5J30.10 LRC Circuits: LRC Ringing
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Photos Show the Demonstration at the University of Texas at Austin.
Instructions / Notes:
- This LRC Ring Demo consist of:
- Choice of no resistor in the circuit - or - 2 different resistors, which show critical dampening versus over dampening,
- Plus a choice of a default 2.6 microfarad capicitor - or - a combination of a 2.6 uF + a 4.5 uF capacitor to show the effect on the frequency
- Digital oscilloscope with a VGA output to the classroom A/V system
- If other demos requested in addition to the LRC Ringing, then it's best to plug this one in first and turn on the Oscilloscope.
- The oscilloscope takes about 1 full minute to boot up, which provides time to connect the provided VGA cable to the lectern A/V system.
- After the full boot up - "press" the small display button to clear the screen.
- Last but not least - "press" - the "Single" button on the top right side of the oscilloscope, before leaving the classroom.
- Note: Someone in the backroom should have already set the (H)orizontal setting to 200.0 ms per division.
To perform the demo in its default set-up mode, the faculty member needs only to:
- Push down the red momentary button, (shown on the circuit board in the third photo below).
- Reset the oscilloscope by pushing the "Single" button for a second or third data run.
- Be aware that the demo cart is plugged into the Lectern A/V Laptop VGA cable.
Screen shot showing the LRC Ring Demo using two capacitors with no resistor in the circuit.
Close up of the circuit used at the University of Texas at Austin.
Last Updated 09/15 - University of Texas at Austin Physics Dept.
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