Elenco Circuit Maker Sound Plus 200 - Manual (Page 78)

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Project #200 Air Audio Amplifier
Build this audio
amplifier circuit
shown. Set the
adjustable resistor
(RV) control lever to
the bottom position.
Set the slide switch
(S1) on and blow
into the microphone
(X1). You should
hear static on the
speaker (SP2) and
the LED (D1) may
flicker.
Use the circuit in Project #200 and swap the location
of the speaker (SP2) and the 3-snap at D6-F6. Move
the red LED (D1) so it is across base grid locations D6-
D8 (+ towards D6). You should hear noise on the
speaker and the LED may flicker.
Project #201
Red LED Audio Amplifier
Use the circuit in Project #201, replace the microphone
(X1) with the whistle chip (WC). Blow into the whistle
chip. You should hear static on the speaker (SP2) and
the LED (D1) may flicker. Notice how sensitive the
whistle chip is compared to the microphone.
Project #202
Whistle Chip Audio Amplifier
Project #203
Build the circuit shown and turn on the slide switch (S1). Press the press
switch (S2) to play a recording followed by a song. If you press the press
switch before the song is over, music will stop. Adjust the amount of light
on the photoresistor (RP) to change the volume and alter the tone. Wave
your fingers over the photoresistor for some cool sound effects.
Photo Powered Music
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CM-200_Manual_031914.qxp_CM-200_Manual_031914 4/2/14 12:05 PM Page 78