X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Subject: Re: [geda-user] shorted pads and the netlist in PCB To: geda-user AT delorie DOT com References: <04df2ed2-45a1-dff5-6f6c-d9b9d5fcca0f AT neurotica DOT com> From: "John Griessen (john AT ecosensory DOT com) [via geda-user AT delorie DOT com]" Message-ID: Date: Tue, 10 Jul 2018 15:43:27 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <04df2ed2-45a1-dff5-6f6c-d9b9d5fcca0f@neurotica.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On 07/10/2018 01:15 PM, Dave McGuire (mcguire AT neurotica DOT com) [via geda-user AT delorie DOT com] wrote: > When I have, for example, a surface-mount voltage regulator that has > an exposed pad that's connected to ground, and I connect it to a plane > for thermal reasons, I get complaints in the PCB Log window about the > net that's connected to the plane being shorted to that pin of the > component, because it's not reflected in the schematic (which may not > have a "pin" for that pin) and is thus not in the generated netlist. I make a custom symbol for such parts that has the pin number on that "exposed pad", just like any other pin. I keep my life simple by always following the datasheet pin numbers. If they do not give a number for a central pad, I give it the last number plus one. I never have seen multiple physically separate pads given the same number in a datasheet, so I don't ever do that either. I do use multiple overlapping pads to make odd shaped footprint pads, (except not any more using pcb-rnd, since pads can come from shapes or polygons).