Elenco Electronics 202 - Manual (Page 45)

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Project #79
OBJECTIVE: Build a circuit that flashes light and plays sounds.
Turn the slide switch (S1) on and the lamp (L2) and LED (D1) starts
flashing. You hear two different tones driving the LED and lamp. IC’s
can be connected to control many different devices at the same time.
Flash & Tone
Project #77
Space War Flicker LED
OBJECTIVE: To
flash an LED
using the space
war IC.
Project #78
Human Space War
OBJECTIVE: To use your body
to control the space war IC.
Wet your fingers with some water
or saliva and touch them across
points A and B several times to
hear some space war sounds.
Press the press switch (S2) to
hear more sounds at the same
time.
This circuit uses your body to
conduct electricity and turn on the
circuit. Wetting your fingers
improves the connection between
the metal and your finger.
Build the circuit
shown on the left.
The circuit uses
the alarm IC (U2)
and space war IC
(U3) to flash the
LED (D1). Turn
the slide switch
(S1) on and the
LED starts
flashing.