109 lines
4.8 KiB
Plaintext
109 lines
4.8 KiB
Plaintext
==Phrack Inc.==
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Volume Three, Issue 28, File #5 of 12
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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
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for the Pearl Box, I decided that there was an
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easier and cheaper way of doing the same thing
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with an IC and parts you probably have just laying
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around the house.
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What Is A Pearl Box and Why Do I Want One?
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A Pearl Box is a tone generating device that is used to make
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a wide range of single tones. Therefore, it would be very
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easy to modify this basic design to make a Blue Box by
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making 2 Pearl Boxes and joining them together in some
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fashion.
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A Pearl Box can be used to create any tone you wish that
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other boxes may not. It also has a tone sweep option that
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can be used for numerous things like detecting different
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types of phone tapping devices.
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Parts List:
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CD4049 RCA integrated circuit
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.1 uF disk capacitor
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1 uF 16V electrolitic capacitor
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1K resistor
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10M resistor
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1meg pot
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1N914 diode
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Some SPST momentary push-button switches
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1 SPDT toggle switch
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9 Volt battery & clip
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and miscellaneous stuff you should have laying around the house.
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State-of-the-Art-Text Schematic:
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+ 16V 1uF -
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_______________________________||_____
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| ! ! || | _
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| _______________________ |__________| |/| 8ohms
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____|__|_____:__|__:__|_ | __________| | |
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| 9 10 11 12 13 14 15 16 | | | |_|\|
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| CD4049UBE | | |
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|_1__2__3__4__5__6__7__8_| : | _
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| | |__| |__| | |____________________|_________[-]
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| | ! ! : [b]
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| |__________________________| [a]
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| : : | [t]
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| ! 1N914 ! ! [t]
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|___________|/|_____________________________________[+]
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: |\| : :
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| 10M | |
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|___/\/\/\__| |
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|_____||____| | <-- These 2 wires to the center pole
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|| | | of switch.
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.1uF 50V | |
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_______________________| |_____________________________
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| ___[Toggle Switch]____________ |
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| | | ___ |
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| | | o o |
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| | | /\/\/\___| |__|
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|_/\/\/\____/\/\/\ | | ^ |
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1K ^ | |____| ___ |
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|___| | o o |
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| /\/\/\___| |__|
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(pot side) (push-button | ^
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side) |__|
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Explanation:
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The 2 wires that lead from the main part of the circuit
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should be connected to the center poles on the toggle
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switch. Put the 2 wires to the pot on one side and the 2
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wires going to the push-buttons to the other side. That way
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you can switch between tone sweep and the favorite tones you
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like (the push-button side).
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To keep tones that you want to use frequently like 1850 Hz
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then all you have to do is put in a variable resistor and
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adjust it to where you have the correct tone, then just put
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a push-button switch on the line. You can link them
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together in a chain, etc. There are many other good
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modifications to make to the box so have fun and be smart.
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--Dispater
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\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\?///////////////////////////////////////
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