Elenco Electronics 202 - Manual (Page 118)

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Project #276
OBJECTIVE: To show how the music IC can be used.
Turn on the slide switch (S1), you hear sound from the speaker (SP)
while the lamp (L2) and LED (D1) are bright. After the sound stops,
only the LED will remain on. Press the press switch (S2) to restart the
sound.
Sound & Lights
Project #277
OBJECTIVE: To connect the music IC to a timer circuit.
Turn on the slide switch (S1) and bulb (L2) lights. Press the press
switch (S2) and the music IC (U1) plays and stops. The music will not
play as long as Q2 is on. Press the press switch; transistors Q1, Q2
and the bulb turn off as the LED (D1) lights. As the song plays once
at full volume, the LED slowly turns off.
Replace capacitor C5 with different values and see how it affects the
circuit.
Music with Timer