354 lines
12 KiB
Plaintext
354 lines
12 KiB
Plaintext
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(>---------------------------------------------------------------------------<)
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The LOD/H Technical Journal: File #6 of 12
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+--------------------------------+
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| Building Your Own Blue Box |
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+--------------------------------+
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|By|
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|Jester Sluggo|
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|Released: Nov. 27, 1986 |
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+--------------------------------+
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This Blue Box is based on the Exar 2207 Voltage Controlled Oscillator.
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There are other ways to build Blue Boxes, some being better and some not as
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good, but I chose to do it this way. My reason for doing so: because at the
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time I started this project, about the only schematic available on BBS's was
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the one written by Mr. America and Nickie Halflinger. Those plans soon (in
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about 90 seconds) became very vague in their context with a couple in-
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consistencies, but I decided to "rough it out" using those plans (based on the
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Exar 2207 VCO) and build the Blue Box using that as my guide. During the
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construction of the Blue Box, I decided to type-up a "more complete and clear"
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set of Blue Box schematics than the file that I based mine on, in order to help
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others who may be trying/thinking of building a Blue Box. I hope these help.
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Note: You should get a copy of the Mr. America/Nickie Halflinger Blue Box
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plans. Those plans may be of help to anyone who may have difficulty
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understanding these plans. Also, these plans currently do not support CCITT.
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+---------------------------------+
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| Why should I build a Blue Box ? |
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+---------------------------------+
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Many of you may have that question, and here's my answer. Blue Boxing was
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the origin of phreaking (excluding whistling). Without the advent of Blue
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Boxes, I feel that some of the advances in the telecommunications industry
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would've taken longer to develop (The need to stop the phone phreaks forced
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AT+T Bell Laboratories to "step up" their development to stop those thieves!).
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There is no harm in building a Blue Box (except the knowledge you will
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gain in the field of electronics). Although there are software programs (Soft
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Blue Boxes) available for many micro's that will produce the Blue Box
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Multi-Frequency (MF) tones, they are not as portable as an actual Blue Box (you
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can't carry your computer to a telephone, so you must use it from home which
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could possibly lead to danger).
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Many phreaks are announcing the end of the Blue Box Era, but due to
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discoveries I have made (even on ESS 1A and possibly ESS 5), I do not believe
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this to be true. Although many people consider Blue Boxing "a pain in the
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ass", I consider Blue Boxing to be "phreaking in its' purest form". There is
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much to learn on the current fone network that has not been written about, and
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Blue Boxes are necessary for some of these discoveries. The gift of free fone
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calls tends to be a bonus.
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Note: Blue Boxes also make great Christmas gifts!
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+---------------------------------------+
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| Items needed to construct a Blue Box. |
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+---------------------------------------+
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Here is the list of items you will need and where you can get them. It
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may be a good idea to gather some of the key parts (the chips, and especially
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the potentiometers, they took about 6 months to back order through Digi-key. A
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whole 6 fucking months!) before you start this project. Also, basic
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electronics tools will be necessary, and you might want to test the circuit on
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a bread board, then wire-wrap the final project. Also, you will need a box of
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some sort to put it in (like the blue plastic kind at Radio Shack that cost
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around $5.00).
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Note: An oscilliscope should be used when tuning in the
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potentiometers because the Bell system allows
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only a 7-10% tolerance in the precision of the
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frequencies.
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Qty. ItemPart No.Place
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---------------------------------------------------
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1 | 4 x 4 Keypad|| Digi-Key
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6 | Inverter Chip| 74C04|
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32 | Potentiometer||
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1 | 4-16 Converter Chip| 74LS154|
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1 | 16 Key Decoder| 74C922|
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2 | 2207 VCO| XR2207CP | Exar Corp.
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3 | .01 uf Capacitor | 272-1051 | Radio Shack
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5 | .1 uf Capacitor | 272-135| Radio Shack
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2 | 1.5K Ohn Resistor || Radio Shack
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2 | 1.0K Ohm Resistor || Radio Shack
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1 | Speaker|| From an old Autovon fone.
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1 | 9 Volt Battery|| Anywhere
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The resistors should be a +/- 5% tolerance.
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The speaker can be from a regular telephone (mine just happened to be from
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an old Autovon phone). But make sure that you remove the diode.
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The Potentiometers should have a 100K Ohm range (but you may want to make
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the calculations yourself to double check).
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The 9-volt battery can be obtained for free if you use your Radio Shack
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Free Battery Club card.
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The Exar 2207 VCO can be found if you call the Exar Corp. located in
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Sunnyvale, California. Call them, and tell them the state you live in, and
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they'll give the name and phone number to the distributor that is located
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closest to you. The 2207 will vary from about $3.00 for the silicon-grade
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(which is the one you'll want to use) to about $12.00 for the high-grade
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Military chip.
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Note: When you call Exar, you may want to ask them to send you the
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spec-sheets that gives greater detail as to the operation and construction of
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the chip.
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+-------------------+
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| Schematic Diagram |
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+-------------------+
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+--------------++-------------+
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| 1 2 3 A || Figure #1 |
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| 4 5 6 B |+-------------+
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| 7 8 9 C || Logic Side |
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| * 0 # D |+-------------+
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++-+-+-+-+-+-+-+
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1 | 3 | 5 | 7 |(VCC)
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| 2 | 4 | 6 | 8(+5 Volts) +----+
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| | | < u | | |[+]| _|_
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+--+-+-+-+-+-+-+-+----++--+----------+---+
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| 2 | 11| 10| 7 | || 147 |
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(.01C) | | 3 | 4 | 8 | 1 12+------+1|
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+--||---+513+------+2 (*74C04*) |
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_|_||||
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\_/GND |(*74C922*)|+-----------------+
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+--||-+6|
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|(.1C)||
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_|_ ||
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\_/GND | 9 17 16 15 14 18|
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+--+--+--+--+--+---+--+
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_|_ A B C D |
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GND\_/ | | | | [+] (VCC)[+] (VCC)
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| | | |(+5 volts) | (+5 volts)
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-------+--+--+--+------------------+-----------------
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|23 22 21 202418+-+
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+-----+12| +--+
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||(*74LS154*)19+-+ _|_
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_|_ || \_/
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\_/GND | 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 17 | GND
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+--+--+--+--+--+--+--+--+--+-+--+--+--+--+--+--+----+
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
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| (Connects)
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| +---------->
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+------------------------+ | (Figure 2)
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|+--++-------+
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+--+-------+--+-------+---+
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| 3--|>o--4 5--|>o--6 |
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| (Invtr.) (Invtr.) |
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+---------------+7|
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_|_|(*74C04*)|
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GND\_/ (VCC) [+]--+14|
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(+5 volts) ||
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+-------------------------+
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+-------------+_
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| Figure #2 |/ |
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+---+-------------+----++----------------+ |
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| Tone Generation Side |_|_| | SPKR
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+----------------------+GND\_/ +---+--+---+ |
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| |\_|
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+-------+| | ||
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|_|_| +--+14|
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|\_/GND|| (Repeat of) |
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----- (.1C)|| (Circuit) |
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-----|||
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||| (*XR2207CP*) |
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|+-----------------+ | +--+6|
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[+]-----+-------+114+--+ | +---------------+
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(VCC)||+--------------------+
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(+9 Volts) +----+2||
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| |12+---------------------+|
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(.01C) ----- ||_|_ |
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----- | (*XR2207CP*) |\_/GND |
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| ||1.5K Ohms|
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+----+311+---+---\/\Rx/\/---+--+|
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|| || _|_ |
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|| +---\/\Rx/\/---+ \_/GND |
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||1.0K Ohms|
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|10+----+|
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+-------------+69+----+---+|
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||8+----+ ||
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|||----- (.1C)|
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|+-----------------+-----|
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+---------+_|_+----------+
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|| Pot.GND\_/ Pot. ||
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|\/\/\/\/--+-----------------------\/\/\/\/|
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|1400 Hz. |1600 Hz.|
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+---------+|+----------+
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|| Pot. |Pot. ||
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|\/\/\/\/--+----------------+------\/\/\/\/|
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|1500 Hz. ||900 Hz.|
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|14 more||14 More|
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| Potentiometers ||Potentiometers |
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|in this||in this|
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| area left out ||area left out|
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| for simplicity ||for simplicity |
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(Connects) |
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<-------------+
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(Figure 1)
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+-------------------------+
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| Multiplex Keypad System |
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+-------------------------+
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First, the multiplex pattern used in the 4x4 keypad layout. I suggest that
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keys 0-9 be used as the Blue Box's 0-9 keys, and then you can assign A-D, *, #
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keys to your comfort (ie. * = Kp, # = St, D = 2600, and A-C as Kp1, Kp2 or
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however you want).
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Note: On your 2600 Hz. key (The D key in example above)
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it may be a good idea to tune in a second
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potentiometer to 3700 Hz. (Pink Noise).
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KeypadKey Assignments Multiplex Pattern
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+---------+ +-------------+ +------------+
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| 1 2 3 A | | 1 2 3 4 | | 1 2 3 A |----Y1=8 X1=3
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| 4 5 6 B | | 5 6 7 8 | | 4 5 6 B |----Y2=1 X2=5
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| 7 8 9 C | | 9 10 11 12 | | 7 8 9 C |----Y3=2 X3=6
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| * 0 # D | | 13 14 15 16 | | * 0 # D |----Y4=4 X4=7
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+---------+ +-------------+ +------------+
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X1 X2 X3 X4
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+----------------------+
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| Blue Box Frequencies |
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+----------------------+
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This section is taken directly from Mark Tabas's "Better Homes and Blue
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Boxing" file Part 1.
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Frequenies (Hz) Domestic Int'l
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----------------------------------
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700+90011
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700+110022
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900+110033
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700+130044
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900+130055
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1100+130066
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700+150077
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900+150088
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1100+150099
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1300+150000
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700+1700ST3pCode 11
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900+1700STpCode 12
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1100+1700KPKP1
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1300+1700ST2pKP2
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1500+1700STST
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2600+3700*Trunking Frequency*
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Note: For any further information about the uses or duration of the
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frequencies, read the Mark Tabas files.
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+----------------+
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| Schematic Help |
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+----------------+
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This is the Key to the diagrams in the schematic. I hope that they help
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more then they might hurt.
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_|_
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\_/GND is the Ground symbol
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---| |-- is the Capacitor symbol
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| |(.1C) stands for a .1 uf Capacitor
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(.01C) stands for a .01 uf Capacitor
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-----
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-----is another Capacitor symbol
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--\/\Rx/\/-- is the Resistor symbol (The 1.5K Ohm and 1.0K Ohm
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Resistors are at +/- 5% )
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---+
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\/\/\/\/-- is the Potentiometer symbol (The frequncies I supplied
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above are just examples.)
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--|>o--is the Inverter symbol
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+------------+
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| Conclusion |
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+------------+
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This is just one way to build a Blue Box. If you choose this way, then I
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hope this file is adequate enough to aid you in the construction. Although
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these are not the best plans, they do work. This file does not tell you how to
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use it or what to do once it's built. For that information I mention that you
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read Mark Tabas's "Better Homes and Blue Boxing" files, or any other files/BBS
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subboards that deal with that realm.
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If you need help, I sluggest (thanks for that one Taran) that you ask a
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close friend, possibly an electronics teacher, or a phreak friend to help you.
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Also, if you need help or have questions or comments about this file, you can
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address them to me. I can be contacted through the LOD/H Technical Journal
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Staff account on the boards listed in the Intro, or on the few boards I call.
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+-------------+
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! Credentials !
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+-------------+
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At last, this article would not be possible without the help of the
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following people/places whom contributed to it in one way or another (it may
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not be apparent to them, but every minute bit helps).
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Deserted Surfer (Who helped immensly from Day 1 of this project.)
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(Without his help this file would not be.)
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Mark Tabas(For the BHBB files which inspired my interests.)
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Nickie Halflinger (For the original Blue Box plans I used.)
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Mr. America(For the original Blue Box plans I used.)
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Lex Luthor
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Cheap Shades
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Exar Corp.
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Lastly, I would like to thank the United States government for furnishing
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federal grants to this project. Without their financial help, I would have had
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to dish out the money from my own pocket (Approximately $80.00. Egads!)
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Jester Sluggo
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(>---------------------------------------------------------------------------<)
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///////////////////////////////////////////////////////
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//The PIRATES' HOLLOW//
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//415-236-2371//
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//over 12 Megs of Elite Text Files//
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//ROR-ALUCARD//
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//Sysop: Doctor Murdock//
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// C0-Sysops: That One, Sir Death, Sid Gnarly & Finn //
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////
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// "The Gates of Hell are open night and day;//
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//Smooth is the Descent, and Easy is the way.." //
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///////////////////////////////////////////////////////
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Downloaded From P-80 International Information Systems 304-744-2253
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