Re: gEDA-user: wrong pinout lm7912 symbol
Hi Ales, On Tuesday 11 September 2007 21:06, Ales Hvezda wrote: How do you know that this pinout is correct? What other packages does an lm7912 come in other than TO-220? There isn't a footprint= attribute in the original symbol. My concern is breaking existing user schematics. You're right, but changing the pinnumbers without setting the footprint might cause confusion the next time someone stumbles over the pin numbers. You should be fairly safe with the pinouts of the LM79xx and LM78xx since they are older parts and the variety of power dissipation packages is small. There's a TO92 package out there, too. Werner, please feel free to push this fix into the repository. Also, thank you for setting the footprint= and symversion= attributes. The symversion= attribute will alert any existing users that this symbol has changed. Yes, symversion is always a good thing. Regards Werner ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Power IGBT simulation models
On Fri, 2007-09-14 at 20:52 -0400, al davis wrote: On Friday 14 September 2007, Peter Clifton wrote: Does anyone know of any simulation models compatible with either gnucap, ng-spice (or even P-Spice / other if necessary) for Semikron power IGBT modules, such as the SKM 200GB126D (a half bridge with Trench IGBTs, Ic=190A, 1200V breakdown)? Similar models from other manufacturers would be fine, but it doesn't seem like the manufacturers publish such models. Google igbt model pointed me here: http://www.intusoft.com/articles/Igbt.pdf I looked at that briefly before posting, however they were using some commercial software SPICEMOD to actually define the parameters within the sub-circuit model. I shall try and put some numbers in and see how it looks, and will perhaps have to spend some time running simulations to match against the details in the data-sheet. Thanks for the link. Peter ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: wrong pinout lm7912 symbol
On 9/15/07, Werner Hoch [EMAIL PROTECTED] wrote: You should be fairly safe with the pinouts of the LM79xx and LM78xx since they are older parts and the variety of power dissipation packages is small. There's a TO92 package out there, too. Is the TO92 package for LM79xx or for an LM79Lxx? The dropout voltage on the LM79xx series is fairly high. I would be surprised to see it in a TO92 package. (* jcl *) -- 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: PCB snapshot 20070912 -- Small bug in GTK GUI
On Fri, 14 Sep 2007 22:36:05 +0200 Stefan Salewski [EMAIL PROTECTED] wrote: When I have a pcb main-window smaller than the screen size and move the mouse pointer (activated select tool) out of the window, in some cases the inner of the window (footprints, autorouted traces, ...) is moved about 30% of window size. In fact, this moving (jumping around) happens quite a lot, as far as I can see only when not maximized: If you paste a buffer to the screen, and move it around, the window auto-shifts when moving to the border, but only once. Click (to fix the component), then touch the scrollbar and the window jumps back to the position before the autoshift. Though it's hardly a major bug, it does gets on the nerves after a while. John ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: PCB snapshot 20070912 -- Small bug in GTK GUI
On Sat, 15 Sep 2007 10:47:12 -0300
John Coppens [EMAIL PROTECTED] wrote:
In fact, this moving (jumping around) happens quite a lot, as far as I
can see only when not maximized:
Just found another one (also maximized):
If you use the select window to select an area, autopan occurs when
pushing a side of the window. But touching the scrollbar jumps back to
the original location, which doesn't feel right.
Another problem:
Pressing Ctl (no other key), causes scrolling, if the cursor is on the
scrollbar. Is this correct? I use Ctl-Alt {Left arrow/Right arrow} a lot
to change workspaces, and this does cause some confusion. Touching the
scrollbar jumps back to the original position again.
Greetings,
John
___
geda-user mailing list
geda-user@moria.seul.org
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: First PCB
andrewm wrote: I like your minimization of vias. Most of your vias seem to double as headers for test and interconnect. Looks good. Good use of space -- little waste, but not too crammed to be a practical test/eval/modular add-on board. John Griessen PS What's it look like if you run global puller on it? -- Ecosensory tinyOS devel on: ubuntu Linux; tinyOS v2.0.2; telosb ecosens1 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: PCB snapshot 20070912 -- Small bug in GTK GUI
On Fri, Sep 14, 2007 at 10:36:05PM +0200, Stefan Salewski wrote: When I have a pcb main-window smaller than the screen size and move the mouse pointer (activated select tool) out of the window, in some cases the inner of the window (footprints, autorouted traces, ...) is moved about 30% of window size. Didn't the Lesstif HID used to have this same problem, months ago? -- Ben Jackson AD7GD [EMAIL PROTECTED] http://www.ben.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: dialogue boxes drifting each time they are opened (gschem 1.2.0)
Ben Jackson wrote: Duncan Drennan wrote: This can be especially frustrating with attribute dialogues that keep drifting off the bottom of the screen, and have to be dragged back to a useable place. I'm running gschem on cygwin. Anyone else seeing this? Yes, gschem on cygwin as well. I think it's a bug in Cygwin/X multi-window mode, triggered by new code in gschem that restores the dialog positions. Rootless mode appears to work better: 1) Install WindowMaker 2) Close Cygwin/X 3) Type: $ export DISPLAY=:0 $ X :0 -clipboard -rootless ENTER $ wmaker ENTER $ xterm I will try to make a test case and submit a bug report to the Cygwin/X project. Regards, Cesar ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: First PCB
On Sat, Sep 15, 2007 at 12:51:36PM +1000, andrewm wrote: http://www.thehacktory.com/IR-simple-v1p52-top.png If that big square is a thermal pad, it's not going to help much if you don't stitch it to more copper on the other side... Also, I think your attachments to the sides of those long, skinny pads might cause you grief if you don't have a soldermask. I will download new snapshot and see if the bug is gone and if not I will post a bug report. You're talking about how the units flipped on you? -- Ben Jackson AD7GD [EMAIL PROTECTED] http://www.ben.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: First PCB
Ben Jackson wrote: On Sat, Sep 15, 2007 at 12:51:36PM +1000, andrewm wrote: http://www.thehacktory.com/IR-simple-v1p52-top.png If that big square is a thermal pad, it's not going to help much if you don't stitch it to more copper on the other side... So, what is that under chip square of copper connected to two pads? A mini ground plane? Also, I think your attachments to the sides of those long, skinny pads might cause you grief if you don't have a soldermask. He's got those flares to relieve surface tension. If using solder paste I see no trouble. Plus there's nothing in the way of excess solder -- no functional problem, just appearance -- but only if too much solder. John G -- Ecosensory ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Use of hard-coded fonts in gEDA-Wiki?
Hello, after a reconfiguration of Mozilla-Firefox I have noticed that fonts in http://geda.seul.org/wiki/ seems to be hard-coded (fixed font-name?). Many internet pages does this -- their authors think that they know better than the user/reader which fonts are the best choise. Most of these pages are optimized for special web browser and a special screen resolution. Do we need these infantilizing in gEDA wiki? I have not seen this before, because Mozilla-Firefox has a configuration option do not allow webpages to use their own fonts which I have activated most of the time. (gEDA main page http://geda.seul.org/ does not use a hard-coded font and looks fine.) Best regards Stefan Salewski ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: First PCB
John Griessen wrote: I like your minimization of vias. Most of your vias seem to double as headers for test and interconnect. The only way I could work out how to do this easily in PCB was to make a new component that was just 5 pins in a row and add them in the schematic to the traces I knew where going to be the via/test points along the side. That is probably the nice way to do it and makes things more followable. In protel I just used to pop down vias and pads where ever I felt like it and it would let me connect them. http://www.thehacktory.com/IR-simple-schem.png The ones marked as GPIO1..3 are also the AVRs ISP pins so that I can get the infrared based bootloader in the chip when they are first put together. After that re-flashing of the chip does not need a connection. Seeing as it does not add any extra board space or weight I have left them for use as GPIO and also added 4 more pads on the other side to give access to 4 ADC pins in case anyone wants to use them. Looks good. Good use of space -- little waste, but not too crammed to be a practical test/eval/modular add-on board. I was actually cheating a little bit. This board was a redesign of my last board I ever made with protel. http://www.thehacktory.com/Simple-IR-RX-Prototype-V1p4-Bottom.jpg http://www.thehacktory.com/Simple-IR-RX-Prototype-V1p4-Top.jpg Protel for DOS used 1/1000th of an inch as its internal measurements. Made aligning things on 0.45mm pads a bit hard. So the ATMega48 in the photo is my reason for switching to PCB/gEDA. PS What's it look like if you run global puller on it? It took 10 minutes for the auto opitmizer to run and all it did was spread out a few of my manually added teardrops and pulled one track straight from GND to VCC to create a dead short. Ben Jackson wrote: If that big square is a thermal pad, it's not going to help much if you don't stitch it to more copper on the other side... The big square pad under the QFN28_4 is the extra GND pin for the ATMega48. The chip is only going to be pulling 0.5 to 1mA so should not need extra heatsinking. It does however help with noise performance to connect the pad to GND. The drain pad on the SC70-6-EP FET is being used as heat sink. And before I go into prod. I may try get more copper and vias around it for better heat dissipation. Though I am being very conservative with that FET. It is good for 5.5Amp and it is only going to be asked to do 0.5 to 1Amp in normal duty. Also, I think your attachments to the sides of those long, skinny pads might cause you grief if you don't have a soldermask. Yes - will have solder mask and paste stencil. John Griessen wrote: So, what is that under chip square of copper connected to two pads? A mini ground plane? http://www.thehacktory.com/datasheets/gp1us30xp_e.pdf Is the device. A 38KHz infrared receiver. The manufacturer recomends the GND pad underneath to help with noise performance. Coupled with the metal case on the top it forms a cage/box around the whole thing. I agree with the manufacture in this case. The receiver is very very sensitive to noise and you can gain/loose meters of range with out the GND. Careful placement of other noise on the boards and snuffing them can gain/loose you 10 meters range. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: First PCB
On Sun, Sep 16, 2007 at 08:28:41AM +1000, andrewm wrote: That is probably the nice way to do it and makes things more followable. In protel I just used to pop down vias and pads where ever I felt like it and it would let me connect them. You can do that in PCB. There are two things to keep in mind: 1) You'll have to un-mask it by hand (otherwise it will be covered). DJ explained how to do this recently. 2) Auto DRC and vias are a bit of a pain. If you draw a wire to a point, you can then punch a via through it (there's no autodrc in via placement, in fact, a too-close via will cause the other one to vanish!). If you place the via FIRST, the autodrc will keep you off of it (it's not in the net, after all). However, if you mouse over the target via (or any net, actually) while dragging the line and hit 'f' to hilite the via, you will be allowed onto it. -- Ben Jackson AD7GD [EMAIL PROTECTED] http://www.ben.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: netlists, no connects and unnamed nets
On 9/15/07, Carlos Nieves Ónega [EMAIL PROTECTED] wrote: El jue, 13-09-2007 a las 16:36 -0400, John Luciani escribió: [snip] If you fill the screen (or logfile) with false-positves it can make it very difficult to find the few true-positives (especially for newbies). Without detailed and accurate documentation it is very hard to tweak the tool to get useful information from it (especially for newbies that can't find the documentation ;-) Fully agree. Do you (or anyone) have any cases of false positives at hand? My comment was general not specific to gschem. I have not tried the gschem DRC checker. The only schematic DRC check I have found useful is a rule that identifies unconnected pins that aren't marked unconnected. I work on a number of schematics in parallel and get frequent interruptions. Marking pins as unconnected has saved me a few blue wires. (* jcl *) -- 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: pcb-20070912
On Wed, 12 Sep 2007 23:25:20 -0400 Dan McMahill [EMAIL PROTECTED] wrote: I just uploaded a new pcb snapshot to the sourceforge download area. My goal is to make the next one in closer to 3 months from now instead of having a 7 month gap like this last time. Wow... A big one. When I call the command window with ':', it appears without the text entry field (Dropdown and Close buttons are there). When I press the dropdown button, _crash_ - pcb disappears! John ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: pcb-20070912
John Coppens wrote: On Wed, 12 Sep 2007 23:25:20 -0400 Dan McMahill [EMAIL PROTECTED] wrote: I just uploaded a new pcb snapshot to the sourceforge download area. My goal is to make the next one in closer to 3 months from now instead of having a 7 month gap like this last time. Wow... A big one. When I call the command window with ':', it appears without the text entry field (Dropdown and Close buttons are there). When I press the dropdown button, _crash_ - pcb disappears! John wierd. I'm not able to reproduce this. I get the entry and no crash. Which GUI are you using? Lesstif or Gtk? What happens if you go into the preferences-general tab and turn off the separate command window option? Can you get a back trace on the crash? If you have a build lying around, cd pcb-20070912/src ./pcbtest.sh -gdb gdb run do the stuff to make it crash and then gdb bt -Dan ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
