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Multisim and Ultiboard

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MultiSim model of a logarithmic potentiometer

Hi,

I'm working on a vintage compressor (MXR Dynacomp Vintage compressor) and I need a MultiSim model of a logarithmic potentiometer in order to model the system.

Thanks,

Victor

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Message 1 of 9
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Hello.

 

It looks like  MS 14 does not have it.

 

but there is work around - you can use voltage controlled resistor ( located here :  basic-> basic virtual) and control it with logarithmic voltage.

 

if you need more details, let me know.

 

good luck

 

Michael

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Message 2 of 9
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This is an old thread but it's exactly what I need.

 

"logarithmic voltage" you mean with a parameter sweep?

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Message 3 of 9
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Возможно,  это поможет решить проблему.

Message 4 of 9
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yeah thank you!

 

What if in my circuit the pot has a floating pin 1 though?

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Message 5 of 9
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Выкладывайте вашу модель в формате "ms".
Я проверил модель потенциометра (линейного) аж до 1e+306(моделируется долго)
Сделать только характеристику другую...

tipa_0-1675224388779.png

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tipa_0-1675227539997.pngtipa_1-1675227609065.png

 

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Message 7 of 9
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tipa_0-1675228463501.png

Можно вставлять другие функции изменения сопротивления, какие имеются в перечне MS-14

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Message 8 of 9
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Вот тут профессионал точную модель задал. Если spice-sintax ваш друг, то создадите себе такой же ...

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