Elenco Snap Circuits® Deluxe Sound & Light Combo - Manual (Page 103)

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Project 201 Light, Sound, & Motion
Use the preceding circuit, but replace the 470mF capacitor
(C5) with the 1mF capacitor (C7). The color LED (D8) is
brighter now, but may not be changing colors.
Let’s add motion to the preceding circuit. Modify the circuit to match this
one. Turn off the left slide switch (S1) and turn on the right slide switch.
Lay the speaker (SP2) down on unused 2-snap and 6-snap wires (to
elevate it slightly off the table), be sure it is laying flat, and place the sound
energy demonstration container over it (the container should have been
assembled as per instructions on page 4). Pour some salt, glitter, small
foam or candy balls of 0.1 inch diameter or less (not included) or similar
into the container, but not enough to cover the bottom.
Press the keys on the keyboard to make sound and light the color LED
(D8). For some keys the salt/glitter/balls will vibrate and bounce or dance
around in the container, find the key that gives the best effects. Most keys
will create little or no vibration. For the best key, adjust the TUNE knob on
the keyboard for best effects. The color LED will not be very bright.
Now turn on the left slide switch and wave your hand over the photoresistor
(RP), to change how much light shines into it. The sound changes as your
hand adjusts the light, and the color LED will light if there is bright light on
the photoresistor. At some hand positions the salt/glitter/balls will vibrate
and bounce or dance around in the container; find the hand position that
gives the best effects. Press some keyboard keys to combine their sounds
with the photoresistor sound. Try moving to an area with more or less light,
and wave your hand over the photoresistor again.
Experiment with different materials in the container and see which give
the most impressive results. Our engineers found that 0.1” round non
pareils (decorative candy sprinkles) work best.
Try lifting the container a little higher above the speaker with your hands,
and see how much this affects the bounce height; see where you get the
best effects. Try it at best key or RV setting, and at other keys/settings.
Also, placing the speaker directly on the table (without the 3-snap and 6-
snap under it) should reduce the vibration a little, but you can try it to see
the difference.
Add the 0.1mF capacitor (C2) over the keyboard (U26) at base grid
locations D4-F4 (on level 3) and see how the circuit changed, especially
when pressing the green keys.
Project 202
Brighter Light, Sound, & Motion
Lay the speaker on the
extra 3-snap and 6-snap
wires, to elevate it. Be
sure speaker lays flat.
Place the sound energy
demonstration container over
the speaker. Pour salt, glitter,
or small foam/candy balls (not
included) into the container,
but do not cover the bottom.
SCC-350_Manual_Part_B.qxp 7/25/14 2:06 PM Page 47