Elenco Electronics 202 - Manual (Page 28)

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Project #31
OBJECTIVE: To connect two sound IC’s together.
In the circuit, the outputs from the alarm and music IC’s are connected
together. Build the circuit shown and then place the alarm IC (U2)
directly over the music IC (U1), resting on two 1-snaps and a 2-snap.
Turn on the slide switch (S1) and you will hear a siren and music
together while the lamp (L2) varies in brightness.
Sound Mixer
OBJECTIVE: To connect two sound IC’s
together.
OBJECTIVE: To connect two sound IC’s
together.
OBJECTIVE: To connect two sound IC’s
together.
Project #34
Sound Mixer
(IV)
Modify the last circuit by connecting points Y &
Z with a 2-snap (on level 5). The circuit works
the same way but now it sounds like a machine
gun with music.
Project #33
Sound Mixer
(III)
Project #32
Sound Mixer
(II)
Now remove the 2-snap connection between Y
& Z and then make a 2-snap connection
between X & Y (on level 5). The circuit works
the same way but now it sounds like a fire
engine with music. Now remove the 2-snap connection between X
& Y and then make a 2-snap connection
between W & X (on level 5). The circuit works
the same way but now it sounds like an
ambulance with music.