Elenco PK101 w/ Computer Interface Manuel d'utilisateur télécharger pdf (Page 15)

Build the circuit shown. If continuing from the previous experiment then close the Winscope program

and run it again, to reset the settings. Click on the On-Line button to activate and press the switch. The

circuit makes a siren sound that slowly fades away. Try the settings shown here to view it.

The waveform at left shows the

signal just after pressing the

switch, the waveform below

uses the same settings and

shows the waveform just before

the sound stops.You see the

pulses slowly spread out as the

tone of the sound changes.

-15-

+9V

10kΩ

473

470Ω

1MΩ

µµ

Project PC3

OBJECTIVE: To look at the output of a slowly changing circuit.

Siren PC

SPEAKER

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Elenco PK101 w/ Computer Interface Manuel d'utilisateur Page 15