Elenco Circuit Maker Sound Plus 200 - Manual (Page 65)

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Project #165
Press the press switch (S2) once. The LED lights and music plays for a
while. Press the press switch again and see how long the second song
plays. When the second song stops, press the press switch (S2) again
to play the third song.
LED Music
Project #166 Project #167
Light-Controlled LED
Time Delay
Touch-Controlled LED
Time Delay
Use the circuit in Project #165. Replace the press switch (S2) with the
photoresistor (RP). Turn the LED (D1) on and off by waving your hand over
the photoresistor.
Use the circuit in Project #165. Replace the press switch (S2) with the PNP
transistor (Q1, arrow on U6 and a 1-snap on base grid point F1). Turn the
LED (D1) on and off by touching grid points F1 & G2 at the same time. You
may need to wet your fingers.
The lamp (L4) is used to limit the
current and will not light. The music
may be preceded by a recording, but
the recording quality will not be as
good as when it is played using the
speaker (SP2).
CM-200_Manual_031914.qxp_CM-200_Manual_031914 4/2/14 12:05 PM Page 65