X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Message-ID: <1485629830.3072.163.camel@linetec> Subject: Re: [geda-user] PCB antenna question From: "Richard Rasker (rasker AT linetec DOT nl) [via geda-user AT delorie DOT com]" To: geda-user AT delorie DOT com Date: Sat, 28 Jan 2017 19:57:10 +0100 In-Reply-To: References: <1485607260 DOT 3072 DOT 77 DOT camel AT linetec> Organization: Linetec Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 Mime-Version: 1.0 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 Hello Peter, Peter Clifton (petercjclifton AT googlemail DOT com) [via geda-user AT delorie DOT com] schreef op za 28-01-2017 om 16:58 [+0000]: > I'm not at my computer to check, but does it treat it as shorted if > you overlap three pads? > > [ 1 [ ] [ ] 2 ] (middle pad not named) > > I don't recall whether the connection checking code considers the > possibility of connections between pads with different names, but I do > (vaguely) recall there being a work around for the kind of thing your > trying to do. As you learnt though, it isn't something we support in > any easy or elegant way. Unfortunately, this is not the case. Overlapping pads are (correctly) recognized as shorted, regardless of pad name or pin number attributes. The loop antenna example I made has 7 pads in all: 2 'true' numbered pads for the netlist, and 5 pads in a rectangular C shape making up the antenna. No matter what name and/or number attributes I give those 5 pads, PCB signals them as a short between pads 1 and 2, and thus as an error. I also tried approaching the issue from the other side, defining a loop antenna symbol in gschem with pins 1 and 2 already connected through a net (pre-shorted, so to speak). However, PCB doesn't fall for this trick and bluntly keeps flagging this construct as a short, for reasons unknown. Anyway, as said it's not a big deal, mostly because designs usually don't have lots of antennas or other special elements made out of copper traces (e.g. inductors or heating areas). Still it would be nice if the functionality for this could be implemented some day. Thanks for all the replies so far, Best regards, Richard Rasker Linetec -- Linetec Translation and Technology Services Vleerkottelanden 14 7542 MJ Enschede The Netherlands +31-53-4350834 http://www.linetec.nl/ e-mail: rasker AT linetec DOT nl