Elenco PK101 w/ Computer Interface - Manual (Page 7)

SPEAKER
+9V
S
P
10k
Ω
3.3k
Ω
473
-7-
Project # Description Page #
PC1 Pitch 7
PC2 Speaker Microphone 13
PC3 Siren PC 15
PC4 Space Gun PC 16
Project # Description Page #
PC5 Electronic Noisemaker PC 18
PC6 Noisy Blinker PC 21
PC7 Electronic Sound PC 23
PC8 Electronic Rain PC 25
PROJECT LISTINGS
Project PC1
OBJECTIVE: To look at the output signal from a transistor oscillator while
changing the pitch of the sound.
Pitch
You will now be introduced to the Winscope features, and thereby become familiar with oscilloscopes
and spectrum analyzers, and see some of the most important concepts in electronics. It is recom-
mended that you already be familiar with the parts and assembly methods from the other manual.
Build the circuit shown and connect the PC-interface cable to the microphone input on your computer.
Press the switch and vary the variable resistor. The frequency or pitch of the sound is changed. Run
the Winscope software and be sure your microphone input is configured properly, as described earli-
er. Winscope will be used to view the electrical signal to the speaker.
DISC CAPACITOR
473 marking = .047
µ
F