Elenco PK101 w/ Computer Interface Bedienungsanleitung PDF herunterladen (Seite 24)

Build the circuit and connect the Winscope PC-interface cable as shown. There are 4 resistors and 4

capacitors connected to the 3.3kΩ resistor (we are using the (+) row of holes at the bottom to make

the connections easier) and 2 loose wires connected to the transformer. Connect the transformer to

one resistor and one capacitor at a time, then press the switch.

Use Winscope to view the waveforms in oscilloscope mode and the frequency spectrum using spec-

trum analyzer mode just like in project PC1. You may need to adjust the horizontal (time/frequency)

scale depending on which resistor-capacitor combination you select. If continuing from the previous

experiment then you may want to close the Winscope program and run it again, to reset the settings.

All the combinations are listed below, you don’t need to try all of them but try some and see if there is

a pattern in the frequency or pitch (a term used in music) of the sound. Record a few comments about

the sounds you hear and the waveforms that correspond to them.

10kΩ 33kΩ 100kΩ 1MΩ

0.005µF

0.047µF

10µF

100µF

You will see that the frequency increases when you lower the resistance or capacitance. It also

increases if you lower the inductance, but you don’t have any other inductors you can substitute.

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Elenco PK101 w/ Computer Interface Bedienungsanleitung Seite 24