X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=NAy5xpF4Zll2qIP3TZ6KJE+yo0bTtfp9aSPQLl8HoqI=; b=wcr6ZQfl7Z3Um9gghYMYjsnLScaDVBY+hdTl9pC9G/ov8SygkwnG75gJpSymQ8K+cm lMHf8J7PCYdt/jXrwb+UCwqtKkX5iqIglpFGtvhUYIKeYlNDP5kRbqcGjSbLgLPWa0cb OT3B+yOcea6cin3O+SFeQ8imIlj9XcYub3MKDDhM37n+qzjoWSkDFgVYn0jayE8FOUv2 3ip5U5uInj6ZjcQcZoW8bUJNb+lwZlmwHFiF6/eIt87HAQDoBOYg58oF80dmbKC2pyqx VGHq/pRP1fKB8OQvoEd51FGrwp/QDJCTnC9nA4oBK5ZCgwGc3jc13DW5fPl2DtrGC0do BJBQ== MIME-Version: 1.0 X-Received: by 10.152.6.41 with SMTP id x9mr2130378lax.120.1440690964029; Thu, 27 Aug 2015 08:56:04 -0700 (PDT) In-Reply-To: References: Date: Thu, 27 Aug 2015 11:56:03 -0400 Message-ID: Subject: Re: [geda-user] [pcb-rnd] parametric footprint: dimensions, qf(), qfn() and tqfp() From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" To: geda-user AT delorie DOT com Content-Type: text/plain; charset=UTF-8 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 Thu, Aug 20, 2015 at 6:42 PM, wrote: > Hi all, > > I've implemented two major features in the parametric footprint support in > pcb-rnd (and in the online version). > > The preview tool, fp2anim, can display dimensions on the annotation layer. > This is useful for checking whether a footprint really matches the > datasheet. Details: > http://repo.hu/projects/pcb-rnd/devlog/20150820a_dimensions.html > > The more important feature is a new class of footprints. There is a low > level, generic, but complicated to use qf() which should be able to generate > anything that has evenly spaced pads around a rectange. > > There are frontends to qf(), called qfn(), tqfp() and lqfp(). These > generators are very easy to use: they have only a few parameters, those that > are usually specified among the first lines of a package datasheet. They > can't handle special cases, but can safely generate any of the usual > QFN/TFQP footprints. Details: > http://repo.hu/projects/pcb-rnd/devlog/20150820b_qf.html > > The online version of the parametric footprint generator is accessible at > http://igor2.repo.hu/cgi-bin/pcblib-param.cgi > > The source is in svn: svn://repo.hu/pcb-rnd/trunk/pcblib/parametric > > Comments, bugreports, feature requests are welcome. > > Regards, > > Igor2 > > Random thought. A plugin in gEDA that lets you declare a single box with one pin as a hole of X type (M3, 4-40, etc) close or loose fit and then defines for PCB what the dimensions should be with ether a silk screen ring to outline of head diameter or copper under the whole area (via). Right now I have a set of symbols for screws and a set of footprints but it would be cool and relatively simple to autogenerate them. -- Home http://evanfoss.googlepages.com/ Work http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/