Re: gEDA-user: File Symbol Creation for an LQFP EP
resea...@ottomaneng.com wrote: > Hello, > > I am rolling my own symbols for my components. Namely an analog devices > sharc ADSP-21369 and altera FPGA. The footprint attribute for the chip > is LQFP208 1102. However, the chip has an exposed pad in the bottom. > According to the list > > http://www.geda.seul.org/wiki/geda:scg#footprint_naming_conventions > > There is no LQFPn x EP. How do I proceed? it looks like almost everything you need is in place. If you have a source tree for pcb, go into lib/ and look at geda.inc. Look around line 448 and you'll see the definition of a LQFP with exposed paddle. If you search a handful of lines later, you'll also see a 208 pin QFP that is not exposed paddle. Basically all you do is copy the one line for either of those and adjust the parameters, rebuild the library, and you are done. The 2 lines you probably want to add are: define(`PKG_LQFP208_28', `PKG_LQFP_50(`$1',`$2',`$3',`208',`28',`0')'); define(`PKG_LQFP208_28_EP', `PKG_LQFP_50(`$1',`$2',`$3',`208',`28',`871')'); note that the `871' should be adjusted to be the correct size for the exposed paddle pad on the board. 871 is the size of the package paddle. -Dan ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Multiple copies of single, small board
For 20 identical copies I would just do it manually. It would be about five minutes of work. I place a 50mil space between copies. This enables me to make a single cut (between rows/cols) with a hacksaw blade. I place copper at least 25mils from the edge (typically 50mils). If I need v-scores, fiducials, assembly data I would use a script. (* jcl *) -- You can't create open hardware with closed EDA tools. twitter: [1]http://twitter.com/jluciani blog:[2]http://www.luciani.org References 1. http://twitter.com/jluciani 2. http://www.luciani.org/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Multiple copies of single, small board
If they're all in pcb, tile it in pcb. Open a new layout and File->Load Layout each board, paste it in place, next board... Or look for my pcb2panel and panel2pcb scripts on gedasymbols.org, which lets you treat boards as elements so you can arrange them easily. Yes, make sure "unique refdes" is DISabled. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Multiple copies of single, small board
I have been working with a High School Robotics team, trying to teach them how to design their own circuits using gschem and board layouts using PCB Fab in a Box to etch the boards. But no one practiced before the workshop, so no one got to see their board own board made. To make up for that, I made a nice, tight layout of the 12 blinking LEDs, and I want to make 20 copies of it in one run to send to them to practice soldering, and so that we can all have identical blinking lights at the robotics competitions. However, I could not find a way to get PCB to export the layout in Postscript and have it tile part of the page with multiple copies. So I tried using GIMP and I got so frustrated trying to align the pasted in masks that I gave up on Gimp and tried Open Office Draw. That didn't work either so I went to OO Word Processor. Even there I could find no way to align the 20 copies in 4 rows of 5 each without drawing temporary lines, moving them by hand, and removing the lines. So my first question, does any one know what I was doing wrong in Gimp that I could not get 20 copies of the mask in 4 neat, even rows of 5 spaced, level (for most room between to cut them out) pastes of the solder side mask? The more appropriate question for this forum is: Should we add a three more questions to the Post Script export dialog box. 1) how many copies tiled across do you want, default to 1 2) how many copies tiled down do you want, default to 1 3 what spacing between rows do you want, default to 100 mills, not used if previous value is one I am sure that I am not the only one that want to etch more than one copy of a simple board at once. I assume that if I cut-n-paste within PCB, that it will have to increment the refdes names otherwise the netlist becomes wonky. And it would like to send these out with simple, step-by-step instructions on how to build them, and that won't work of the silkscreen numbers are different on every one. Mike ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: File Symbol Creation for an LQFP EP
Am Wednesday 23 December 2009 14.55:13 schrieb resea...@ottomaneng.com: > Hello, > > I am rolling my own symbols for my components. Namely an analog devices > sharc ADSP-21369 and altera FPGA. The footprint attribute for the chip > is LQFP208 1102. However, the chip has an exposed pad in the bottom. > According to the list > > http://www.geda.seul.org/wiki/geda:scg#footprint_naming_conventions > > There is no LQFPn x EP. How do I proceed? > Probably the fastest way is to use the footgen.py [1]. I use this script for almost all footprints. [1] http://dlharmon.com/geda/footgen.html -- mit freundlichen Grüssen Christian Riggenbach ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: File Symbol Creation for an LQFP EP
> There is no LQFPn x EP. How do I proceed? You make your own footprint, like everyone else does when they encounter a new package style. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: File Symbol Creation for an LQFP EP
Hello, I am rolling my own symbols for my components. Namely an analog devices sharc ADSP-21369 and altera FPGA. The footprint attribute for the chip is LQFP208 1102. However, the chip has an exposed pad in the bottom. According to the list http://www.geda.seul.org/wiki/geda:scg#footprint_naming_conventions There is no LQFPn x EP. How do I proceed? Merci! Omer Osman P.S. page 56 of spec sheet has chip dimensions http://www.analog.com/static/imported-files/data_sheets/ADSP-21367_21368_21369.pdf ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: OT: large (29 inch) boards?
On Dec 23, 2009, at 1:06 AM, Dave N6NZ wrote: > Back in the days when I was a CPU designer, we did backplane boards > much larger than that. I once spec'ed out an impedance controlled > (IOW: very thick) PCB that was 42" x 6". Yes, everybody thought I > was nuts. I probably was/am, but let me tell you with an impedance > controlled PCB, and passive pull-up/pull-down termination at both > ends, the signal edges were text-book clean. I don't remember > what it cost, but that was ages ago so it wouldn't be useful > information today. For that matter, the box it went into sold for > a cool $1M, and only used 6 of these boards, so it didn't matter > then, either :) Ok, I gotta ask...what was this machine? It sounds like something I'd be very much interested in. And maybe something I already have. ;) -Dave > -- Dave McGuire Port Charlotte, FL ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Font sizes messed up in gschem on Mac OS X 10.6
Hello Steve! > Build dependencies with macports, and install gEDA from source works > for me here on 10.6.2. Thanks for your advice, I tried macports too and it works! The only thing that bothers me is that as usual for macports, I have now an /opt folder with about 1.7G of software I mostly don't need. I looked into the dependencies too, but that seems rather puzzling to mee. Somewhere must be an important difference to my "from scratch"-build, but I don't find it at the moment. I'll look into that later. Regards, Christian ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
