Interactive simulation
Gain against frequency on a log axis — where a filter actually stops working.
The orange probe walks the curve from 10 Hz to 1 MHz over and over: watch the source's sine tighten up and the Vout bar collapse as the gain leaves the passband. L only bites in the RLC mode — the two RC filters ignore that slider completely.
What you can change
Boost converterCoil, switch and diode turning 12 V into 24 V — and the input current the load never sees.
Buck converterSwitch, coil and diode making 12 V into 5 V — watch the ripple and the CCM edge.
Class-AB crossoverThe notch you hear at every zero crossing, and the bias current that closes it.
Comparator & hysteresisWhy a noisy signal needs a Schmitt trigger — watch the chatter meter.
Current mirrorOne transistor sets the current, its twin copies it — until the load runs out of headroom.
DC motor start-upSwitch it on with the shaft stopped and nothing but the winding resistance limits the current.
Diode I–V & load lineWhere the diode curve meets the resistor's load line — that's your operating point.
H-bridge motor driverForward, reverse, brake, coast — watch the current thread the bridge.