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APPARATUS

Set the switch to charge the capacitor.  Arm the scope (single sequence button).  Flip the switch to discharge the capacitor through the LRC series circuit.  The oscilloscope is set to display V_R and V_C.

This demo is identical to the analog scope version except that the circuit uses different components, in particular a larger capacitor value so the capacitor doesn't discharge through the smaller input impedance of the DSO before the switch is thrown.  To vary the capacitance, connect a second 0.5 uF capacitor in parallel with the first.

              V_c on CH1 is in yellow and V_R on CH2 is in blue.

NOTES

Make sure the switch contacts are clean.

The key switches have more contact bounce, so the traces are cleaner when using the dpdt switches.

To clear the display, select "single sequence" then "force trigger".

Adjust the camera aperture so the colors of the traces are apparent on the projected image.