Elenco Snap Circuits® Deluxe Sound & Light Combo - Manual (Page 68)

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Project 113
Night Blinker
Project 112
Day Blinker
Night Light Show
Project 115
Daylight
Light Show
Project 114
MP3
player
LED Attachments
Build the circuit as shown and turn
on the switch (S1). The color LED
(D8) is on when there is light on the
phototransistor (Q4). Shine light on
or cover the phototransistor to turn
the color LED on or off.
Build the circuit as shown and turn
on the switch (S1). The color LED
(D8) is off when there is light on the
phototransistor (Q4). Cover or shine
light on the phototransistor to turn
the color LED on or off.
If the color LED comes on too easily,
reduce the sensitivity by replacing
the 5.1kW resistor (R3) with the
100kW resistor (R5).
Build the circuit as shown.
Connect a music device (not
included) to the color organ
(U22) as shown, and start
music on it. Place one of the
LED attachments over the
light on the color organ. Turn
on the switch (S1), then cover
the phototransistor (Q4) to
see a light show. Adjust the
volume on your music device
for best light effects.
Replace the 100kW resistor
(R5) with the 5.1kW resistor
(R3) to make the light brighter.
Use the preceding circuit, but
swap the locations of the
phototransistor (Q4) and the
100kW resistor (R5), put the
“+” side of Q4 towards the
NPN transistor (Q2). Now
covering the phototransistor
turns off the light show.
SCC-350_Manual_Part_B.qxp 7/25/14 2:05 PM Page 12