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|| A Real Functioning PEARL BOX Schematic ||
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|| Written, Tested, and Used ||
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|| by Dispater ||
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|| July 1, 1989 ||
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Introduction: After reading the earlier renditions of schematics for the Pearl
Box, I decided that there was an easier and cheaper way of doing
the same thing with an IC and parts you probably have just
laying around the house.
What Is A Pearl Box and Why Do I Want One?
A Pearl Box is a tone generating device that is used to make a wide range
of single tones. Therefore, it would be very easy to modify this basic
design to make a Blue Box by making 2 Pearl Boxes and joining them
together in some fashion.
A Pearl Box can be used to create any tone you wish that other boxes may
not. It also has a tone sweep option that can be used for numerous things
like detecting different types of phone tapping devices.
Parts List:
CD4049 RCA integrated circuit
.1 uF disk capacitor
1 uF 16V electrolitic capacitor
1K resistor
10M resistor
1meg pot
1N914 diode
Some SPST momentary push-button switches
1 SPDT toggle switch
9 Volt battery & clip
and miscellaneous stuff you should have laying around the house.
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