I don't know if the problem is just with the actual version XVII of LTSpice, but it doesn't work for Val=100. I get the failure that the resistor R2 can't be 0. I fixed that with a change of the formula for Rb: .param Rb=1.00000001*R(1-(Val/100)). It works now :)
Works very well. Thank You! I learned you must pay attention to every detail and if problems occur, as I had on second schematic, save and relaunch as second schematic did not give the proper Navigate/Edit Schematic Block until I did so.
para los que les salió el error de "missing schematic for hierarchical symbol pot.", es por que el esquemático donde van a utilizar el potenciómetro que han creado, debe estar en la misma carpeta en donde guardaron los archivos de símbolo y esquemático del potenciómetro. recomiendo que creen una carpeta en un lugar de fácil acceso (como en el escritorio), luego guarden allí los archivos de símbolo y esquemático del potenciómetro, finalmente creen un nuevo esquemático(su muevo proyecto) y guárdenlo en esa carpeta, verán que cuando quieran agregar un nuevo símbolo, aparecerá también la dirección de la carpeta guardada y en ella el potenciómetro listo para usar. espero que sea de mucha ayuda. saludos desde Perú.
an elegant video. How can the Analog Devices AD202KN isolation amplifier be used in LTspice? The only spice download found was a snapEDA. Is it useable in LTspice for circuit simulation? thank you.
Have a look at this. The Tap parameter is the percentage of the total Value of the pot, the is tap positioned. www.dropbox.com/s/grjngrllr3pksx2/Tapped-Pot.zip?dl=0 . I will have a look for the stereo one.
i'm using ltspice XVI, i could not use '}' it stated that ( '}' is not allowed in an instance name unles it is a BUS'ed instance.) so i have change the curve bracket into "[ ]" but when i compile it stated that " Can't find definition of model "R" "
Let's say I want to test a 500k Pot but don't want to do all this creating... if I used a 500k Resistor would that be the same but I know giving me the full 500k force? That is all I want anyway... the schematic calls for a 500k reverse log pot, but I want to test it at max anyway. Couldn't I just use a 500k resistor> ??
Done it... I added a 4th leg based on your video and labelled the 4th leg "4" (for obvious reasons...). I now have a tapped pot symbol. I set the tap at 50%. BTW... Thanks for your informative video... I only started using LT Spice a week ago and following your instructions I now have a tapped pot symbol...
For anyone else that seems to be having this issue, I found that saving it in the same area as my other spice files made it appear. For example, I saved it to a desktop folder called EE122 Lab because that's where I save my schematics. Not exactly sure 'why' this made it work, but... there it is.
at 10:28 minute i cant find Navigate/Edit Schematic Block, just a "Component Attribute Editor" , so i couldnt fill the PARAMS gap :( Can anyone help me please!!!
I am trying this and have been over and over the video and checked everything (I think) I keep getting the following.... Error on line 6 : r:x1:1 n001«:1» nc_01«:2» r(a) Unable to find definition of model "r" * Unknown parameter "a" Error on line 7 : r:x1:2 nc_01«:2» 0«:3» r(b) Unable to find definition of model "r" * Unknown parameter "b" Fatal Error: Missing resistance value for "x1:r2" What's happened? Also the curly brackets {} don't appear to work. It seems to need the round brackets () - I am using Version 4.23k
this is not a potentiometer at all. A simulated potmeter must have a simulated axis moving the contactpoint 2 over simulated carbon film etc. but most imprtantly: it should have a (simulated) knob that the user (that is me!) can turn around, in real time, with an electrical effect in Spice, without recompiling! Your propose a simulated voltage divider. A complicated and smart one, nice. But is NOT a potentiometer, since the user cannot turn the knob. LTSpice has of july 2018 no potentiometer? Even after 30 years of existence Human Control is still ignored by LTSpice? In fact LTSpce has no significant real world interaction at all, but why not give people at least a good work around?
LTspice doesn't offer "real time" simulation. And I am not aware of any SPICE engine to offer it. You can use the tools it offers to have variable quantities though.
that is my point indeed: a potmeter is a realtime device. And therefor you cannot make a potmeter in simulations. Only workarounds. And sorry to say but then your title is misleading. Ppl who watch your video expect a potentionmeter solution, not a "non interactive workaround".
I belief taht what he meant is, that there should be an input knot (lets say 0..1V) which equals the potentiometer position (0 to 100%). This way you can do nice system simulations.
Not really, because we pretty much already know how LTSpice works. It is a simulated potentiometer, just in the same way that if use a voltage source I don't ask where can I turn the knob to adjust the level, or if I adjust the temperature of the simulation I don't have to have a thermostat on the wall. I can do a series of sweeps if I want to see the behavior over operating conditions. :)
Why the F potentiometer isn't built in by default ?
@Immanuel Nolan any askers?
THANK YOU!! YOU'RE A BEAST!!! We couldn't find this tutorial anywhere.
I don't know if the problem is just with the actual version XVII of LTSpice, but it doesn't work for Val=100. I get the failure that the resistor R2 can't be 0. I fixed that with a change of the formula for Rb: .param Rb=1.00000001*R(1-(Val/100)). It works now :)
Works very well. Thank You! I learned you must pay attention to every detail and if problems occur, as I had on second schematic, save and relaunch as second schematic did not give the proper Navigate/Edit Schematic Block until I did so.
Great work sir, very helpful
Thanks, but why is there no simple pot please ? I would have thought LT would want to encourage beginners, this just put me off...cheers.
Brilliant - thank you
para los que les salió el error de "missing schematic for hierarchical symbol pot.", es por que el esquemático donde van a utilizar el potenciómetro que han creado, debe estar en la misma carpeta en donde guardaron los archivos de símbolo y esquemático del potenciómetro.
recomiendo que creen una carpeta en un lugar de fácil acceso (como en el escritorio), luego guarden allí los archivos de símbolo y esquemático del potenciómetro, finalmente creen un nuevo esquemático(su muevo proyecto) y guárdenlo en esa carpeta, verán que cuando quieran agregar un nuevo símbolo, aparecerá también la dirección de la carpeta guardada y en ella el potenciómetro listo para usar.
espero que sea de mucha ayuda. saludos desde Perú.
Gracias!
como pongo para que me salga la ventana next name xfa
@@ignacioizurieta5453 Esto es impresionante. Hola desde kazajo
@@hashiramasenju293 hola
Είσαι θεός
Doesn't anyone have a pot file?
Excellent video. Thank you.
Thanks excellent video, and just what I was looking for...
Thank you, very much!!
Thanks bro ❤
Exactly what i was looking for thank you so much
Thank you for the video. It helped me a lot.
How do you get to the attribute window on OSX at 8:36. Anyone know if it's a shortcut???
This was great! Thanks!
Thank you very much, it works great!
an elegant video. How can the Analog Devices AD202KN isolation amplifier be used in LTspice? The only spice download found was a snapEDA. Is it useable in LTspice for circuit simulation? thank you.
thaks, this works very well
Thank you so much
This video is the best
very nice work! Thank You
Thanks!
17-3-2021
Grande bro
Thanks for your advices. I just need a symbol and function for mono- and stereo-potis.
Have a look at this. The Tap parameter is the percentage of the total Value of the pot, the is tap positioned. www.dropbox.com/s/grjngrllr3pksx2/Tapped-Pot.zip?dl=0 . I will have a look for the stereo one.
where did you save your .sch file? it says that missing schematic for hierarchical symbol pot. Thanks
Nagyon király! :) Very good, thank you!
Thanks!!
Thanks!!!!, very useful!!!
Thx a lot!
Good job. But how to sweep this R ??? Without the sweep it is not very usefull.
i'm using ltspice XVI, i could not use '}' it stated that ( '}' is not allowed in an instance name unles it is a BUS'ed instance.)
so i have change the curve bracket into "[ ]" but when i compile it stated that " Can't find definition of model "R" "
u r selecting the wrong place
I encountered an issue. When I want to use the potentiometer, it displays the message "Unused ports". Where might be the problem?
Maybe a change in the newer versions of LT? I will have to try it.
@@fir3w4lk3r I think so, too. I installed it back in 2020 and has been recieving updates ever since
Let's say I want to test a 500k Pot but don't want to do all this creating... if I used a 500k Resistor would that be the same but I know giving me the full 500k force? That is all I want anyway... the schematic calls for a 500k reverse log pot, but I want to test it at max anyway. Couldn't I just use a 500k resistor> ??
Firewalker have you produced a tapped potentiometer symbol, for example one that is used on a pre-amp loudness control circuit?
No. I did had the need for one. If I find the time I will have a go at it.
Done it... I added a 4th leg based on your video and labelled the 4th leg "4" (for obvious reasons...).
I now have a tapped pot symbol. I set the tap at 50%.
BTW... Thanks for your informative video... I only started using LT Spice a week ago and following your instructions I now have a tapped pot symbol...
was working fine yesterday. but now missing schematic(s) of hierarchy pot
It worked when I placed both .asc and .asy files in sym folder
i am getting an error saying netlist warning in block pot and unused ports . what might be the error
Thanks, this was very useful
polu kalo mpravo sou!
Very helpful!! thank you!
:( where do I save the .asc file, it cant seem to find the schematic
For anyone else that seems to be having this issue, I found that saving it in the same area as my other spice files made it appear. For example, I saved it to a desktop folder called EE122 Lab because that's where I save my schematics. Not exactly sure 'why' this made it work, but... there it is.
at 10:28 minute i cant find Navigate/Edit Schematic Block, just a "Component Attribute Editor" , so i couldnt fill the PARAMS gap :( Can anyone help me please!!!
Just right click on the part.
I am trying this and have been over and over the video and checked everything (I think)
I keep getting the following....
Error on line 6 : r:x1:1 n001«:1» nc_01«:2» r(a)
Unable to find definition of model "r"
* Unknown parameter "a"
Error on line 7 : r:x1:2 nc_01«:2» 0«:3» r(b)
Unable to find definition of model "r"
* Unknown parameter "b"
Fatal Error: Missing resistance value for "x1:r2"
What's happened?
Also the curly brackets {} don't appear to work. It seems to need the round brackets () - I am using Version 4.23k
+TinyWords Just checked it with 4.23k and it still works fine. Can you upload your files?
Thanks. Let me go over it again, maybe there is something I've missed. If I cannot find the answer I will post a link to the file.
+TinyWords To the file pot.asc change R(a) and R(b) to {Ra} and {Rb}. Dont put only "a" or "b" to inside curly brackets.
+firewalker
Ah, yes that worked. That was a stupid mistake, I don't know why I missed that! Thanks.
res.asy is not present in symbols(asy) file type. what do i do now?
res.asy should be in C:\Program Files\LTC\LTspiceXVII\lib\sym i.imgur.com/Ey3OwuN.png
Cheers to the Greek
this is not a potentiometer at all. A simulated potmeter must have a simulated axis moving the contactpoint 2 over simulated carbon film etc. but most imprtantly: it should have a (simulated) knob that the user (that is me!) can turn around, in real time, with an electrical effect in Spice, without recompiling!
Your propose a simulated voltage divider. A complicated and smart one, nice.
But is NOT a potentiometer, since the user cannot turn the knob.
LTSpice has of july 2018 no potentiometer? Even after 30 years of existence Human Control is still ignored by LTSpice?
In fact LTSpce has no significant real world interaction at all, but why not give people at least a good work around?
LTspice doesn't offer "real time" simulation. And I am not aware of any SPICE engine to offer it. You can use the tools it offers to have variable quantities though.
that is my point indeed: a potmeter is a realtime device. And therefor you cannot make a potmeter in simulations. Only workarounds. And sorry to say but then your title is misleading. Ppl who watch your video expect a potentionmeter solution, not a "non interactive workaround".
I belief taht what he meant is, that there should be an input knot (lets say 0..1V) which equals the potentiometer position (0 to 100%). This way you can do nice system simulations.
Not really, because we pretty much already know how LTSpice works. It is a simulated potentiometer, just in the same way that if use a voltage source I don't ask where can I turn the knob to adjust the level, or if I adjust the temperature of the simulation I don't have to have a thermostat on the wall. I can do a series of sweeps if I want to see the behavior over operating conditions. :)