Circuit editor
A 12 V divider across 1 kΩ and 2 kΩ. The midpoint should read 8 V — change a value and watch it move. Nothing here changes over time, though: drop a capacitor in, probe it, and press Run on the scope below.
Live readings shown under each component.
Scope
Select a component on the canvas to probe it.
Press Run to see how this circuit behaves over time.