I second this view with this old full circuit simulator: https://www.falstad.com/circuit/ https://www.falstad.com/circuit/ The default example here is the LCR-

I second this view with this old full circuit simulator: https://www.falstad.com/circuit/ https://www.falstad.com/circuit/ The default example here is the LCR-circuit which to understand mathematically requires a bit of work https://en.wikipedia.org/wiki/RLC_circuit https://en.wikipedia.org/wiki/RLC_circuit