omit pin 4 from the schematic and reload the netlist into > the pcb, the > program will attempt to disconnect pin 4 from it's net, and > if I manually > connect it I will get a DRC error. I would like the schematic > and pcb to > match with no netlist hickups. I do not see anyway around > this problem, > other than to live with the DRC error, or create an > additional pin on the > schematic symbol, neither of which seem a very elegant > solution. Perhaps I > should suggest to Protel that with their new version, they > allow a single > pin to be assigned to more than one pad. In fact it would be > very useful to > have a single pad assigned to different nets with no DRC > error, in order to > form a star point gnd. Any comments or suggests would be appreciated. > > Thanks, > Daniel Webster > PCB Designer > Northern Airborne Technology > Kelowna, BC, Canada > Email: [EMAIL PROTECTED] > > > > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * > * To post a message: mailto:[EMAIL PROTECTED] > * > * To join or leave this list visit: > * http://www.techservinc.com/protelusers/subscrib.html > * - or email - > * mailto:[EMAIL PROTECTED]?body=leave%20proteledaforum > * > * Contact the list manager: > * mailto:[EMAIL PROTECTED] > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
