At 16:00 22.10.01 -0700, you wrote: >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
Just place pin 3 and 4 on top of each other. After you have connected a wire to this "double-pin", a junction-dot will show this special case. ERC and DRC are happy with this solution. I use this double-pin quite often. Edi Im Hof >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/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
