Re: gEDA-user: Bourns 3386P footprint
David Griffith wrote: How does it look now? Good :-) Just a minor note: I like to set the square flag on the first pin. This makes debugging in the absence of a silk print easier. -- press q while the mouse hovers over the pin. A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? I like your sig. ---)kaimartin(--- -- Kai-Martin Knaak tel: +49-511-762-2895 Universität Hannover, Inst. für Quantenoptik fax: +49-511-762-2211 Welfengarten 1, 30167 Hannover http://www.iqo.uni-hannover.de GPG key:http://pgp.mit.edu:11371/pks/lookup?search=Knaak+kmkop=get ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Bourns 3386P footprint
On Thu, 12 Aug 2010, Kai-Martin Knaak wrote: David Griffith wrote: How does it look now? Good :-) Thanks. Just a minor note: I like to set the square flag on the first pin. This makes debugging in the absence of a silk print easier. -- press q while the mouse hovers over the pin. Or I could type square in the last parameter of pin 1... A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? I like your sig. Thanks. It can be a firestarter sometimes. -- David Griffith dgri...@cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Commercial CAD, land pattern generators report
Hi all, -Original Message- From: geda-user-boun...@moria.seul.org [mailto:geda-user-boun...@moria.seul.org] On Behalf Of Bob Paddock Sent: Thursday, August 12, 2010 1:07 AM To: gEDA user mailing list Subject: Re: gEDA-user: Commercial CAD, land pattern generators report a 1 part library operating a layout service bureau Take a look at http://wikicomponents.com The worlds first and only truly open source for 2D and 3D PCB component package, part and electrical device data. I did point out to them that http://gedasymbols.org , was around for a while, which not really my point here. I corresponded with Dino Ditta, the person behind the site, when it first opened. There were some ambiguities about the terms of use, as far as being Open Source friendly, and he said that was his intention, and that he would clean up the ambiguities. Don't know if he did that. He was open to having KiCAD and PCB symbols posted there. Maybe we could get behind his 3D effort rather than DXF? Last I looked there were a lot of part numbers, with nothing to back them up, which I did complain about to Dino, don't know if he fixed that. Frustrating to spend time searching the list for it to lead to nothing. -- http://blog.softwaresafety.net/ http://www.designer-iii.com/ http://www.wearablesmartsensors.com/ Excuse me for having a rather pessimistic view about this site. At first sight the story/website sells, I (myself) might even get involved in this idea, at least someone has seen the problem of the EDA user community (this is not the EDA vendor community problem, that one is solved with a 20k++ $ seat of some softwarez). Then I start to look for some oddities and errors, none to be found, it's a near perfect set up. Contributed parts data and the contributors get ranked, OK to me, we should do that on gEDA-symbols site too ;-), let's give some kudos, and warm cuddly hugs to ourselves. Even the Terms of Use are full of legal stuff, now that was to be expected, no surprises here. OK, the German and Chinese translation buttons do not give full translations of everything, just the menu buttons of the webpages get translated into German or Chinese (I think). The mere fact things start with a M$ installer doesn't give an overwhelming Free Open feeling. M$ users are known wanting to pay for everything, either money or valuable time spent on whining for patches/updates (and not scratching their own itch). And how are we addressing the license issue ? I would prefer to contribute with something like GPL, LGPL (it's a library, isn't it) or any other FOSS license. To me the license issue is one of the tell tales of this wikicomponents idea becoming a vendor lock in/out in the future. In the our vision page it is stated (among other things) that Nobody Owns It In the page descibing the Rating System it is stated: quote The most frequently asked question is: Who owns the data? The answer to both of these is the same: The WikiComponents Community. /quote The name is Wikicomponents Inc. that makes it a commercial EDA company with a money trail, where does the money come from and where does it go to ? ... enough said. IMHO, this flipped wikicomponents coin can go just one of two ways: Head: It will work, a bazzillion parts get contributed by thousands of enthousiastic contributors who will produce an error free repo of parts data. And then some day someone will realize that the data contributed is a goldmine and run away with the stuff (gold). Lock in will happen as one of the big EDA companies will buy the data. Lock out will happen as in shutting down the site being the next step. Anyone had made a backup/clone/fork of the data from this site somewhere ? ... Anyone (please) ? ... Nobody (Ok, now that's the person owning the stuff) Tail: Not enough contributors/contributions to gain any/enough leverage against the bazzillion parts out there. I have been there, done that, that is where we are at the moment ;-) I will see how well this goes, things can only get better, for now I scratch my own itch with gEDA and any Automation I can think of for myself. Just my EUR 0.02 Kind regards, Bert Timmerman. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: [OT] Fluorescent tube help
Hi all, Sorry for the OT post, I've googled this to death without finding an answer and was hoping someone here might know. I recently purchased an old, second-hand UV exposure box to try making PCBs at home. One of the tubes has started to fail and in replacing them I have noticed something odd: the box takes two 12 8W T5 tubes, but has only a single 13W switch-start ballast. I assumed that a previous owner uprated the tubes without changing the ballast, but in looking for a replacement I have become stuck. I can find plenty of general information on how fluorescent tubes work, but no specific advice on ballast selection. Also, the way my box is wired (two tubes in series) appears not to be common. Here is what I've found so far: 1. ballast choice is not just about wattage, tube diameter and length seem also to be factors. I don't know why. 2. two tubes can be wired in series here in the UK because of the higher mains voltage, but the suggestion is that a special ballast might be needed. Again, no explanation why. Can anyone give me some definitive answers? Can I just use a single 16W ballast? Can I use a T8 ballast instead of a T5? Thanks, Chris -- Chris Smith cj...@zepler.net ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Commercial CAD, land pattern generators report
Dave N6NZ wrote: On Aug 11, 2010, at 12:28 PM, John Griessen wrote; What's a good reference about DXF? Arghhh... . . .. the structure of dxf... Imagine a design committee consisting entirely of passive-aggressive, 'B' ark chimpanzees that were only convinced to join the project for the meeting donuts. Now imagine the file format they would specify. Now imagine that file format evolved to support things that were never originally intended. That is dxf. . . certain 3D entities are *not* documented, they are binary blobs and you can only get the spec by paying for a license from Autocad and signing an NDA. So no open source dxf library will ever be able to handle all of dxf. My immediate goal is to write a library that can make sense of all 2D information in a complete and coherent way, provide a Pythonic interface for reading and writing dxf, and gracefully ignore or perhaps read-and-blobify anything it doesn't understand without crashing or hanging. Sounds good. Does the blobify function you imagine get the physical max boundaries of the unknown correct? I know someone else working on getting 3D usable by FOSS tools by way of a common open format available as a standard or defacto standard. In electronics it seems defacto standards are better than official ones, so... He's looking at Rhino's OpenNurbs definitions in c++. OpenNurbs.org has the code, public domain. He's considering forking and licensing it GPL. John -- Ecosensory Austin TX ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Commercial CAD, land pattern generators report
Bob Paddock wrote: a 1 part library operating a layout service bureau Take a look at [1]http://wikicomponents.com The worlds first and only truly open source for 2D and 3D PCB component package, part and electrical device data. I corresponded with Dino Ditta, the person behind the site, when it first opened. He was open to having KiCAD and PCB symbols posted there. Maybe we could get behind his 3D effort rather than DXF? After giving it a quick read yesterday, I like Bryan Bishop's SKDB idea better. His concept is a package manager for 3D and BOM data used to make things with FOSS tools. The form of a package is not very rigid -- he wants to use what is out there, but organize it some. If there is a way to get the data ready to feed to a tool, he wants the format to go that far. So for gEDA purposes, since we have no formal project packages, getting a design would likely be getting a project dir to unzip, along with the libraries used and gschemrc and pcb settings needed to modify it. Is there a way to change settings for pcb without using the ~/.pcb dir and only use ./ defined settings? John -- Ecosensory Austin TX ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: land pattern generators vs. verifying footprints
Bert Timmerman wrote: Hi all, a 1 part library operating a layout service bureau Take a look at http://wikicomponents.com The worlds first Excuse me for having a rather pessimistic view about this site. IMHO, this flipped wikicomponents coin can go just one of two ways: Head: It will work, a bazzillion parts get contributed by thousands of enthousiastic contributors who will produce an error free repo of parts data. And then some day someone will realize that the data contributed is a goldmine and run away with the stuff (gold). Tail: Not enough contributors/contributions to gain any/enough leverage against the bazzillion parts out there. Bert, I think the efforts to make an open way to share projects is good, and for footprints and symbols, the LP Wizard approach seems best to copy, where they base everything on actual part shape plus differences from various standards or manufacturer's footprint at the user's choice. They never try to verify manufacturability. They (Mentor Graphics, vendor of LP Wizard) still leave that to a company's SOP if they want to do that. That's the defacto standard -- no feedback publicly. Any footprint shape feedback to get process control is internal to one user and depends on the fab you use anyway. I think contributed parts will always be suspect, and obsolete after a while, and autogenerated has a chance of becoming an open tool. Using the pad shape algorithms to create pads from component shape will let you change the amount of solder overlap consistently on a project, ( that gets made at one fab) and autogenerate a library you could use to send to another fab with little effort. There could be a snag about putting standards publisher's data in the tool, but that could be worked around by having the terms more nominal and less for solder amounts instead of the IPC names most, nominal and least, and having the user do an initial setup to enter the differential amounts coresponding to the IPC or EIA or IEC standards, (which they borrowed or purchased). John ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OT] Fluorescent tube help
Chris Smith wrote: I assumed that a previous owner uprated the tubes without changing the ballast, but in looking for a replacement I have become stuck. I can find plenty of general information on how fluorescent tubes work, but no specific advice on ballast selection. 2. two tubes can be wired in series here in the UK because of the higher mains voltage, but the suggestion is that a special ballast might be needed. If you can get the same bulbs and it's not expensive, run them and maybe they burn out and who cares, as long as you have some good insulation protection from the HV. To get your ballast working I know no good design rules. You could try DJ's UV LED methods and skip the hassle and danger? http://www.delorie.com/pcb/uvled/ Or shop for a second hand UV tanning lamp? Long tubes are a bad shape for exposing photomask anyway. A point source gives better edges. Maybe your old setup was for erasing ROMS? John ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OT] Fluorescent tube help
On Thu, 12 Aug 2010 09:53:43 -0500 John Griessen j...@ecosensory.com wrote: Or shop for a second hand UV tanning lamp? Another solution might be looking at the circuits that excite the tubes with high frequency. With a simple oscillator, you can use the tubes without the filament, and if they still have gas, they'll light up anyway. Plenty of circuits on the 'net. John ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: wishful UI
John, It seems still to be unimplemented in 1.6.1. Or do I simply not understand how it works? I don't use it: the file you saw was notes for documentation, not a bug report. The patch is from my private git repository and is not implemented in any downloadable gnetlist version. I know that you send notes describing the gnetlist commands and not a but report. The guile procedure isn't very useful. At least now it gives a reasonable return value. Bas -- ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: wishful UI
On Aug 12, 2010, at 1:50 PM, Bas Gieltjes wrote: John, It seems still to be unimplemented in 1.6.1. Or do I simply not understand how it works? I don't use it: the file you saw was notes for documentation, not a bug report. The patch is from my private git repository and is not implemented in any downloadable gnetlist version. I know that you send notes describing the gnetlist commands and not a but report. The guile procedure isn't very useful. At least now it gives a reasonable return value. OK, core developers. How do we get this into 1.8? John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ j...@noqsi.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: wishful UI
OK, core developers. How do we get this into 1.8? Upload it to the sourceforge patch tracker to prevent that the patch gets lost. Bas -- ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Commercial CAD, land pattern generators report
On Thu, 2010-08-12 at 09:17 -0500, John Griessen wrote: OpenNurbs.org has the code, public domain. He's considering forking and licensing it GPL. IMO, that sounds like quite an aggressive thing to do to a code base.. particularly forking, then choosing a less permissive license to release under. -- Peter Clifton Electrical Engineering Division, Engineering Department, University of Cambridge, 9, JJ Thomson Avenue, Cambridge CB3 0FA Tel: +44 (0)7729 980173 - (No signal in the lab!) Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me) ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
