Elenco Projects 306-511 - Manual (Page 11)

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Project #312
Connecting the power amplifier IC (U4) to the output of the recording
IC (U6), you can make much louder music than project #308.
Turn on the switch (S1), you hear a beep signaling that you may begin
recording. Talk into the microphone up to 5 seconds, and then turn
open the switch (it also beeps after the 5 seconds expires).
Press the press switch (S2) for playback. It plays the recording you
made followed by one of three songs. If you press switch (S2) before
the song is over, music will stop. You may press the press switch
several times to play all three songs.
Power Playback &
Record
OBJECTIVE: To build a circuit that amplifies the recording IC.
OBJECTIVE: To amplify the output of the
recording IC.
Use the circuit in project #312. Turn on the
switch (S1), then press the press switch (S2)
to start the first song. When the music stops,
press the press switch again to hear the
second song. When the second song stops,
press the press switch again, the third song
plays.
Power
Amplified
Playing Music
Project #313
OBJECTIVE: Show variations of project
#312.
Power Light-
Controlled
Music
Project #314
OBJECTIVE: Show variations of project
#312.
Power Touch-
Controlled
Music
Project #315
Use the circuit in project #312. Replace the
press switch (S2) with the photoresistor (RP),
then turn on the switch (S1). Turn the music
on and off by waving your hand over
photoresistor.
Use the circuit in project #312. Place a single
snap on base grid point F1. Replace the
press switch (S2) with the PNP transistor (Q1,
with the arrow on point E2) and then turn on
the slide switch (S1). Turn the music on and
off by touching points F1 & G2 at the same
time. You may need to wet your fingers.