Elenco Circuit Maker Sound Plus 200 - Manual (Page 61)

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Project #156 Blink & Beep
Set the adjustable resistor (RV) to the far left
and turn on the slide switch (S1). The LED
(D1) lights and the speaker (SP2) sounds
once per second. Adjusting the adjustable
resistor to the right increases the rate.
Project #157
Blink & Beep (II)
Replace the 10mF capacitor (C3) with the
100mF capacitor (C4). When you turn on the
slide switch (S1), LED (D1) will light about
every 10 seconds. The speaker (SP2) clicks
as the light blinks.
Project #155
Static Space
Sounds
Project #153 Transistor Power
Set the adjustable resistor (RV)
to the top position, turn the slide
switch (S1) on and the speaker
(SP2) sounds. Slowly adjust the
adjustable resistor down; the
loudness decreases and the
time the sound is on is longer.
Adjusting the lever down turns
the NPN transistor (Q1) off,
lowering the voltage on space
war IC (U3).
Project #154
Transistor
Power (II)
Change the sound by modifying the
preceding circuit. Move the 2-snap
across A & B to B & C. Operate the
circuit the same as Project #153.
Modify the previous circuit by placing
2-snaps across A & B, C & D and a
3-snap across B & D.
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CM-200_Manual_031914.qxp_CM-200_Manual_031914 4/2/14 12:04 PM Page 61