Elenco Computer Inteface for Snap Circuits&reg Manuel d'utilisateur télécharger pdf (Page 46)

Turn on the switch and adjust the variable capacitor (CV) for a

radio station, then adjust the loudness using the adjustable resistor

(RV). Use the same Winscope settings as for project PC12 (AM

radio) to view the waveform and frequency spectrum. The

waveform will be different from that in projects PC12 and PC38,

because those circuits use the power amplifier IC (U4) instead of

the NPN transistor for amplification.

Project #PC39

Transistor AM Radio PC (II)

OBJECTIVE: To show the output of an AM Radio.

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Build the circuit shown. Turn on the slide switch (S1), you hear a

beep signaling that you may begin recording. Talk into the

microphone (X1) up to 8 seconds, and then turn off the slide switch

(it also beeps after the 8 seconds expires).

Press the press switch (S2) for playback. It plays the recording you

made followed by one of three songs. If you press the press switch

before the song is over, the music will stop. You may press the

press switch several times to play all three songs.

Project #PC40

Playback & Record PC

OBJECTIVE: To show the waveforms for music and your voice.

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Elenco Computer Inteface for Snap Circuits&reg Manuel d'utilisateur Page 46