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LTspice

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XL-power

New Member
hi all,

am new to LTspice, could anyone help me? how can i make my program to draw the dissipated power versus a variable resistor?

(power versus resistor)
my circuit is completed, just my problem is how can i make the program to do so?

thanks in advance
 

Sceadwian

Banned
You started with a topic slightly more complex than it first appears. I've never seen a variable resistor properly modeled in LTspice. You can STEP a resistor value through a single simulation over a set of values but constant variability is not so easy.

You don't need LTSpice to determine power over a resistor though, all you need to know is the voltage and use a calculator.
 

MikeMl

Well-Known Member
Most Helpful Member
First, this topic should be in This forum.


Second, does this do what you want?

Third, here is an alternate way to do it, where the resistor is a function of time.
 

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XL-power

New Member
You started with a topic slightly more complex than it first appears. I've never seen a variable resistor properly modeled in LTspice. You can STEP a resistor value through a single simulation over a set of values but constant variability is not so easy.

You don't need LTSpice to determine power over a resistor though, all you need to know is the voltage and use a calculator.
thanks for your reply, but i do , i need power versus resistor
i use "MikeMl" method and it works
 
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