Re: gEDA-user: gedasymbols.org down
Bob Paddock graceindustr...@gmail.com wrote: On Fri, Feb 26, 2010 at 9:49 AM, Kai-Martin Knaak k...@familieknaak.de wrote: gedasymbols.org seems non responsive at the moment. Any hint for a reason? Blizzard in that area would be my guess. Lots of places without power. Someone set up a mirror in Texas at some point?? How much space would such a mirror need as of now? What other requirements? Any special software? How much load? Just asking, as someone (I myself for example) would be willing to throw in a dime or two, either in money or in real hardware. Greets, Florian ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gedasymbols.org down
John Griessen j...@ecosensory.com wrote: John Griessen wrote: Bob Paddock wrote: On Fri, Feb 26, 2010 at 9:49 AM, Kai-Martin Knaak k...@familieknaak.de wrote: gedasymbols.org seems non responsive at the moment. I added an A record for DNS and the gedasymbols.org mirror in CA responds briskly now from TX where I have nameservers at my virtual host company on my list. Add these if you want ot use gedasymbols.org right away: nameservers are: ns1.quantact.com (76.191.252.151) ns2.quantact.com (64.151.119.219) When DJ's machine comes back I'll need to delete that A record since it's really his domain to serve DNS about. Just as a sidenote: a setup with secondary nameservers might also be appropriate. That way even if the master nameserver goes down the zone will be served by the secondaries (for a limited amount of time IIRC). Doesn't help though when all A records point to offline servers... Just my 2 cents, Florian ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Google Summer of Code 2010
So are any gEDA projects/people going to try and participate in GSoC 2010? Mentoring organizations applications begin on March 8th and end on March 12th. I've some student friends and one or two of them might be interested in working on gEDA related projects for this years GSoC. Robert ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gEDA/gaf Mac OSX screenshots?
On Feb 27, 2010, at 12:18 PM, Stefan Salewski wrote: On Sat, 2010-02-27 at 11:01 -0500, Charles Lepple wrote: I have an old design I could use, but if anyone else is looking to publicize their design this way, email me a link, and l'll load it up on a Mac and take a few screenshots. You may use this medium size 4 layer board: http://www.ssalewski.de/DAD.html.en Stefan, I get a 404 error on the board download link. - Charles ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gEDA/gaf Mac OSX screenshots?
On Mon, 2010-03-01 at 08:09 -0500, Charles Lepple wrote: You may use this medium size 4 layer board: http://www.ssalewski.de/DAD.html.en Stefan, I get a 404 error on the board download link. - Charles Sorry -- fixed. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Need help repairing a damaged FPGA board (GR-PCI-XC2V)
A relatively new professor here at OSU had one of these FPGA boards: http://www.pender.ch/docs/GR-PCI-XC2V_product_sheet.pdf Unfortunately, some students recently fried part of the power regulation circuit. We don't have the expertise to repair it ourselves, and we don't have the budget to buy something new. This board was being shared by multiple students, one of whom was using it for his masters thesis work. So its loss is rather painful and problematic. I was wondering if anyone could advise us on repairing this. Perhaps there is someone whom we could ask to repair it for us? Trying to get the original manufacturer to repair it would probably cost more than it's worth. The damage was done to at least the C12 and D9 components (lower left in the picture). Any suggestions and help would be most appreciated! -- Timothy Normand Miller http://www.cse.ohio-state.edu/~millerti Open Graphics Project ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Need help repairing a damaged FPGA board (GR-PCI-XC2V)
Easy enough to repair. Get two soldering irons. Using two hands (one for each iron), heat both sides of the component, and lift it off the board. Clean with desolder braid and solder on the new components. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Need help repairing a damaged FPGA board (GR-PCI-XC2V)
On Mon, 1 Mar 2010 17:00:30 -0500, Timothy Normand Miller theo...@gmail.com wrote: Unfortunately, some students recently fried part of the power regulation circuit. How practical repairs will be depends on the exact failure mode. Could you tell us exactly what was done to induce the frying, and what symptoms have been observed? If it's just the power regulator that's dead, it should be a fairly simple affair to fix; if it's taken other components with it on the way down (for example, the FPGA) then it might well be beyond recovery. Peter -- Peter Brett pe...@peter-b.co.uk Remote Sensing Research Group Surrey Space Centre ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Need help repairing a damaged FPGA board (GR-PCI-XC2V)
On 03/01/2010 03:00 PM, Timothy Normand Miller wrote: A relatively new professor here at OSU had one of these FPGA boards: http://www.pender.ch/docs/GR-PCI-XC2V_product_sheet.pdf Unfortunately, some students recently fried part of the power regulation circuit. We don't have the expertise to repair it ourselves, and we don't have the budget to buy something new. This board was being shared by multiple students, one of whom was using it for his masters thesis work. So its loss is rather painful and problematic. I was wondering if anyone could advise us on repairing this. Perhaps there is someone whom we could ask to repair it for us? Trying to get the original manufacturer to repair it would probably cost more than it's worth. The damage was done to at least the C12 and D9 components (lower left in the picture). Any suggestions and help would be most appreciated! That's a fairly old board (Spartan 2), looks like a PCI interface, along with some memory, Ethernet and RS-232. Depending on the exact features you need, you could buy up-to-date development boards from Digilent with an academic discount for less than $150 that would replace it. Take up a collection (with some stern looks in the direction of the folks who fried the old one) and you may be able to come up with the cash. Here's more info: http://www.digilentinc.com/Products/Catalog.cfm?NavPath=2,400Cat=10 Eric ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gEDA user: gnetlist -gdrc buffer overflow and gnetlist -gspice-sdb killed
Hi again! I have the following lines in my gnetlisrc: (debug-options (list 'stack 20)) (eval-options (list 'stack 20)) Also, I tried with a bigger number and editing directly the gnet-drc2.scm but the error still appearing. Reviewing my previous flash converter (3 bits) I saw the same error but with the stack options changed in the gnetlistrc all works fine. Assuming that the drc2 backend will not report anything wrong, I tried to run the spice-sdb backend but finished unexpectedly with 'Killed'. The output and the content of the gnetlist.log: - using spice-sdb: [3][1]http://pastebin.com/MpWjqVq8 - gnetlist.log: [2]http://pastebin.com/qumXeXbu I'm using several files for each component because my thesis work is related to a fail that is injected on MOS transistors and I need to attach a voltage source in one and only one transistor at a time. I made a script that read the netlist file generated by spice-sdb backend and insert the voltage source on each transistor one per one and simulates with ngspice but now I can't make the netlist. Due this I can't have one model file for my parts (as I tried some time ago when I start with the project) because if I insert a fail (voltage source) on a model file all instances of the components using that model file will have the fail at the same time. I'm very confused. I'll keep trying. Thanks! On Sun, Feb 28, 2010 at 1:44 PM, al davis [3]ad...@freeelectron.net wrote: On Sunday 28 February 2010, John Doty wrote: Ah, but it has an open interface we can use. A great strength of gEDA is that the tools play well with other tools, whether they are part of gEDA or not. I don't care how many proprietary tools you can leverage by starting the schematic on gschem. I do care how much of a design you can do with a 100% free/open- source flow, and how well that kind of flow works. I do care about a migration path to encourage people to move from proprietary flows to free/open-source flows. I do care about cooperation between free/open-source tools, whether they are part of gEDA or not. I do care about welcoming those who are making free/open-source tools, adding to how much of a design you can do with a 100% free/open-source flow, whether they are part of gEDA or not. I do care about welcoming researchers, who are creating the new state of the art, the tools of the future. I do care about welcoming hobbyists, who are creating our culture and future. ___ geda-user mailing list [4]geda-u...@moria.seul.org [5]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user -- Facundo J Ferrer References 1. http://pastebin.com/MpWjqVq8 2. http://pastebin.com/qumXeXbu 3. mailto:ad...@freeelectron.net 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
Re: gEDA-user: Need help repairing a damaged FPGA board (GR-PCI-XC2V)
On Mon, 2010-03-01 at 15:19 -0700, Eric Brombaugh wrote: That's a fairly old board (Spartan 2), looks like a PCI interface, along with some memory, Ethernet and RS-232. Depending on the exact features you need, you could buy up-to-date development boards from Digilent with an academic discount for less than $150 that would replace it. Take up a collection (with some stern looks in the direction of the folks who fried the old one) and you may be able to come up with the cash. Here's more info: http://www.digilentinc.com/Products/Catalog.cfm?NavPath=2,400Cat=10 Eric And a decent manufacturer of such boards in the UK, whom I've dealt with before is: http://www.enterpoint.co.uk/ They do everything from simple (like I use), up to very silly: http://www.enterpoint.co.uk/merrick/supercomputers.html Perhaps something like: http://www.enterpoint.co.uk/moelbryn/raggedstone1.html They do educational pricing too - just ask if you can't find it for a particular product - it might still be available. Best wishes, -- 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!) ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gEDA user: gnetlist -gdrc buffer overflow and gnetlist -gspice-sdb killed
On Mon, 2010-03-01 at 19:54 -0300, Facundo Ferrer wrote: Hi again! I have the following lines in my gnetlisrc: (debug-options (list 'stack 20)) (eval-options (list 'stack 20)) This is a lame thing for me to suggest, since I don't _know_ of any bug which has been fixed which might be relevant - but you're using a quite old version of gEDA / gnetlist. Could you try again with gEDA 1.6.1 ? At the very least, you might find netlisting is a little quicker, due to some fixes by Peter Brett. Let us know if you need a hand getting a later version of gEDA installed on your distro? (Let us know what distro that is, and how you got gEDA installed in the first place). -- 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!) ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Need help repairing a damaged FPGA board (GR-PCI-XC2V)
On Mon, 2010-03-01 at 17:00 -0500, Timothy Normand Miller wrote: Any suggestions and help would be most appreciated! Just as a reference.. I presume you have the user manual for the board. It mentions the power supply stages, and shows a diagram.. 5V in - 3.3V - 1.5V core voltage, via 2 LDO regulators (the LM1085 chips on the board). Looking up their pin-outs, noting pin 1 is the one with the dot next to it.. you should have: 1: Adj/Ground (Might connect to GND, might be a divided version of the output. 2: Output (also connected to the metal tab at the back) 3: Input. One regulator ought to show 5V in, 3.3V out, the other should be 3.3V in, 5V out. Certainly change out the damaged components first. The tantalum capacitor might have blown due to over-volts - or reverse polarity. (Was that what happned?) The diode might be the suggested reverse input - output connection diode for the regulator - OR, be a reversed protection diode to short the input in case it is the wrong polarity - OR, a series pass diode for the input. (Or none of the above). I would suggest initial power-up via a current limited lab PSU. Don't set it too low though, or the board won't boot. I's suggest trying at 0.5A to start with, giving it up to 1A as it wants.. That ought to help prevent further collateral damage if the regulators are blown. Having just thought of this.. ramp up the voltage slowly.. these are LDO regulators, not switchers - so you ought to be able to persuade them to come up slowly. At 2 or 3V input, the 1.5V output might just start to regulate, make sure it doesn't exceed 1.5V. Similarly - watch the 3.3V output, and make sure it doesn't rise above 3.35, 3.4 (say), as you power up. In any case - if there was damage to be done, it has probably already been done - so you're unlikely to screw things up further. You might even try powering up without the diode - perhaps even without the capacitor - or solder a similar value capacitor in its place for testing. Best wishes, -- 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!) ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gEDA user: gnetlist -gdrc buffer overflow and gnetlist -gspice-sdb killed
Hi, I have an Ubuntu distro: facu...@uni-laptop:~$ uname -a Linux uni-laptop 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 02:39:34 UTC 2010 x86_64 GNU/Linux I have installed gEDA from the Ubuntu repos. The version is quite old: gEDA/gschem version 1.4.3.20081231 Today I downloaded the sources of version [1]1.6.0-20091004 from [2]http://www.gpleda.org/sources.html, compiled and run all again. The output was quite differente in drc2 check. Now the gnetlist finish with 'Killed' instead of 'Buffer overflow' but anyway does not create the netlist (the same output for drc2 and spice-sdb backends). After that I realize that there is a 1.6.1 version (I didn't found before I think there are bad links into the web) I repeat the same steps but the problem persists. A detail that previously I didn't mention is that some times (all versions tested 1.4.3 1.6.0 1.6.1) after I ran gnetlist -gspice-sdb ... and crash with Killed my windows manager crash too and I have to reload it. Thanks! On Mon, Mar 1, 2010 at 8:41 PM, Peter Clifton [3]pc...@cam.ac.uk wrote: On Mon, 2010-03-01 at 19:54 -0300, Facundo Ferrer wrote: Hi again! I have the following lines in my gnetlisrc: (debug-options (list 'stack 20)) (eval-options (list 'stack 20)) This is a lame thing for me to suggest, since I don't _know_ of any bug which has been fixed which might be relevant - but you're using a quite old version of gEDA / gnetlist. Could you try again with gEDA 1.6.1 ? At the very least, you might find netlisting is a little quicker, due to some fixes by Peter Brett. Let us know if you need a hand getting a later version of gEDA installed on your distro? (Let us know what distro that is, and how you got gEDA installed in the first place). -- 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!) ___ geda-user mailing list [4]geda-u...@moria.seul.org [5]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user -- Facundo J Ferrer References 1. http://geda.seul.org/release/v1.6/1.6.0/ 2. http://www.gpleda.org/sources.html 3. mailto:pc...@cam.ac.uk 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
Re: gEDA-user: TO-92 Best Practices
Donald Tillman wrote: Hey folks, What's considered Best Practices for TO-92 packages? I'm working on a project that involves a lot of discrete transistors in TO-92 packages -- the regular style, 3 in-line, no fancy triangular pinouts or lead forming or anything. The TO92 package in pcblib-newlib seems to be larger than necessary, in pin spacing, pad size, and hole size. Pin spacing: The actual package has the pins 50 mils apart. Is this used in practice? Or is it too problematic, and maybe it's more practical to just spread the leads a little by hand? Are there machine insertion issues? (Not that I care right now, but I'd like to be as uptown about it as possible.) The TO-92 leads are 20 mils diameter. Would a 24 mil hole be fine then? And maybe a 35 mil pad? Anybody have success (or failure) stories or advice? -- Don Well, I had a disaster once where I used a footprint with the triangular hole pattern, but my transistors all had straight leads, like yours. We just spread the leads a little by hand and then pushed the transistors in. As they went in, the holes acted like lathe tools and machined curly chips off the leads that then shorted about 10 percent of the transistors. So the next time I ordered transistors that had the leads already bent out into the triangular pattern. Maybe there's a tool that will bend them properly so that you can use your existing stock. Paul Probert University of Wisconsin ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
On Sat, Feb 27, 2010 at 5:27 PM, Donald Tillman d...@till.com wrote: Hey folks, What's considered Best Practices for TO-92 packages? Redesign with SOT-23. Easier to solder, faster than stuffing TO-92. 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: TO-92 Best Practices
What's considered Best Practices for TO-92 packages? Redesign with SOT-23. Easier to solder, faster than stuffing TO-92. +1 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
On Mar 1, 2010, at 7:15 PM, Geoff Swan wrote: What's considered Best Practices for TO-92 packages? Redesign with SOT-23. Easier to solder, faster than stuffing TO-92. +1 Yeah, you guys are helpful. Next up: Q: How do I stop my dog from barking? A: Get a goldfish. :P ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
Why woudl someone use to92 in 2010. On Tue, Mar 2, 2010 at 12:18 PM, Windell H. Oskay wind...@oskay.net wrote: On Mar 1, 2010, at 7:15 PM, Geoff Swan wrote: What's considered Best Practices for TO-92 packages? Redesign with SOT-23. Easier to solder, faster than stuffing TO-92. +1 Yeah, you guys are helpful. Next up: Q: How do I stop my dog from barking? A: Get a goldfish. :P ___ 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: gEDA user: gnetlist -gdrc buffer overflow and gnetlist -gspice-sdb killed
On 01/03/2010, Facundo Ferrer facundo.j.fer...@gmail.com wrote: [...] The output was quite differente in drc2 check. Now the gnetlist finish with 'Killed' instead of 'Buffer overflow' but anyway does not create the netlist (the same output for drc2 and spice-sdb backends). After that I realize that there is a 1.6.1 version (I didn't found before I think there are bad links into the web) I repeat the same steps but the problem persists. A detail that previously I didn't mention is that some times (all versions tested 1.4.3 1.6.0 1.6.1) after I ran gnetlist -gspice-sdb ... and crash with Killed my windows manager crash too and I have to reload it. That sounds a lot like the OOM killer jumped in. What do you see if you run dmesg after having gnetlist crash? kind regards. -- Adrian. http://elesquinazotango.com.ar ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gEDA user: gnetlist -gdrc buffer overflow and gnetlist -gspice-sdb killed
Please kindly use computers from this century. On Tue, Mar 2, 2010 at 11:14 AM, Facundo Ferrer facundo.j.fer...@gmail.com wrote: Hi, I have an Ubuntu distro: facu...@uni-laptop:~$ uname -a Linux uni-laptop 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 02:39:34 UTC 2010 x86_64 GNU/Linux I have installed gEDA from the Ubuntu repos. The version is quite old: gEDA/gschem version 1.4.3.20081231 Today I downloaded the sources of version [1]1.6.0-20091004 from [2]http://www.gpleda.org/sources.html, compiled and run all again. The output was quite differente in drc2 check. Now the gnetlist finish with 'Killed' instead of 'Buffer overflow' but anyway does not create the netlist (the same output for drc2 and spice-sdb backends). After that I realize that there is a 1.6.1 version (I didn't found before I think there are bad links into the web) I repeat the same steps but the problem persists. A detail that previously I didn't mention is that some times (all versions tested 1.4.3 1.6.0 1.6.1) after I ran gnetlist -gspice-sdb ... and crash with Killed my windows manager crash too and I have to reload it. Thanks! On Mon, Mar 1, 2010 at 8:41 PM, Peter Clifton [3]pc...@cam.ac.uk wrote: On Mon, 2010-03-01 at 19:54 -0300, Facundo Ferrer wrote: Hi again! I have the following lines in my gnetlisrc: (debug-options (list 'stack 20)) (eval-options (list 'stack 20)) This is a lame thing for me to suggest, since I don't _know_ of any bug which has been fixed which might be relevant - but you're using a quite old version of gEDA / gnetlist. Could you try again with gEDA 1.6.1 ? At the very least, you might find netlisting is a little quicker, due to some fixes by Peter Brett. Let us know if you need a hand getting a later version of gEDA installed on your distro? (Let us know what distro that is, and how you got gEDA installed in the first place). -- 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!) ___ geda-user mailing list [4]geda-u...@moria.seul.org [5]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user -- Facundo J Ferrer References 1. http://geda.seul.org/release/v1.6/1.6.0/ 2. http://www.gpleda.org/sources.html 3. mailto:pc...@cam.ac.uk 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 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
On Mar 1, 2010, at 7:19 PM, timecop wrote: Why woudl someone use to92 in 2010. Up to now, it's been because I design soldering kits for beginners. But from now on, I'll do it just to piss you off. Why does Don use them? I don't know. Perhaps he has a low-noise JFET that doesn't come in SOT-23. Or perhaps he's just checking to see whether the folks on this mailing list are helpful or are just a bunch of elitist assholes that give gEDA the wide install base that it has today. Don-- I have a couple of footprints that work well, if you'd like them. They've been tested by thousands of people. -Windell ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
On Mar 1, 2010, at 10:19 PM, timecop wrote: Why woudl someone use to92 in 2010. What does the year have to do with it?? -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: TO-92 Best Practices
Up to now, it's been because I design soldering kits for beginners. But from now on, I'll do it just to piss you off. :-) I hate it when you ask for help with one thing, and people suggest you do something else. Folks, when someone asks how to deal with TO-92, don't suggest they use something else. Either help them with their problem, or refrain from commenting on their choices. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
On Tue, 2 Mar 2010 12:19:22 +0900 timecop time...@gmail.com wrote: Why woudl someone use to92 in 2010. One could ask why I use TO-18's in this day and age, and I'd answer because I can. Really though, most of my projects are retro in nature, so TO-18 just fits that look. -- There are some things in life worth obsessing over. Most things aren't, and when you learn that, life improves. http://starbase.globalpc.net/~ezekowitz Vanessa Ezekowitz vanessaezekow...@gmail.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
Ignoring the response(s) from timecop, I don't believe the suggestion to try sot-23 was intended to be either elitist or unhelpful. *if* the option to use a different footprint is available then in many cases there is a great deal of advantage to using the sot-23 layout. If the work is being done by someone familiar with the pointy end of a soldering iron then it is as Mark points out potentially faster and easier to populate. I concede that in Windell's scenario that through hole components are much better for beginners rendering the suggestion moot, likewise if the part is not available or usable due to some other constraint. I hate it when you ask for help with one thing, and people suggest you do something else. Without a lot of background information as to why a job *has* to be done a particular way there is sometimes value in trying a different approach. Although because it doesn't answer the original question the suggestion is not always helpful... oh well... ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Need help repairing a damaged FPGA board (GR-PCI-XC2V)
Just a bit OT but: since you refered to students, you might like to check wether the following evaluation kit is suitable for your needs: AVNETs Xilinx® Spartan®-3A Evaluation Kit http://tinyurl.com/avnet-dev-kit Features beside the typical FPGA stuff: somehow open (datasheets, etc. given) an existing forum for user discussions an usb interface for programming (sending the bit file is not done via ISE webpack but with a own software tool) ISE Webpack free edition on CD embedded PSoC chip with CapSens-Button and the necessary programmer (miniprog) for the PSoC. Rather much free I/Os compared to other eval-kits power-over-usb (makes it more difficulte for fry it ;) ) and finally the price the drawbacks as I found them I/O-banks are fixed already to 3.3V logic. less I/Os then a real-developer kit ISE Webpack is not open source ;) However, it cost only 49 dollars. Thus instead of buying (or fix) ONE expensive regular development kit you could propably buy a set of those and hand one to each student. Makes it a bit more redundant. Hope that helps a bit Torsten On 03/02/2010 07:00 AM, Timothy Normand Miller wrote: A relatively new professor here at OSU had one of these FPGA boards: http://www.pender.ch/docs/GR-PCI-XC2V_product_sheet.pdf Unfortunately, some students recently fried part of the power regulation circuit. We don't have the expertise to repair it ourselves, and we don't have the budget to buy something new. This board was being shared by multiple students, one of whom was using it for his masters thesis work. So its loss is rather painful and problematic. I was wondering if anyone could advise us on repairing this. Perhaps there is someone whom we could ask to repair it for us? Trying to get the original manufacturer to repair it would probably cost more than it's worth. The damage was done to at least the C12 and D9 components (lower left in the picture). Any suggestions and help would be most appreciated! ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
On Feb 27, 2010, at 3:57 PM, John Luciani wrote: I use two different footprints. Both footprints have the pins inline. One footprint spaces the leads 1.39mm the other 2.60mm. The 2.60mm is the common formed lead pattern. I believe I used the spec from On-Semi. I use a finished hole size of 29mils. The fab tolerance is +-4mils. Hey John, Thanks for that. Researching this a little more... Fairchild's TO-92 spec says that the leads are rectangular, 0.46mm by 0.38mm, and the diagonal there works out to 23.5 mils. With a little extra room for tolerance, yeah, a 29 mil hole sounds good. But with 29 mil holes spaced 50 mils apart, that doesn't leave enough room for the pads and the space between. Maybe 7 mils each. So breaking away from the 50 mil grid by just a little bit and moving the outer legs 5 mils beyond allows the DRC to work. -- Don -- Don Tillman Palo Alto, California d...@till.com http://www.till.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
On Mar 1, 2010, at 7:12 PM, Mark Rages wrote: On Sat, Feb 27, 2010 at 5:27 PM, Donald Tillman d...@till.com wrote: Hey folks, What's considered Best Practices for TO-92 packages? Redesign with SOT-23. Easier to solder, faster than stuffing TO-92. Sheeshe... I probably will go to surface mount at some point. But for now I'm kicking it olde school. This particular project uses some analog IC design styles implemented with hand-matched discrete transistors; diff amps, current mirrors and so forth. So I'd need an efficient way to hand-match surface mount transistors. With TO-92's I can just slap them into a rig and collect them into batches. Surface mount? I dunno. Do they even make SOT-23 sockets? -- Don -- Don Tillman Palo Alto, California d...@till.com http://www.till.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: TO-92 Best Practices
Do they even make SOT-23 sockets? For matching, can you just press them onto a pcb carrier? Something that plugs into a breadboard, and gives you three big copper pads to contact? Assuming holding them down with your finger or even just letting gravity do the work, it might be sufficient. http://www.delorie.com/electronics/adapters/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Looking for cheaper alternative do the LT1205CS (Video Mux)
I am looking for a lower cost replacement for the 2:1 mux I am using for video applications. I need a total of 6 muxes (RGB+Sync and L/R audio). Right now I am using 2 of these for the 6 muxes I need. Bandwidth is not a huge concern as I'm not using this for HDTV applications. Would appretiate gEDA's help. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
