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Really struggling with limiting potentiometer range
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Vovk_Z:
There is may be something wrong with voltmeter XMM2 input impedance.
Renate:
The problem is, your simulator is taking "1M" as one milliohm.
I don't know if it's misinterpreting "500R".
Try putting straight numbers on everything.
Zero999:
SPICE doesn't like zero Ohm resistors, which is why I imagine it causes problems. It also somewhat mirrors reality, since the potentiometer will always have a tiny wiper resistance.

As mentioned above, there's no need to simulate this, just work it out. In reality, you'll probably require some out of range operation, due to component tolerances. Potentiometers typically have a very poor tolerance of 10% or worse. One way round this is to connect another, much lower value 1% tolerance resistor in parallel with the potentiometer, but it will result in extra power draw.
Nerull:
SPICE also isn't case sensitive, you'll have the same M/m problem in LTSpice. SPICE requires a 5M resistor to be written as 5MEG.
SiliconWizard:

--- Quote from: Nerull on January 26, 2020, 06:18:59 pm ---SPICE also isn't case sensitive, you'll have the same M/m problem in LTSpice. SPICE requires a 5M resistor to be written as 5MEG.

--- End quote ---

Indeed. :D
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