gEDA-user: problem to simulate an astable multivibrator with uA741 opamp

I'm trying to simulate an astable multivibrator with ngspice, but the graphic i get is odd. I simulated the same circuit with qucs and ¡ didn't have any problem. I'm trying to figure out where the problem is. This is the netlist: *

Re: gEDA-user: FT232R

My guess is that there is something different about the designs/applications which are experiencing the lockups/malfunctions - too many products use the FTDI USB to UART parts successfully. Among many others are the Arduino Decimila and (Digi) XBEE daughter boards. Peter TB Brett wrote: On

Re: gEDA-user: problem to simulate an astable multivibrator with uA741 opamp

On Apr 15, 2009, at 6:47 AM, joseda wrote: I'm trying to simulate an astable multivibrator with ngspice, but the graphic i get is odd. ... XU1 1 2 Vcc -Vcc 3 uA741 ... The voltage drop below 400V what's the problem?!! You have a node named -Vcc. You haven't attached this node to

Re: gEDA-user: problem to simulate an astable multivibrator with uA741 opamp

That was the trick! I fixed by adding a new voltage source of -15V (i called Vee) But why is not -Vcc the same as Vcc multiplied by -1? Vcc is 15V so -Vcc should be -15 V but it doesn't work this way!! Anyway, thanks! You have a node named -Vcc. You haven't attached this node to anything

Re: gEDA-user: problem to simulate an astable multivibrator with uA741 opamp

On Apr 15, 2009, at 8:55 AM, joseda wrote: That was the trick! I fixed by adding a new voltage source of -15V (i called Vee) But why is not -Vcc the same as Vcc multiplied by -1? Vcc is only a name of a network. Vcc is 15V V(Vcc) is 15V. Vcc is just a name. Now in *some* cases,

gEDA-user: Found pins without the 'pintype' attribute:

Hi, I'm making a small project of the PIC Programator. I find the Schematic on the internet.. I have done already the Schematic. The schematic can be find here on my webserver: http://csanyi-pal.info/apache2-default/letoltes/gEDA_schematics/ I run on it gnetlist. Only one NOTE I get: NOTE:

Re: gEDA-user: Found pins without the 'pintype' attribute:

On Apr 15, 2009, at 11:03 AM, Csanyi Pal wrote: Hi, I'm making a small project of the PIC Programator. I find the Schematic on the internet.. I have done already the Schematic. The schematic can be find here on my webserver:

gEDA-user: Schematic bundler?

I'm sure I've seen this discussed recently, but I can't find any threads to pick up and follow... Is there a way to suck all the gschem symbols into my schematic for archiving and/or distribution? Thanks, Eric ___ geda-user mailing list

Re: gEDA-user: Schematic bundler?

On Wed, Apr 15, 2009 at 6:24 PM, Eric Brombaugh ebrombau...@cox.net wrote: I'm sure I've seen this discussed recently, but I can't find any threads to pick up and follow... Is there a way to suck all the gschem symbols into my schematic for archiving and/or distribution? I may have been the

Re: gEDA-user: Schematic bundler?

gschlas -e foo.sch My Makefiles copy foo.sch to tmp.sch, gschlas *that*, then copy tmp.sch to it's final destination. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user

Re: gEDA-user: Schematic bundler?

John Luciani wrote: On Wed, Apr 15, 2009 at 6:24 PM, Eric Brombaugh ebrombau...@cox.net wrote: I'm sure I've seen this discussed recently, but I can't find any threads to pick up and follow... Is there a way to suck all the gschem symbols into my schematic for archiving and/or distribution?

Re: gEDA-user: Schematic bundler?

DJ Delorie wrote: gschlas -e foo.sch My Makefiles copy foo.sch to tmp.sch, gschlas *that*, then copy tmp.sch to it's final destination. Thanks - sounds nice and clean. Makefiles = good. Eric ___ geda-user mailing list geda-user@moria.seul.org