Elenco Circuit Maker Sound Plus 200 - Manual (Page 76)

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Project #191
This circuit uses the variable resistor (RV) as a volume control. Build the
circuit and set RV to the middle position. As the music plays, you can
adjust the volume by moving RV control up or down from the center
position.
Adjustable Volume
Project #192
Adjustable Volume Music
Use the circuit in Project #192 and
place the lamp (L4) across the PNP
transistor (Q1) using a 1-snap (across
base grid locations B8-D8, level 4).
When the recording IC (U6) is playing,
the lamp should be off and then turn on
when the music stops.
Project #193
Adjustable
Volume with
Light
This circuit uses the variable
resistor (RV) as a volume
control. Build the circuit and
set RV to the middle position.
As the music plays, you can
adjust the volume by moving
RV control up or down from
the center position.
CM-200_Manual_031914.qxp_CM-200_Manual_031914 4/2/14 12:05 PM Page 76