Looking for an LTspice model for the MAX 31740 Ultra-Simple Fan-Speed Controller.? Although AD has apparently acquired Maxim, they haven't developed a model for this device.? Has any members attempted to create one?
Thanks,
John
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That's the home PC:
OS Name Microsoft Windows 11 Pro
System Name XOTIC-PC
System Manufacturer ASUS
System Model System Product Name
Processor 13th Gen Intel(R) Core(TM) i9-13900K, 3000 Mhz, 24 Core(s), 32 Logical Processor(s)
BaseBoard Manufacturer ASUSTeK COMPUTER INC.
BaseBoard Product ROG STRIX Z790-E GAMING WIFI
Installed Physical Memory (RAM) 128 GB
Total Physical Memory 128 GB
Available Physical Memory 72.0 GB (Ramdisk is taking 64G)
Total Virtual Memory 170 GB
Available Virtual Memory 79.8 GB
Page File Space 41.8 GB
Instead of guessing, use Task Manager to check the performance.
You should be able to easily see which resource is being used the most.
Are you sure the work PC has 128GB of ram?
Specifically, which processor?
-- K1FZY (WA4TPW) SK? 9/29/37-4/13/15
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Instead of guessing, use Task Manager to check the performance.
You should be able to easily see which resource is being used the most.
Are you sure the work PC has 128GB of ram?
Specifically, which processor?
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David asked, "Aren't they in the folder you're working in by default?"
LTspice also has a location for "Temporary Files".? Go to its Control Panel > Operation tab.? It's at the bottom of that tab.? I think the default location is your Windows Temp folder.
I do not know with certainty what is meant by those Temporary Files.? LTspice's Help suggests that they are created when doing a Sync Release, so it is not while simulating.? I also once saw it suggested that the Temporary Files location was used while doing a Conversion of .RAW files to Fast Access.? Again, that is not while simulating.
I suppose it is possible that LTspice opens additional unnamed Temporary Files while it is simulating, and it's possible that we don't see those files while it's running.? I am not aware that LTspice does this, but I would not totally discount the possibility.? The files it creates while simulating include the .NET, .LOG, and .RAW files, of which only the .NET file is really temporary.? But the .LOG and .RAW files can optionally be directed to a different directory location, separate from your default (schematic) location.? You would not want that to be anywhere with slower access.
Andy
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Aren't they in the folder you're working in by default?
Have you modified the settings in LTspice so that? temporary files and working files are in a folder on the ramdisk?
-- K1FZY (WA4TPW) SK? 9/29/37-4/13/15
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Actually, FFT and Inverse FFT are essentially the same algorithms, so the second FFT is really an IFFT, converting the spectrum back into a time-domain waveform.
I expect that the .imp file is the same sort of binary file as an .fft or .raw file.? It should have a readable header at the top that lists the LTspice settings and the signal name, followed by binary data for the remainder of the file.
Obviously it has nothing whatsoever to do with Adobe Audition, but that was the result?because it may be the most common use of ".imp" as a filename's extension.? The web search doesn't check what is actually inside the file.? Nobody actually "owns" any filename extension.
Andy
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I don’t recommend opening it with a text editor.
11 lines of text, describing the file, 1 line “Binary:”, and 4 MB of … binary.
?
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Show quoted text
From: [email protected] <[email protected]>
On Behalf Of John Woodgate
Sent: Sunday, July 02, 2023 12:41 PM
To: [email protected]
Subject: EXTERNAL: Re: [LTspice] .imp file
?
I didn't intend to do an FFT of an FFT, but that might have happened by accident.? A spectrum of a spectrum is a cepstrum, which has similar anagrammatic concepts such as quefrency.
======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only
Rayleigh, Essex UK
I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)
On 2023-07-02 20:31, Andy I wrote:
John wrote, "but I've never seen an .IMP file before."
So you probably never did an FFT of an FFT before.? I think that is the only time you get such a file.? LTspice's Help recommends doing that as a way to get uniform timesteps.? There might be other reasons to do it, but it's not the first thing I ever think
of doing.
Andy
|
I didn't intend to do an FFT of
an FFT, but that might have happened by accident.? A spectrum
of a spectrum is a cepstrum, which has similar anagrammatic
concepts such as quefrency.
======================================================================================
Best wishes
John Woodgate OOO-Own Opinions Only
Rayleigh, Essex UK
I hear, and I forget.
I see, and I remember.
I do, and I understand.
Xunzi (340 - 245 BC)
On 2023-07-02 20:31, Andy I wrote:
toggle quoted message
Show quoted text
John wrote, "but I've never seen
an .IMP file before."
So you probably never did an FFT of an FFT before.? I think that
is the only time you get such a file.? LTspice's Help recommends
doing that as a way to get uniform timesteps.? There might be
other reasons to do it, but it's not the first thing I ever think
of doing.
Andy
|
John wrote, "but I've never seen an .IMP file before."
So you probably never did an FFT of an FFT before.? I think that is the only time you get such a file.? LTspice's Help recommends doing that as a way to get uniform timesteps.? There might be other reasons to do it, but it's not the first thing I ever think of doing.
Andy
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Well, I have done? a lot of
FFTs in the past , and .FOUR, but I've never seen an .IMP file
before.
======================================================================================
Best wishes
John Woodgate OOO-Own Opinions Only
Rayleigh, Essex UK
I hear, and I forget.
I see, and I remember.
I do, and I understand.
Xunzi (340 - 245 BC)
On 2023-07-02 20:24, Andy I wrote:
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Show quoted text
It is indeed an "Impulse response" file, the result of performing
an FFT of the FFT's output.? Like regular .fft files, LTspice
leaves it around for you to delete if you choose to.? If I'm not
mistaken, I think you can also drag and drop it in LTspice if you
want to see it again.? Otherwise, it's not of much use to you.
Andy
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It is indeed an "Impulse response" file, the result of performing an FFT of the FFT's output.? Like regular .fft files, LTspice leaves it around for you to delete if you choose to.? If I'm not mistaken, I think you can also drag and drop it in LTspice if you want to see it again.? Otherwise, it's not of much use to you.
Andy
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Have you modified the settings in LTspice so that? temporary files and working files are in a folder on the ramdisk?
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This is an impulse response output from LTspice. I think it is the FFT of an FFT done. You can delete it.
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On 02/07/2023 19:05, John Woodgate wrote:
Isn't the normal way of doing this
to create a 'Project' folder that automatically contains
folders for each data type (i.e. each .extension) that can all
'see' each other? Like a PCB design project.
The problem with this is it won't contain anything from LTspice's
distribution. We know that, over time, devices are added to standard
libraries. But also devices are deleted - usually without
announcement. If a project uses any of those, it won't be able to
find them. This is what has happened to many of LTspice's own
example schematics, which are currently being fixed - there are
hundreds of them.
--
Regards,
Tony
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On 02/07/2023 18:53, John Woodgate wrote:
I just did a simulation of a simple
active filter, to look at distortion of the filtered signal,
and after LTspice has closed, it has left a file called
'Filter.imp' in the schematic folder. It's 4097 KB, but
LTspice won't open it. A web search suggests that it is a
Adobe Audition file. I don't want to have to buy Audition!
Changelog doesn't give a clue.
Try opening it in a text editor just for a look, or just try
dragging it from Explorer into an open LTspice session - it would
then be opened by LTspice as a text file. LTspice initially assumes
everything is text unless it turns out not to be.
--
Regards,
Tony
|
On 02/07/2023 18:59, eetech00 via groups.io wrote:
On Sun, Jul 2, 2023
at 09:21 AM, Tony Casey wrote:
Another way that this issue could be solved is an
"archive" function, that collects together all the files a
project needs and puts them a zip. Ideally, this should be an
LTspice function, as it already knows where it got all the files
a schematic uses.
Hmm. interestingly, I happen to be working on a powershell script
to do just that (although, I'm guessing yours would probably be
designed for linux OS).
I imagine, however, that there would have to be options configured
by the user to cover the multitude of library management methods.
No, the first very basic mockup was done in a bash script, simply to
get an idea how it should work. But anything for the masses has to
be multi-platform. I'd not even considered Powershell. I don't know
if it is supported in Wine. I don't see why it shouldn't be. DOS cmd
scripting works, but after bash, using it is just horrible. Python
is inherently multi-platform and can do just about anything. There's
also no reason it can't be done in C/C++ and compiled for almost any
platform with GCC.
Like I said, though, ideally it should be within LTspice. Other
simulators and EDA tools have had this kind of functionality for
decades. Vlad and I also talked about this some years ago. Maybe he
got further than I did. But I think he was also working in bash at
the time, as a fellow Arch Linux user.
If you manage to get something running, I'm sure it would be very
well received and appreciated.
--
Regards,
Tony
|
I have a folder named "Components", where I put the basic sims of
individual devices. Each one has a folder with the .asc, .sym and
model in it.
When I want to sim a circuit that usees one of these devices, I
open the .asc, copy the device and .inc or .sub command into the
new file. Then I need to open both the "Components" folder and the
folder in which I have created the new circuit for copying the
needed .sym and model files.
Wouldn't it be nice if just copying the device would
simultaneously copy the other files?
Le 02/07/2023 à 19:05, John Woodgate a
écrit?:
toggle quoted message
Show quoted text
Isn't the normal way of doing
this to create a 'Project' folder that automatically
contains folders for each data type (i.e. each .extension)
that can all 'see' each other? Like a PCB design project.
======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only
Rayleigh, Essex UK
I hear, and I forget. I see, and I remember. I do, and I
understand. Xunzi (340 - 245 BC)
On 2023-07-02 17:59, eetech00 via
groups.io wrote:
On Sun, Jul 2, 2023 at 09:21 AM, Tony Casey wrote:
Another way that this issue could be solved is an
"archive" function, that collects together all the files a
project needs and puts them a zip. Ideally, this should be an
LTspice function, as it already knows where it got all the
files a schematic uses.
Hmm. interestingly, I happen to be working on a powershell
script to do just that (although, I'm guessing yours would
probably be designed for linux OS).
I imagine, however, that there would have to be options
configured by the user to cover the multitude of library
management methods.
|
Isn't the normal way of doing
this to create a 'Project' folder that automatically contains
folders for each data type (i.e. each .extension) that can all
'see' each other? Like a PCB design project.
======================================================================================
Best wishes
John Woodgate OOO-Own Opinions Only
Rayleigh, Essex UK
I hear, and I forget.
I see, and I remember.
I do, and I understand.
Xunzi (340 - 245 BC)
On 2023-07-02 17:59, eetech00 via
groups.io wrote:
toggle quoted message
Show quoted text
On Sun, Jul 2, 2023 at 09:21 AM, Tony Casey wrote:
Another way that this issue could be solved is an
"archive" function, that collects together all the files a
project needs and puts them a zip. Ideally, this should be an
LTspice function, as it already knows where it got all the files
a schematic uses.
Hmm. interestingly, I happen to be working on a powershell script
to do just that (although, I'm guessing yours would probably be
designed for linux OS).
I imagine, however, that there would have to be options configured
by the user to cover the multitude of library management methods.
|
On Sun, Jul 2, 2023 at 09:21 AM, Tony Casey wrote:
Another way that this issue could be solved is an "archive" function, that collects together all the files a project needs and puts them a zip. Ideally, this should be an LTspice function, as it already knows where it got all the files a schematic uses.
Hmm. interestingly, I happen to be working on a powershell script to do just that (although, I'm guessing yours would probably be designed for linux OS). I imagine, however, that there would have to be options configured by the user to cover the multitude of library management methods.
|
I just did a simulation of a
simple active filter, to look at distortion of the filtered
signal, and after LTspice has closed, it has left a file
called 'Filter.imp' in the schematic folder. It's 4097 KB, but
LTspice won't open it. A web search suggests that it is a
Adobe Audition file. I don't want to have to buy Audition!
Changelog doesn't give a clue.
--
======================================================================================
Best wishes
John Woodgate OOO-Own Opinions Only
Rayleigh, Essex UK
I hear, and I forget.
I see, and I remember.
I do, and I understand.
Xunzi (340 - 245 BC)
|
John Waugaman
Bell, Dave
John Woodgate
Tony Casey