344 lines
13 KiB
Plaintext
344 lines
13 KiB
Plaintext
1 to pause/2 to abort
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Hit Space to Abort any other to recieve
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***(201)376-4462***
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***Call it!!***
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$ $
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$ BLUE BOX PLANS! $
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$ --------------- $
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$ $
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$ Edited and Uploaded by: $
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$ $
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$ $
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$$$$$$$$$$$$-=>Lex Luthor<=-$$$$$$$$$$$
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$ $
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$ Written by: $
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$ $
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$ Mr. America from Osuny BBS $
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$ $
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$ Gotten From: The Morgue $
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$ (201)376-4462 $
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$ This file will explain the $
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$ construction, troubleshooting, and $
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$ adjustment of a Blue Box. $
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$ $
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$ $
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$ $
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$ We all know that the touch tone $
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$ frequencies are composed of 2 tones $
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$ (2 different freqs.) so that is the $
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$ reason why we have 2 VCO's (Voltage $
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$ Controlled Oscilators). We'll call $
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$ them VCO#1 and VCO#2. If you have $
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$ noticed VCO#1 and VCO#2 are exactly $
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$ the same type of circuits. That is $
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$ why only 1 was drawn. But remember $
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$ that whatever goes for VCO#1 also $
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$ goes for VCO#2. Both VCO'S are $
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$ composed of a handfull of part. One $
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$ chip, two capacitors, 2 resistors $
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$ and five potentiometers. All of $
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$ this will give you (when properly $
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$ calibrated) one of the freqencies $
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$ necessary (the other one will come $
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$ from VCO#2) for the operation of $
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$ the Blue Box. Both of these freqs. $
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$ will be mixed in the speaker to $
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$ form the required tone. $
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$ $
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$ $
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$ This is one of the most $
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$ sophisticated designs I have ever $
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$ made. Why?. Because other designs $
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$ will drain the battery after 10 $
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$ calls. This design will make them $
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$ last 10 months!!!!!!. But never the $
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$ less, don't forget to put in a $
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$ switch for on and off. Ok let's $
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$ build the two VCO'S and calibrate $
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$ the unit before we get to the $
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$ keyboard construction. $
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$ $
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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< >
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-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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! !
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! VCO CONSTRUCTION !
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! === ============ !
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! !
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! TOOLS REQUIRED !
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! ----- -------- !
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! !
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! 1 ocilliscope(optional but not req) !
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! 1 Freq. counter (REQUIRED) !
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! 1 Volt meter " " " !
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! Electronics tools (Pliers,drll, !
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! screwdrivers, etc.) !
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! !
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-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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< >
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.......................................
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. .
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. ------------- .
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. ! $-PARTS-$ ! .
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. ------------- .
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. .
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. R1 1.5K RESISTOR 5% .
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. R2 1K RESISTOR 5% .
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. C1 .1uf ELECTROLYTIC CAPACITOR 16VDC.
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. C2 .01uf " " (MYLQR)16VDC.
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.IC1 2207 VCO CHIP BY EXAR ELECTRONICS.
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. Remember the above only says .
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. VCO#1 but the same is for VCO#2 .
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. R3-R4 150 OHM RESISTORS 5% .
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. C3-C4 .1 uf ELECTROLITIC CAPACITOR .
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. 10VDC .
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. P1-P10 200K TRIMMER POT - 20 TURNS .
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. DIODES USED IN THE KEYBOARD .
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. ARE 1N914 TYPE (40 OF THEM) & .
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. 13 SWITCHES FOR THE KEYBOARD .
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. SPST MOMENTARY. .
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. SPKR=YOU CAN USE A TELEPHONE SPEAKER.
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. FOR THIS (IT WORKS BEST) BUT .
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. REMEMBER TO TAKE OUT THE DIODE .
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. THAT IS CONNECTED ACCROSS IT. .
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. .
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.......................................
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< >
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***************************************
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* *
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* --------------------- *
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* ! *IMPORTANT NOTES* ! *
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* --------------------- *
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* *
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* 1. DO NOT USE ANYTHING ELSE OTHER *
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* THAN A MYLAR CAPACITOR FOR C2. *
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* 2. PINS 10,9,8 SHOULD BE TIED *
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* TOGETHER AND BE LEFT FLOATING. *
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* 3. ALL RESISTORS SHOULD BE 5%! *
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* NOTHING ELSE! *
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* 4. A TELEPHONE SPEAKER GIVES THE *
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* BEST RESULTS. *
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* *
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***************************************
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< >
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% -------------------- %
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% ! TROUBLE SHOOTING ! %
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% -------------------- %
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% %
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% By now you should have constructed%
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% the two VCO'S on a bread board or %
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% anything that pleases you. %
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% Check for cold solder joints, broken%
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% wires, polarity of the battery, etc.%
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% Before we apply power to the VCO'S %
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% we have to adjust the pots for their%
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% half way travel point. This is done %
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% by turning them 21 turns to the %
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% right and then 10 turns to the left.%
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% Do the same for all ten of them. %
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% %
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%-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-%
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% %
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% Now apply power to the unit check %
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% to see thaty you have power in the %
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% chips by putting the positive lead %
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% of your volt meter on pin 7 and the %
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% negative lead on pin 12. If you do %
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% not have anything there turn off %
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% the unit and RECHECK THE WIRING. %
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% %
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%-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-%
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% %
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% When you get the right voltages %
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% on the chips, connect a diode to a %
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% piece of wire (look at fig. 2 for %
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% the orientation of the diode) from %
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% ground to any pot at point T (look %
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% carefully at the schematic for %
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% point T it is labeled T1-T10 for %
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% all pots). You should be able to %
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% hear a tone, if not disconnect the %
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% lead and place the speaker close to %
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% your ear and if you hear a %
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% chirp-like sound, this means that %
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% the two VCO'S are working if you %
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% don't, it means that either one or %
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% both of the VCO'S are dead. So in %
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% this case it is always good to have %
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% an ocilloscope on hand. %
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% Disconnect the speaker from the %
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% circuit and hook the ocilliscope to %
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% 1 of the leads of the speaker & the %
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% ground from the scope to the ground %
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% of the battery. Connect again the %
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% ground lead with the diode connected%
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% to it from ground to any pot on the %
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% VCO that you are checking and you %
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% should see a triangle wave if not %
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% turn the pot in which you are %
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% applying the ground to until you see%
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% it. When you do see it do the the %
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% same for the other VCO to make sure %
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% it is working. (amplitude is about %
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% 2VAC). When you get the two VCO's %
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% working you are set for the %
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% adjustment of the individuals pots. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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< >
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:::::::::::::::::::::::::::::::::::::::
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: :
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: -------------- :
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: ! ADJUSTMENT ! :
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: -------------- :
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: :
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: DISCONNECT THE SPEAKER FROM THE :
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: CIRCUIT AND CONNECT A FREQ. COUNTER :
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: (THE POSITIVE LEAD OF THE COUNTER TO:
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: ONE OF THE SPEAKERS LEADS THAT :
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: BELONGS TO VCO#1 OR CONNECT IT TO :
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: PIN 14). :
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: :
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:-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-:
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: :
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: CONNECT THE NEGATIVE LEAD TO THE :
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: BATTERY NEGATIVE AND CONNECT THE :
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: JUMPER LEAD WITH THE DIODE FROM :
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: GROUND TO POT NUMBER 1.T1. :
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: ( THE FIRST POT NUMBER 1 POINT T1) :
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: IF YOU GOT IT WORKING YOU SHOULD :
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: HEAR A TONE AND GET A READING ON :
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: THE COUNTER. ADJUST THE POT FOR A :
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: FREQ. OF 1700hz AND CONTINUE DOING :
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: THE SAME FOR POTS 2-5 EXCEPT THAT :
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: THEY GET DIFFERENTS FREQS. WHICH ARE:
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: :
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: $$$$$$$$$$$$$$ :
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: $ $ :
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: $ P1= 1700hz $ :
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: $ P2= 1300hz $ :
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: $ P3= 1100hz $ :
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: $ P4= 900hz $ :
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: $ P5= 1500hz $ :
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: $ $ :
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: $$$$$$$$$$$$$$ :
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: :
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: NOW DISCONNECT THE FREQ. COUNTER :
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: FROM THE SPEAKER LEAD OF VCO#1 OR :
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: FROM PIN 14 (WHICH EVER YOU HAD IT :
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: ATTACHED TO AT THE BEGINNING) AND :
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: CONNECT IT TO THE SPEAKER LEAD OF :
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: VCO#2 OR TO PIN 14 OF VCO#2 AND :
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: MAKE THE SAME ADJUSTMENTS TO P6-10. :
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: :
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: $$$$$$$$$$$$$$$ :
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: $ $ :
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: $ P6= 1100hz $ :
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: $ P7= 700hz $ :
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: $ P8= 900hz $ :
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: $ P9= 2600hz $ :
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: $ P10= 1500hz $ :
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: $ $ :
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: $$$$$$$$$$$$$$$ :
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: :
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: WHEN YOU FINISH DOING ALL OF THE :
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: POTS GO BACK AND RE-CHECK THEM. :
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: :
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:::::::::::::::::::::::::::::::::::::::
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< >
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<!><!><!><!><!><!><!><!><!><!><!><!><!>
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< >
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< ------------ >
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< ! KEYBOARD ! >
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< ------------ >
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< >
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< IF YOU LOOK AT FIG-2 YOU WILL SEE >
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< THAT THE KEYS ARE SIMPLE SWITCHES. >
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< CONNECTED TO A GROUND AND TWO >
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< DIODES ON THE OTHER END. THESE >
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< DIODES ARE USED TO SIMPLIFY THE >
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< CONSTRUCTION OF THE KEYBOARD >
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< BECAUSE OTHERWISE THE DISTRIBUTION >
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< OF THE GROUND SIGNAL FOR BOTH VCO'S >
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< WOULD HAVE BEEN DONE MECHANICALLY. >
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< THE DIODE WILL GO TO VCO#1 AND THE >
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< OTHER WILL GO TO VCO#2. FIG-3 SHOWS >
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< THE ARRANGEMENT OF THE KEYS ON THE >
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< KEYBOARD. >
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< >
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<-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=->
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< >
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< BELOW IS A TABLE THAT WILL HELP >
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< YOU CONNECT THE KEYS TO THE >
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< REQUIRED VCO'S POTS. >
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< >
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<-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=->
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< >
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< (-FIG 2-) >
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< >
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<-----!-----!--------!--------!------->
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< ! ! ! ! >
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< TO ! TO ! FREQ ! FREQ ! KEY >
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< POT ! POT ! OUT: ! OUT: ! >
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< ON ! ON ! ! ! >
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< VCO1! VCO2! ! ! >
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<-----!-----!--------!--------!------->
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< 1 ! 06 ! 1700hz ! 1100hz ! C >
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< 2 ! 10 ! 1300hz ! 1500hz ! 0 >
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< 1 ! 10 ! 1700hz ! 1100hz ! E >
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< 4 ! 07 ! 0900hz ! 0700hz ! 1 >
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< 3 ! 07 ! 1100hz ! 0700hz ! 2 >
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< 3 ! 08 ! 1100hz ! 0900hz ! 3 >
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< 2 ! 07 ! 1300hz ! 0700hz ! 4 >
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< 2 ! 08 ! 1300hz ! 0900hz ! 5 >
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< 2 ! 06 ! 1300hz ! 1100hz ! 6 >
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< 5 ! 07 ! 1500hz ! 0700hz ! 7 >
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< 5 ! 08 ! 1500hz ! 0900hz ! 8 >
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< 5 ! 06 ! 1500hz ! 1100hz ! 9 >
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< - ! 09 ! ------ ! 2600hz ! X >
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< ! ! ! ! >
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<-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=->
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< >
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< REMEMBER THAT IN FIG-2 IT'S THE >
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< SAME FOR EACH KEY EXCEPT THE "X" >
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< KEY, WHICH ONLY TAKES ONE DIODE. >
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< >
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<!><!><!><!><!><!><!><!><!><!><!><!><!>
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< >
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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+ +
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+ AS A FINAL WORD YOU CAN BUILD +
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+ THIS IN ANY TYPE OF ENCLOSURE AND +
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+ SHOULD NEVER BE USED TO MAKE FREE +
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+ CALLS USING THE TELEPHONE LINES, OR +
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+ ANYTHING ELSE ILLEGAL. +
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+ +
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+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
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+ +
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+ If anyone needs other info on the +
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+ use of blue boxes, such as: how to +
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+ get unpublished phone #'s, routing +
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+ codes etc., leave me mail. +
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+
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+ +
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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later,
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$$$$$$$$$$$$-=>Lex Luthor<=-$$$$$$$$$$$
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Remote Sysop
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of
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Plover-Net
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