Two individual series circuits are wired on a common panel so they may be used to illustrate the charge and discharge currents in a capacitor or the growth of current in an inductive circuit. The circuits are driven by a square wave generator so that their responses may be continuously displayed on an oscilloscope.
R=10,000 ohms, C=0.005uf for RC circuit
R=500 ohms, L=30 mh for RL circuit