Re: gEDA-user: Still compiling 1.5.2
On Thursday 21 May 2009 23:11:57 KURT PETERS wrote: Peter, You would not BELIEVE how ungodly ugly that (display-color-map '((background #ff))) in my gschemrc makes gschem's screen. It's the grid lines that are doing it in, but the text is unreadable. and, frankly, the screen is unreadable. I'm using 1.5.2 now. I did notice that now there's a view light color scheme included as a menu option that looks fine though. Of course, it would be nice if it could save the configuration when you change it. Ah, you didn't say you wanted to change the colour map as a whole. In that case you need (as clearly documented in the first few lines of system- gschemrc): (load (build-path geda-rc-path gschem-colormap-lightbg)) Peter -- Peter Brett Cambridge University Engineering Department signature.asc Description: This is a digitally signed message part. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Outsourcing PCB layout
On 5/21/09, Michael Sokolov msoko...@ivan.harhan.org wrote: I hope this post is not too off-topic/inappropriate for this list. I have an open source hardware design (an SDSL hacking board) that's getting close to entering the layout phase, and I will soon need to hire someone to do the PCB layout. (I have to outsource it because it's a task well outside my skills range.) Right now I'm just looking for a very rough guess order-of-magnitude estimate of how much this is going to cost me [snip] Additional documentation: http://ifctfvax.Harhan.ORG/OpenSDSL/OSDCU/OSDCU_schem.pdf Interesting project. I'd do it for something like 3000 Russian money units. Regards, Ineiev ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Outsourcing PCB layout
On Fri, 22 May 2009 10:39:56 +0400, Ineiev wrote: Interesting project. I'd do it for something like 3000 Russian money units. Is this rubels? At the current exchange rate it would amount to about 70 EUR or 100 USD. This would barely be enough to buy me food for four days at the local grocery. ---(kaimartin)--- ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Outsourcing PCB layout
On 5/22/09, Kai-Martin Knaak k...@familieknaak.de wrote: On Fri, 22 May 2009 10:39:56 +0400, Ineiev wrote: Interesting project. I'd do it for something like 3000 Russian money units. Is this rubels? Yes. At the current exchange rate it would amount to about 70 EUR or 100 USD. This would barely be enough to buy me food for four days at the local grocery. I'm used to eat less (or it costs less here); but I didn't say I'd be happy to layout any board for that price. I said for this particular project (and for this time). Regards, Ineiev ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Still compiling 1.5.2
Peter, Yes, in a previous post I discussed the numerous ways of changing the background/scheme, including providing a link to an instructional web site. Being naturally curious, I like to try a few alternatives to see what they do; thus trying yours, since that seemed perhaps the simplest. But, we all learned something from my experiment, didn't we? Kurt Date: Fri, 22 May 2009 07:03:42 +0100 From: Peter TB Brett pe...@peter-b.co.uk Subject: Re: gEDA-user: Still compiling 1.5.2 To: gEDA user mailing list geda-user@moria.seul.org Message-ID: 200905220703.42586.pe...@peter-b.co.uk Content-Type: text/plain; charset=iso-8859-15 On Thursday 21 May 2009 23:11:57 KURT PETERS wrote: Peter, You would not BELIEVE how ungodly ugly that (display-color-map '((background #ff))) in my gschemrc makes gschem's screen. It's the grid lines that are doing it in, but the text is unreadable. and, frankly, the screen is unreadable. I'm using 1.5.2 now. I did notice that now there's a view light color scheme included as a menu option that looks fine though. Of course, it would be nice if it could save the configuration when you change it. Ah, you didn't say you wanted to change the colour map as a whole. In that case you need (as clearly documented in the first few lines of system- gschemrc): (load (build-path geda-rc-path gschem-colormap-lightbg)) Peter -- Peter Brett Cambridge University Engineering Department ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: geda-bundle trouble
Also, what does fink list geda return? ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Outsourcing PCB layout
Michael Sokolov wrote: Joerg joerg...@analogconsultants.com wrote: It sure does sound reasonable. Probably what my layouter would have quoted me also (and no, he won't be an option here because he doesn't use gEDA). Well, I don't use gEDA either, I use uEDA for the schematic/BOM phase of the design, but that doesn't really matter, I just export PostScript/PDF schematics, a netlist and various BOM formats. Your layouter *would* actually be an option for me, but only if he charges significantly less than what others on this list have already offered, which I indeed find rather unlikely. If two layout contractors charge approximately the same rate, but one uses PCB and the other uses something proprietary, I would choose the one who uses PCB because: * Making uEDA export the netlist in other formats would be extra work for me; * I already have all the footprints for my board in the PCB format, but if the layout contractor uses something else, he would have to redraw those footprints and charge me for that extra time; * Having the layout done in PCB would make it easier for me to own the final product. (I'm not talking about the legal ownership crap which is implied if I hire someone to do a layout for me, I'm talking about being able to do whatever I like with it afterward in the technical sense.) MS Another thing to consider is the brand new topo autorouter. Tony is making changes to it as of the other day... With the wide spacing of parts allowed, putting power and ground planes, locating parts, and turning on the autorouter this might be a speed project in two days! (w/o any engineering of course) I hadn't the time yet to look over the detailed design, but the others saying four to five full working days is OK by me too. but then, the international reach of the internet along with closed borders and regulated trade may put me out, way out :-) On Fri, 22 May 2009 10:39:56 +0400, Ineiev wrote: Interesting project. I'd do it for something like 3000 Russian money units. Is this rubels? At the current exchange rate it would amount to about 70 EUR or 100 USD. This would barely be enough to buy me food for four days at the local grocery. I was wondering if this fit with anything I am doing? Michael, does this SDSL link have any better deterministic time you can phase lock to? My sensornets want precision time at the edge of their radio connected fields -- for IEEE-1588 precision time protocol time stamping. John Griessen -- 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: [OFF] high current amplifier
John Doty wrote: And finally, the real issue here is the current required. 100 amps will melt the wire in any audio transformer I've ever seen. Everybody seems to think Mark's soldering gun suggestion is a joke, but I don't know. I think I'd get one, pull the transformer, measure its characteristics, see if it might work (maybe a couple of them in series/parallel or something). They're light, cheap, and the closest thing to the requirement here I can think of. I'm sure they won't run at full power all day without overheating, but for a test set that might be OK. The classic 10kW spot welder by Miller is now cloned and available at Harbor Freight cheap. It's a similar, beefier transformer as a quick hot or weller solder gun. 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: geda-bundle trouble
Charles, I tried to install from source using FinkCommander. fink list geda says peter-gregsons-macbook:TestProject gregson$ fink list geda Information about 8919 packages read in 1 seconds. i geda-bundle 1:1.4.0-14 Bundle of electronic design automation tools i geda-doc 1:1.4.3-11 GNU EDA -- documentation i geda-examples1:1.4.2-10 GNU EDA -- example projects i geda-gattrib 1:1.4.3-12 GNU EDA -- attribute editor i geda-gnetlist1:1.4.3-11 GNU EDA -- netlister p geda-gsch2pcb [virtual package] i geda-gschem 1:1.4.3-12 GNU EDA -- schematic capture i geda-gsymcheck 1:1.4.3-11 GNU EDA -- symbol checker i geda-symbols 1:1.4.3-11 GNU EDA -- symbol files i geda-utils 1:1.4.3-11 GNU EDA -- miscellaneous conversion utili... libgdgeda2.0.15-7 GNU EDA image creation routines libgdgeda6-shli 2.0.15-7 GNU EDA image creation routines (shared l... i libgeda 1:1.4.3-12 GNU EDA -- Electronics design -- dev. files p libgeda-data [virtual package] i libgeda33-data 1:1.4.3-12 GNU EDA -- Electronics design -- data files i libgeda33-shlib 1:1.4.3-12 GNU EDA -- Electronics design -- library ... peter-gregsons-macbook:TestProject gregson$ but I get the same symptoms. When I run gschem, the gschem log window says: Did not find required system-gafrc file [/sw/etc/gEDA/system-gafrc] Did not find optional ~/.gEDA/gafrc file [/Users/gregson/.gEDA/gafrc] Did not find optional local gafrc file [/Users/gregson/Projects/ TestProject/gafrc] Evaluation failed: Unbound variable: build-path Enable debugging for more detailed information Read system-gschemrc file [/sw/etc/gEDA/system-gschemrc] Did not find optional ~/.gEDA/gschemrc file [/Users/gregson/.gEDA/ gschemrc] Read local gschemrc file [/Users/gregson/Projects/TestProject/gschemrc] Could not find [/Users/gregson/Projects/TestProject/(null)] for interpretation Failed to read init scm file [(null)/gschem.scm] Could not find image at file: ../lib/bitmaps/gschem-comp.xpm. Could not find image at file: ../lib/bitmaps/gschem-net.xpm. Could not find image at file: ../lib/bitmaps/gschem-bus.xpm. I note that it did read system-gschemrc, which it found in [/sw/etc/ gEDA/system-gschemrc]. However it cannot find system-gafrc. Regards, Peter Peter Gregson, Ph.D, P.Eng. Professor, ECE Professor, Biomedical Engineering Dalhousie University (902) 499-3931 On 22-May-09, at 10:26 AM, Charles Lepple wrote: Also, what does fink list geda return? ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: suppress log file for gschem
On Fri, May 22, 2009 at 12:53 AM, Peter TB Brett pe...@peter-b.co.uk wrote: On Thursday 21 May 2009 23:06:14 Mark Rages wrote: On Thu, May 21, 2009 at 4:31 PM, Peter TB Brett pe...@peter-b.co.uk wrote: On Thursday 21 May 2009 20:57:04 Mark Rages wrote: It's a huge task to recompile all of gEDA for this bugfix. Is there a way I can just switch off logging entirely? If someone else can verify that your proposed change is valid, then we can put a patch in git. Peter In the meanwhile, I found a work-around: create a file called gschem.log and chmod it 000. Then the open() call fails and gschem can open. Which version are you running? Peter The one in ubuntu universe: 1.4.3.20081231 Regards, Mark markra...@gmail -- Mark Rages, Engineer Midwest Telecine LLC markra...@midwesttelecine.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
John Doty wrote: On May 21, 2009, at 6:00 PM, Joerg wrote: Chris Albertson wrote: [...] I'm thinking about tube amps that had an output impedance of about 1M ohm that used transformers to drive 8 ohm speakers. About a 100,000 to 1 ratio. 1M? What kind of tube was that? Well, that's a typical plate resistance for a small signal pentode, but Power pentodes have lower plate resistance. Small signal, yes. But a 12AX7 won't be enough for a rock concert ;-) For a large signal amplifier, the load generally isn't matched to the output resistance. Instead, it's roughly (peak output voltage)/(peak output current), which is different. If you match the output resistance, in most cases you'll clip at an output power well below the capacity of the amplifier. And finally, the real issue here is the current required. 100 amps will melt the wire in any audio transformer I've ever seen. Everybody seems to think Mark's soldering gun suggestion is a joke, but I don't know. I think I'd get one, pull the transformer, measure its characteristics, see if it might work (maybe a couple of them in series/parallel or something). They're light, cheap, and the closest thing to the requirement here I can think of. I'm sure they won't run at full power all day without overheating, but for a test set that might be OK. It's not a joke, quite viable maybe. But the solder guns I have used can't quite get to 100 amps. Maybe the 100W Weller I got for a client does, it cost around $30 at a hardware store. Another option is to use a regular (fat) mains transformer that has a bit of clearance between the packet and core. Run a wide sheet of thick copper through there, only one turn and leave its usual secondary winding alone. Or if to be driven from a generator drive that other secondary and leave the primary alone (and don't touch it ...). This results in a huge current capability. Another option may be welding transformers. Even my cheap one can deliver 160 amps for quite some time. But those are huge. As usual, Levente needs to take every piece of metal off. Wedding band, wrist watch, etc. Best not to have credit cards close by either because their magnetic strip might later be stripped of its information. BTDT, quite embarrassing when you take the guys out for lunch and the waitress comes back with Your credit card doesn't work. -- Regards, Joerg http://www.analogconsultants.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
On Thu, May 21, 2009 at 5:00 PM, Joerg joerg...@analogconsultants.com wrote: Chris Albertson wrote: [...] I'm thinking about tube amps that had an output impedance of about 1M ohm that used transformers to drive 8 ohm speakers. About a 100,000 to 1 ratio. 1M? What kind of tube was that? I think the highest I had was about 5K. At 5000 volts on the plates ... OK off by just one decimal point. My point still is that tube amps have to deal with a huge impedance mis-match and they handle it with a transformer.Then you ask what transformers can handle a load that is well under 1 ohm. So I thought about arc welders. While on the subject, I'm wanting to build a tube amp. But my goal is not to re-create an old design. Mostly for entertainment and education I want to design and build the transformers too. Anyone have any leads or links to places to buy the parts? I know you can buy frames and the metal plates used to stack a transformer core but where?. I'd start by building something small and easy, like a low power 12V power supply but the goal is to learn the art of high power transformer building -- = Chris Albertson Redondo Beach, California ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
Chris Albertson wrote: On Thu, May 21, 2009 at 5:00 PM, Joerg joerg...@analogconsultants.com wrote: Chris Albertson wrote: [...] I'm thinking about tube amps that had an output impedance of about 1M ohm that used transformers to drive 8 ohm speakers. About a 100,000 to 1 ratio. 1M? What kind of tube was that? I think the highest I had was about 5K. At 5000 volts on the plates ... OK off by just one decimal point. My point still is that tube amps have to deal with a huge impedance mis-match and they handle it with a transformer.Then you ask what transformers can handle a load that is well under 1 ohm. So I thought about arc welders. Point-contact welders may also be an option. While on the subject, I'm wanting to build a tube amp. But my goal is not to re-create an old design. Mostly for entertainment and education I want to design and build the transformers too. Anyone have any leads or links to places to buy the parts? I know you can buy frames and the metal plates used to stack a transformer core but where?. I'd start by building something small and easy, like a low power 12V power supply but the goal is to learn the art of high power transformer building Hammond makes tube-stage transformers, even quite large ones. But those cost a pretty penny and I couldn't bring myself to chop up some of those beauties to stack the cores. Paralleling, yes. You might want to ask in a hardcore audio-freak group. As for tubes I found that HV-driver tubes for color TVs were the best deal. But this was decades ago, today you'd have to take a look at which current production tubes are available and at what cost. Sovtek, Svetlana and so on. The biggest tube amp I ever built was with two of these and you almost had to call the utility before turning it on: http://www.pll.gr/qb5-1750.pdf -- Regards, Joerg http://www.analogconsultants.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Outsourcing PCB layout
John Griessen j...@ecosensory.com wrote: but then, the international reach of the internet along with closed borders and regulated trade may put me out, way out :-) You mean Ineiev's offer being 15-40 times cheaper than what you and everyone else has offered? Yeah, that pretty much guarantees that I'll go with him. :-) Yes, I know the saying that you get what you pay for. But this is a *hobby* project on which I don't expect to make any money ever. I have mentioned the possibility of one ISP wanting me to make 100 of those units, but after I had made that post I have rechecked the availability of all the parts on my BOM and confirmed what I had feared: the RS8973 SDSL transceiver chip, the one that the whole design revolves around, is no longer available by any means other than buying other old SDSL routers on eBay and desoldering that chip. I have 10 such sacrificial routers in my stash which have been acquired for that specific purpose. There is one other chip in my design which I would like to keep in there for sentimental reasons (TI SN75LBC784 EIA-423 transceiver), and it has also apparently become unobtainium. I have 25 of those on hand. Ineiev's price is something I can actually pay out of my own personal hobby budget and it won't bother me that I'll be spending the money on the design of a board of which I'll never be able to make more than 10 or so due to part unavailability. But in order to pay the kind of layout labor prices everyone else is asking (which I have to admit are very reasonable), my project would need to get some outside sponsorship. Under different circumstances this might not have been a problem, but who in the world would sponsor the NRE for a project that can't be built in any volume beyond a few units due to part unavailability? I was wondering if this fit with anything I am doing? Michael, does this SDSL link have any better deterministic time you can phase lock to? I need to understand the question a little better. I can give you my phone # off-list. MS ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
Gene Heskett wrote: On Thursday 21 May 2009, Joerg wrote: [...] Wow, I've never been in a close call like that one. Only once in a small Dornier aircraft when the (otherwise totally quiet) bush pilot kind of guy let off a lot of cuss words, the stall horn was blaring, pine tree tops came at us and it was of course not high enough to do a parachute bail. A burly mtorcycle guy next to me who usually isn't afraid of anything mumbled Well, I guess this is it. We made it but could see the snow flying off the trees as we inched up in altitude. Maybe the newly found ground effect or something saved us. For a while there the tree tops looked like the road does from the low seats of a Porsche. Humm, similar I suppose to a go-kart I once had. Quite a rush when the blacktop is going by your hip joints at 120+mph, an only an inch below them. That of course was back in the 60's when go-kart engines were 2 strokers and some could make 4 to 5 horse per cubic inch. Mine was an old outboard, 14ci, but a deflector head design so even on booze it was only maybe 2hp/ci, and about 1 on straight gas. But that was enough to get the job done for me. :) I highly recommend that everyone who really wants to learn to drive, do it on an old go-kart, the new 4 strokers aren't fast enough by any means. On a go- kart you can play with the envelope and find out what the machine can do, generally without collecting any broken momentos. Lose it in the corner and spin it out? Go do it again, till you can hit that corner 30mph faster than when you spun out, steer it with the throttle while sliding at a 10 degree angle to the direction you are going, using every inch of the track just like the indy cars do. Spend a summer or 3 doing that and I guarantee you will never, ever drive a cage in such a manner that you can't handle whatever the road or weather throws at you. Even at my age, 74, I still have one corner I use as a gauge to see how I'm doing. I'll second that. Did it in Spain but the track owner from whom I also rented the go-kart didn't want me on there anymore after my power-slides blew out the 2nd tire (including some smoke plumes). They must be rather expensive. -- Regards, Joerg http://www.analogconsultants.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
On May 22, 2009, at 10:47 AM, Joerg wrote: As for tubes I found that HV-driver tubes for color TVs were the best deal. But this was decades ago, today you'd have to take a look at which current production tubes are available and at what cost. Sovtek, Svetlana and so on. Still lots of old TV tubes around: repair shops kept large stocks around, and dealers grabbed them for pennies on the dollar as the shops closed up when the tube era ended. If you want to build tube stuff from scratch http://tubesandmore.com/ has lots of stuff: old tubes, current tubes, sockets, transformers, ... In Japan, Tokyu Hands (a division of the Tokyu department store chain) sells tube amplifier kits. 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: [OFF] high current amplifier
John Doty wrote: On May 22, 2009, at 10:47 AM, Joerg wrote: As for tubes I found that HV-driver tubes for color TVs were the best deal. But this was decades ago, today you'd have to take a look at which current production tubes are available and at what cost. Sovtek, Svetlana and so on. Still lots of old TV tubes around: repair shops kept large stocks around, and dealers grabbed them for pennies on the dollar as the shops closed up when the tube era ended. If you want to build tube stuff from scratch http://tubesandmore.com/ has lots of stuff: old tubes, current tubes, sockets, transformers, ... Thanks. There are many tube places and prices (or the mark-ups) seem to vary widely. One shop has a certain tube for cheap, but another is a lot better in price for a different tube. These guys even have Chinese 6146 for 20 bucks: http://www.tubedepot.com/index.html But I haven't shopped there yet and also I prefer the mil version with graphite plates, with some luck those can be had for around $30. Then there is stuff you'd be hard-pressed to do with semiconductors, like HV-switching. The GP-5 triode can avoid the white-knuckle ride of a FET-stack and I've seen it for $5 at a few places: http://tubes-store.com/product_info.php?products_id=58 In Japan, Tokyu Hands (a division of the Tokyu department store chain) sells tube amplifier kits. The dream of any electronics engineer, one whole day for an extended stroll through Akihabara, and no budget limits :-) -- Regards, Joerg http://www.analogconsultants.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
On May 22, 2009, at 12:35 PM, Joerg wrote: In Japan, Tokyu Hands (a division of the Tokyu department store chain) sells tube amplifier kits. The dream of any electronics engineer, one whole day for an extended stroll through Akihabara, Hai, shimashita. Been there, done that. But I don't recall a Tokyu Hands there. Plenty of them around, though. I'm often in Machida in December, and there's a Tokyu Hands right by the train station. Good place for Christmas shopping. It's arts, crafts, tools, and housewares, not primarily electronics. and no budget limits :-) Sadly, no. 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
gEDA-user: ??Error message PCB??
Hello, I have a problem while converting my schematic too pcb. I have made a schematic with gschem and converted it with gsch2pcb . When I start up my new created pcb file I got the following error message from the program PCB: Looking for default_font in . Can't open ./default_font for reading Looking for default_font in /usr/bin/../share/pcb Found default_font in /usr/bin/../share/pcb ERROR parsing file 'DigitalPowerSupply.pcb' line:117 description: 'syntax error' The gtk gui currently ignores grey50as part of a menuitem resource. Feel free to provide patches ghid_load_menus(): Mouse resources are currently ignored by the GTK HID. Please feel free to submit a patch to implement this! -- This is on line 117= ).fp(1210.fp,M1/L4,4.7uH/0.9A/0.2R) Below is a snap of the file. # This draws a 1 mil placement courtyard outline in silk. It should probably # not be included since you wont want to try and fab a 1 mil silk line. Then # again, it is most useful during parts placement. It really is time for some # additional non-fab layers... # ElementLine[eval(-1*V1/2) eval(-1*V2/2) eval(-1*V1/2) eval( V2/2) CYW] # ElementLine[eval(-1*V1/2) eval(-1*V2/2) eval( V1/2) eval(-1*V2/2) CYW] # ElementLine[eval( V1/2) eval( V2/2) eval( V1/2) eval(-1*V2/2) CYW] # ElementLine[eval( V1/2) eval( V2/2) eval(-1*V1/2) eval( V2/2) CYW] ).fp(1210.fp,M1/L4,4.7uH/0.9A/0.2R) # grab the input values and convert to 1/100 mil --- Can you please tell me what the problem is? ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: ??Error message PCB??
This means you have (or used) a footprint file (*.fp) that has a name that matches an M4 library part. For example, M4 has 1210 so you can't have 1210.fp. You'll need to either rename the part, or disable the M4 libraries. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Outsourcing PCB layout
On Fri, 22 May 2009 16:20:19 +0400, Ineiev wrote: I'm used to eat less (or it costs less here); It'll certainly cost less. Average blue collar worker wage in Germany is about 2800 EUR/month. This does not include the employers share of the pension insurance. So even ten times your bit would still be near the lower end of the spectrum of wages for less qualified jobs... ---(kaimartin)--- ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
On Friday 22 May 2009, Joerg wrote: John Doty wrote: On May 21, 2009, at 6:00 PM, Joerg wrote: Chris Albertson wrote: [...] I'm thinking about tube amps that had an output impedance of about 1M ohm that used transformers to drive 8 ohm speakers. About a 100,000 to 1 ratio. 1M? What kind of tube was that? Well, that's a typical plate resistance for a small signal pentode, but Power pentodes have lower plate resistance. Small signal, yes. But a 12AX7 won't be enough for a rock concert ;-) And its not even a pentode, its a dual triode, designed for phono preamps and such. For a large signal amplifier, the load generally isn't matched to the output resistance. Instead, it's roughly (peak output voltage)/(peak output current), which is different. If you match the output resistance, in most cases you'll clip at an output power well below the capacity of the amplifier. And finally, the real issue here is the current required. 100 amps will melt the wire in any audio transformer I've ever seen. Everybody seems to think Mark's soldering gun suggestion is a joke, but I don't know. I think I'd get one, pull the transformer, measure its characteristics, see if it might work (maybe a couple of them in series/parallel or something). They're light, cheap, and the closest thing to the requirement here I can think of. I'm sure they won't run at full power all day without overheating, but for a test set that might be OK. Full power? A minute thirty maybe then needs at least a 5 minute cooldown. It's not a joke, quite viable maybe. But the solder guns I have used can't quite get to 100 amps. Maybe the 100W Weller I got for a client does, it cost around $30 at a hardware store. Another option is to use a regular (fat) mains transformer that has a bit of clearance between the packet and core. Run a wide sheet of thick copper through there, only one turn and leave its usual secondary winding alone. Or if to be driven from a generator drive that other secondary and leave the primary alone (and don't touch it ...). This results in a huge current capability. Another option may be welding transformers. Even my cheap one can deliver 160 amps for quite some time. But those are huge. As usual, Levente needs to take every piece of metal off. Wedding band, wrist watch, etc. Best not to have credit cards close by either because their magnetic strip might later be stripped of its information. BTDT, quite embarrassing when you take the guys out for lunch and the waitress comes back with Your credit card doesn't work. :-) -- Cheers, Gene There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) The NRA is offering FREE Associate memberships to anyone who wants them. https://www.nrahq.org/nrabonus/accept-membership.asp Life is a whim of several billion cells to be you for a while. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
On Friday 22 May 2009, Joerg wrote: I'll second that. Did it in Spain but the track owner from whom I also rented the go-kart didn't want me on there anymore after my power-slides blew out the 2nd tire (including some smoke plumes). They must be rather expensive. 40 years ago, those slicks were about a $30 bill ea. So today, probably $75, 90 maybe? I haven't kept up. Shame on me. But I never blew one. My only failures were related to spinning the wheel in them, peeling the valve core out of the innertube. -- Cheers, Gene There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) The NRA is offering FREE Associate memberships to anyone who wants them. https://www.nrahq.org/nrabonus/accept-membership.asp Complex system: One with real problems and imaginary profits. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: geda-bundle trouble
Peter Gregson peter.greg...@... writes: Charles, I tried to install from source using FinkCommander. fink list geda says peter-gregsons-macbook:TestProject gregson$ fink list geda [...] i libgeda33-data 1:1.4.3-12 GNU EDA -- Electronics design -- data files i libgeda33-shlib 1:1.4.3-12 GNU EDA -- Electronics design -- library ... peter-gregsons-macbook:TestProject gregson$ but I get the same symptoms. When I run gschem, the gschem log window says: [...] I think one of my messages got swallowed up by gmane. Do you get anything from 'dpkg -L libgeda33-data | grep gafrc' ? If not, well... this is sort of straying away from gEDA territory (since gEDA needs that file to run, and Fink should have installed it). I believe I sent you the fink-user list info the other day - they should be able to help you sort this out. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: [OFF] high current amplifier
I have not made it to Akihabara, but if you are around the Nagoya area you can try Osu it has the same kind of stuff. I always have to plan for a side trip and a little extra spending money. On Fri, May 22, 2009 at 2:49 PM, John Doty [1]...@noqsi.com wrote: On May 22, 2009, at 12:35 PM, Joerg wrote: In Japan, Tokyu Hands (a division of the Tokyu department store chain) sells tube amplifier kits. The dream of any electronics engineer, one whole day for an extended stroll through Akihabara, Hai, shimashita. Been there, done that. But I don't recall a Tokyu Hands there. Plenty of them around, though. I'm often in Machida in December, and there's a Tokyu Hands right by the train station. Good place for Christmas shopping. It's arts, crafts, tools, and housewares, not primarily electronics. and no budget limits :-) Sadly, no. John Doty Noqsi Aerospace, Ltd. [2]http://www.noqsi.com/ [3]...@noqsi.com ___ geda-user mailing list [4]geda-u...@moria.seul.org [5]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user References 1. mailto:j...@noqsi.com 2. http://www.noqsi.com/ 3. mailto:j...@noqsi.com 4. mailto:geda-user@moria.seul.org 5. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
