Variable resistor in LTspice

[@Antyelektronika]

Thank you for this video. Would be a chance to make video about all options in LTspice?

[@eesanity]

Thanks for your suggestion. A few options are covered in my Udemy course. Do you have any particular questions?

[@Antyelektronika]

@@eesanity Yes. How work autognd, and also all plot... options. thank you for any explanation about this.

[@kavyakm8287]

How to include variable capacitor in the Circuit. Thank you

[@eesanity]

Here is the info about cap in LTspice. ltwiki.org/index.php?title=C_Capacitor It seems there is only one way to make it change over the transient simulation: "There is also a general nonlinear capacitor available. Instead of specifying the capacitance, one writes an expression for the charge. LTspice will compile this expression and symbolically differentiate it with respect to all the variables, finding the partial derivative's that correspond to capacitances. Syntax: Cnnn n1 n2 Q= [ic=] [m=] There is a special variable, x, that means the voltage across the device. Therefore, a 100pF constant capacitance can be written as Cnnn n1 n2 Q=100p*x A capacitance with an abrupt change from 100p to 300p at zero volts can be written as Cnnn n1 n2 Q=x*if(x