Re: gEDA-user: OT: help needed; asymmetric load after rectifier seems to disrupt its working.
Vcc and Vss are still sensitive to load. So if the design requires both Vss and Vee be equal and opposite, then it needs regulation - zener, for example. Your absolutely right, but that's what comes next. It is the regulators how create the difference in load balance. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: OT: help needed; asymmetric load after rectifier seems to disrupt its working.
On 06/24/2011 06:10 AM, myken wrote: I think that has something to do with the fact we used a pulse transformer to try the circuit. Looks like a diode drop to me, not transformer problems. You've got a series chain of reactances. You're gonna get oscillations and lagging, leading voltage division. Lose the filtering before rectifying. Make the impedances low at the source, higher and filtered, at the load. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Draft documentation for Scheme API
Hi folks, I've now written the documentation for the Scheme API so far (in TexInfo, simply because that was the quickest way to get it done and looking nice). I've put an HTML version on the web temporarily here: http://peter-b.co.uk/geda/geda-scheme/ That URL will change soon(ish), and I'll let you know when it does. Please let me know if you see any problems, as I hope to merge this branch in the next week or so. Peter -- Peter Brett pe...@peter-b.co.uk Remote Sensing Research Group Surrey Space Centre pgpPkwg4CP3vY.pgp Description: PGP signature ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Advanced G-code exporter updated.
For those milling PCBs, I've just updated the patchset for the more advanced G-code exporter to match current git: https://bugs.launchpad.net/pcb/+bug/699497/comments/43 For those not yet familiar with it, please find a screenshot of it's GUI attached, which shows the available features pretty well. Markus -- - - - - - - - - - - - - - - - - - - - Dipl. Ing. (FH) Markus Hitter http://www.jump-ing.de/ attachment: G-code Exporter UI.png ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: web version of gschem/pcb
Dan McMahill wrote: that functionality has been there in pcb and gschem for years Obviously, this is one of the hard to discover features. It is not in the GUI and the manual just mention renumber with a one-liner. http://pcb.gpleda.org/pcb-cvs/pcb.html#Renumber-Action There is no hint, how to actually do the back-annotation on the gschem side. Not in the pcb manual and not in the gschem manual, either. In pcb, when you Renumber(), it creates an annotation file (similar to an ECO file for those familiar with pads). pcb_backannotate will then take that renumber and apply to your schematics. I see a few things missing in the current implementation though. Me too. :-) * It can't deal with refdeses that have been mangled in any way. This prevents the application with simple hirarchical designs. * It does not deal with refdeses changed manually by the user. * It always applies to all components. There is no way to not renumber some parts of the layout. ---)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
gEDA-user: gschem add net problem
When I create a schematic, if I try to put more than one symbol on a net, it does not take. For example, if I were to put three resistors vertically, right next to each other, then add a net across all three on top, and another across all three on bottom, gschem indicates by adding a dot, that the middle resistor has been connected to the net. But if I try moving the middle resistor, it does not rubberband like the two outside ones. This happens whenever I try to install a symbol on a net. I can get it to work by moving the part off the line and connecting another net to it manually. But as soon as I try to move it back into position, the connection goes away, and it will not rubberband. Right now I have it working by having components that are supposed to be in a straight line (for appearance purposes) set up or down a bit. It works, but looks really bad. I must be missing something simple. Can anyone tell me what it is? Thanks, Tim ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gschem add net problem
On 6/24/2011 4:06 PM, Tim Holmes wrote: But if I try moving the middle resistor, it does not rubberband like the two outside ones. This happens whenever I try to install a symbol on a net. I can get it to work by moving the part off the line and connecting another net to it manually. But as soon as I try to move it back into position, the connection goes away, and it will not rubberband. Gschem will convert net segments into a single line segment if they are drawn, or moved to, a straight line. If you only drew one line segment to start with, it will be only editable by the handles on its endpoints (it is a line segment). Hope it helps, Phil ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: gschem add net problem
Thank you for your response. So how would I include the center resistor in the net as described in the example below, other than moving the resistors around in a irregular pattern and creating separate nets? I've tried creating separate net segments, but as soon as I add the next segment, the middle part drops out of the net. Somehow I'm missing the trick on how to do this, or missing something very basic. Thanks again, Tim On 06/24/2011 06:48 PM, Phil Taylor wrote: On 6/24/2011 4:06 PM, Tim Holmes wrote: But if I try moving the middle resistor, it does not rubberband like the two outside ones. This happens whenever I try to install a symbol on a net. I can get it to work by moving the part off the line and connecting another net to it manually. But as soon as I try to move it back into position, the connection goes away, and it will not rubberband. Gschem will convert net segments into a single line segment if they are drawn, or moved to, a straight line. If you only drew one line segment to start with, it will be only editable by the handles on its endpoints (it is a line segment). Hope it helps, Phil ___ 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: gschem add net problem
OK, I think I finally see it. In the example below, I would need to place a net from the pin of the middle resistor to the net connecting the outer two resistors. I can't just drop the pin of a part on an existing net. Tim On 06/24/2011 06:48 PM, Phil Taylor wrote: On 6/24/2011 4:06 PM, Tim Holmes wrote: But if I try moving the middle resistor, it does not rubberband like the two outside ones. This happens whenever I try to install a symbol on a net. I can get it to work by moving the part off the line and connecting another net to it manually. But as soon as I try to move it back into position, the connection goes away, and it will not rubberband. Gschem will convert net segments into a single line segment if they are drawn, or moved to, a straight line. If you only drew one line segment to start with, it will be only editable by the handles on its endpoints (it is a line segment). Hope it helps, Phil ___ 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: gschem add net problem
I usually draw net stubs coming off any long net for the visual safety of seeing each one fully drawn. The risks of not doing it this way seem to great. It also makes different sized symbols fit in parallel without issue. So for three parallel symbols sharing one net there would be at least four net line segments graphically. (one stem and three stubs). Compared to the effort one takes to create a full schematic, this small extra bit of drawing matters little. Regards, Phil Signature On Jun 24, 2011, at 7:25 PM, Tim Holmes holmes...@gmail.com wrote: OK, I think I finally see it. In the example below, I would need to place a net from the pin of the middle resistor to the net connecting the outer two resistors. I can't just drop the pin of a part on an existing net. Tim On 06/24/2011 06:48 PM, Phil Taylor wrote: On 6/24/2011 4:06 PM, Tim Holmes wrote: But if I try moving the middle resistor, it does not rubberband like the two outside ones. This happens whenever I try to install a symbol on a net. I can get it to work by moving the part off the line and connecting another net to it manually. But as soon as I try to move it back into position, the connection goes away, and it will not rubberband. Gschem will convert net segments into a single line segment if they are drawn, or moved to, a straight line. If you only drew one line segment to start with, it will be only editable by the handles on its endpoints (it is a line segment). Hope it helps, Phil ___ 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 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
