Elenco Circuit Maker Sound Plus 200 - Manual (Page 73)

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Project #183 Tunable Oscillator
Turn on the slide switch (S1) and
slowly move the adjustable resistor
(RV) control lever until the red LED
(D1) is flashing. The speaker (SP2)
will also make a clicking sound. The
lamp (L4) will not light.
You can remove the speaker if you
don’t like the clicking sound.
Use the Project #183, replace the
capacitor C3 with C2 and the
frequency should be higher.
Replace the 5.1KW resistor (R3) with
the photoresistor (RP) and set RV to
the middle. Now you can and control
the frequency by waving your hand
over the photoresistor (RV).
Project #184
High Low
Oscillator
Project #185 Recording IC
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 5 seconds, and then turn
off the slide switch (it also beeps
after the 5 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, music will stop. You
may press the press switch several
times to play all three songs.
Use the circuit in Project #185, but
replace the microphone (X1) with the
whistle chip (WC). The whistle chip
can be used as a microphone, though
the sound quality is not as good.
Project #186
Whistle
Recording
CM-200_Manual_031914.qxp_CM-200_Manual_031914 4/2/14 12:05 PM Page 73