LRC Circuits

A circuit comprising a resistor, inductor, and capacitor is visible on a large roll-out cart. The values of the circuit components are variable so that students may see the effect of changing them. The circuit is driven by a waveform generator which can generate sine, square, and triangle waves at adjustable amplitudes and frequencies. The oscilloscope display can be projected onto the lecture hall wall or screen.

large demo area between A5 and A6

To set this demo up, use a function generator with a square wave input. This input can be seen in Channel 1 of the scope using a BNC. Then, measure the voltage drop across each of the components using the circuit box (it consists of four instrumentation amplifiers that measure the voltage difference between leads - see INA114 for details). The voltage drop can then be seen from the outputs of the circuit box through the scope. To show in lecture hall, use a camera with HDMI and connect to the AV system. Note that there's no feedback suppression, so system volume needs to be turned down. Also note that some adaptors may be needed since it's likely mini hdmi and m-m. I use a HDMI splitter as the intermediate.

Note: The inputs are at the bottom and the outputs at the top BNCs. The third and fourth output BNCs correspond to the fourth and third input ones, respectively.

PIRA DCS 5L20.00