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LTSpice query

Started by Cursitor Doom December 31, 2019
Greetings, gentlemen,

The image below is how I've been representing variable resistors in
LTS for like ever. But this circuit fragment - because it contains a
disproportionately large number of variable resistors compared to
everything else- really forced me to face up to the issue that I'm
doing something wrong here. There must surely be a more elegant way
than making up v.res out of two fixed resistors and tapping the node
between them for the wiper?

https://tinyurl.com/tceoloz
-- 

"When constituencies are small their elected representatives must concern themselves with 
the local interests of their constituents. When political representatives are distant and 
faceless, on the other hand, and represent vast numbers of unknown constituents, they 
represent not their constituents, but special interest groups whose lobbyists are numerous 
and ever present. Typically in Europe a technocrat is an ex-politician or a civil servant. 
He is unelected, virtually impossible to dislodge during his term of employment and has 
been granted extensive executive and even legislative power without popular mandate and 
without being directly answerable to the people whose interests he falsely purports to
represent."                                       

 - Sir James Goldsmith (Member of the European Parliament) 1933 - 1997
Cursitor Doom wrote:
> Greetings, gentlemen, > > The image below is how I've been representing variable resistors in > LTS for like ever. But this circuit fragment - because it contains a > disproportionately large number of variable resistors compared to > everything else- really forced me to face up to the issue that I'm > doing something wrong here. There must surely be a more elegant way > than making up v.res out of two fixed resistors and tapping the node > between them for the wiper? > > https://tinyurl.com/tceoloz >
Too dinky to see properly; try some other way (eg: LT Spice listing).
On Wed, 1 Jan 2020 11:17:28 -0800, Robert Baer
<robertbaer@localnet.com> wrote:

>Cursitor Doom wrote: >> Greetings, gentlemen, >> >> The image below is how I've been representing variable resistors in >> LTS for like ever. But this circuit fragment - because it contains a >> disproportionately large number of variable resistors compared to >> everything else- really forced me to face up to the issue that I'm >> doing something wrong here. There must surely be a more elegant way >> than making up v.res out of two fixed resistors and tapping the node >> between them for the wiper? >> >> https://tinyurl.com/tceoloz >> > Too dinky to see properly; try some other way (eg: LT Spice listing).
"ExpressPCB Netlist" "LTspice IV Version 4.23l" 1 0 0 "" "" "" "Part IDs Table" "V1" "20" "" "V2" "10" "" "R1" "500" "" "R2" "500" "" "R3" "3850" "" "R4" "2500" "" "R5" "19.6k" "" "D1" "MBR0520L" "" "R6" "2500" "" "R7" "2500" "" "R8" "2500" "" "R9" "46.4k" "" "R10" "6810" "" "R11" "1470" "" "Net Names Table" "N001" 1 "0" 3 "N005" 9 "N002" 12 "N003" 16 "N004" 18 "Vref" 21 "N007" 23 "N006" 26 "Net Connections Table" 1 1 1 2 1 5 1 0 2 1 2 4 2 2 1 5 2 3 1 6 2 9 2 7 2 10 1 8 2 14 2 0 3 2 2 10 3 4 2 11 3 11 2 0 4 3 2 13 4 4 1 14 4 5 2 15 4 8 2 0 5 6 1 17 5 8 1 0 6 6 2 19 6 9 1 20 6 12 2 0 7 7 1 22 7 12 1 0 8 7 2 24 8 13 1 25 8 14 1 0 9 10 2 27 9 11 1 28 9 13 2 0 -- "The BEST Deal is NO DEAL"
Cursitor Doom wrote:
> "ExpressPCB Netlist" > "LTspice IV Version 4.23l" > 1 > 0 > 0 > "" > "" > "" > "Part IDs Table" > "V1" "20" "" > "V2" "10" "" > "R1" "500" "" > "R2" "500" "" > "R3" "3850" "" > "R4" "2500" "" > "R5" "19.6k" "" > "D1" "MBR0520L" "" > "R6" "2500" "" > "R7" "2500" "" > "R8" "2500" "" > "R9" "46.4k" "" > "R10" "6810" "" > "R11" "1470" "" > > "Net Names Table" > "N001" 1 > "0" 3 > "N005" 9 > "N002" 12 > "N003" 16 > "N004" 18 > "Vref" 21 > "N007" 23 > "N006" 26 > > "Net Connections Table" > 1 1 1 2 > 1 5 1 0 > 2 1 2 4 > 2 2 1 5 > 2 3 1 6 > 2 9 2 7 > 2 10 1 8 > 2 14 2 0 > 3 2 2 10 > 3 4 2 11 > 3 11 2 0 > 4 3 2 13 > 4 4 1 14 > 4 5 2 15 > 4 8 2 0 > 5 6 1 17 > 5 8 1 0 > 6 6 2 19 > 6 9 1 20 > 6 12 2 0 > 7 7 1 22 > 7 12 1 0 > 8 7 2 24 > 8 13 1 25 > 8 14 1 0 > 9 10 2 27 > 9 11 1 28 > 9 13 2 0 > --
Well, i imported the above as a file into ExpressPCB with no complaints after deleting the last line "--" and saw nothing. And what does LTSpice have to do with ExpressPCB?
On Thu, 2 Jan 2020 10:34:59 -0800, Robert Baer
<robertbaer@localnet.com> wrote:

> Well, i imported the above as a file into ExpressPCB with no >complaints after deleting the last line "--" and saw nothing. > And what does LTSpice have to do with ExpressPCB?
No idea at all. ISTR I have the same trouble every time I try to post an LT spice diagram. Some kind soul has to come along and remind me where to find the correct thing to select under which tab in order to do it. Perhaps I'll try to upload the schematic again; blow it up a bit more this time..... -- "The BEST Deal is NO DEAL"
You take the ASC file and rename it to the TXT extension - IF YOU CAN. I can do it in XP, Vista, 98, if you got newer shit then you might not be able to. I think you have to go in Windows Explorer and tell it to show extensions of registered file types but they got that all fucked up. The fucking things won't even let me into MY Sendto directory.
> Well, i imported the above as a file into ExpressPCB with no >complaints after deleting the last line "--" and saw nothing. > And what does LTSpice have to do with ExpressPCB?
Okay, I've blown the original image up somewhat. See if this is any more readable: https://tinyurl.com/wgh55ob -- "The BEST Deal is NO DEAL"
I just looked it up, it can be done. You have to type shell:sendto in a a box somewhere. Just Google it and read it. Once others get it then in my case it will save as a TXT from in here and then I rename it to ASC. But if you put LTSpice in the sendto there should be no problem forcing it into LTSpice. 

If you get to Windows Explorer somehow and tell it to show all file extensions then you have to remember whenever you rename a file you MUST include the proper - or desired - extension or it won't work until you do, unless you sendto it. 

Now that I know this I guess I am not going to throw that Win 7 PC in the trash. Still I can't believe how many settings and features that are no longer there. I can't find how to set my theme for the desktop, looks like I got no choice but to use one of their canned  ones. 

And if the settings exist, what fucking possible reason could there be for them to hide them by moving them around ? 

Now in Vista and better (older) Notepad does not do the line feeds so it looks all thrown together, but when you C&P it in here it is straightened out. That may be now longer true. The more money you spend the less you can do so don't count on it. But what you posted up there does not look at all like an LTSpice file. 

On Thursday, January 2, 2020 at 4:40:45 PM UTC-5, jurb...@gmail.com wrote:
> You take the ASC file and rename it to the TXT extension - IF YOU CAN. I can do it in XP, Vista, 98, if you got newer shit then you might not be able to. I think you have to go in Windows Explorer and tell it to show extensions of registered file types but they got that all fucked up. The fucking things won't even let me into MY Sendto directory.
Seeing and changing file name extensions in Win Vista, 8 and 10 are all the same and easy peasy. I expect it is exactly the same as in XP and 7 but I never had those versions... wait, I do have a netbook with 7 and it's the same as well. Easy peasy. -- Rick C. - Get 1,000 miles of free Supercharging - Tesla referral code - https://ts.la/richard11209
On Thu, 2 Jan 2020 13:54:23 -0800 (PST), jurb6006@gmail.com wrote:

>I just looked it up, it can be done. You have to type shell:sendto in a a box somewhere. Just Google it and read it. Once others get it then in my case it will save as a TXT from in here and then I rename it to ASC. But if you put LTSpice in the sendto there should be no problem forcing it into LTSpice. > >If you get to Windows Explorer somehow and tell it to show all file extensions then you have to remember whenever you rename a file you MUST include the proper - or desired - extension or it won't work until you do, unless you sendto it. > >Now that I know this I guess I am not going to throw that Win 7 PC in the trash. Still I can't believe how many settings and features that are no longer there. I can't find how to set my theme for the desktop, looks like I got no choice but to use one of their canned ones. > >And if the settings exist, what fucking possible reason could there be for them to hide them by moving them around ? > >Now in Vista and better (older) Notepad does not do the line feeds so it looks all thrown together, but when you C&P it in here it is straightened out. That may be now longer true. The more money you spend the less you can do so don't count on it. But what you posted up there does not look at all like an LTSpice file.
Okay, thanks well I'll give it a try tomorrow as it's late here now. I still keep a backup of LTS IV for this sort of reason; in fact that one I posted was created with IV. -- "The BEST Deal is NO DEAL"