335 lines
13 KiB
Plaintext
335 lines
13 KiB
Plaintext
|
||
|
||
8
|
||
|
||
---------------------------------------
|
||
\ SMACK SPACE TO END /
|
||
\ CTRL-S PAUSE /
|
||
|
||
|
||
THIS BULLETIN HAS BEEN TAKEN FROM THE OSUNY FILES FROM 82/83
|
||
MANY THANKS TO THE WIZ KID FOR HELPING FILL IN THE MISSING
|
||
PORTIONS OF THIS BULLETIN WITH HIS COPY.
|
||
ENJOY,
|
||
SYSOP OF OSUNY-BBS
|
||
914/428-3488
|
||
|
||
THIS BULLETIN WILL DEAL ONLY WITH THE BASIC CONTRUCTION,
|
||
TROUBLESHOOTING AND ADJUSTMENT OF THE BLUE BOX. IF YOU
|
||
WOULD LIKE TO KNOW THE SPECIFIC JOB OF ANY PART IN THE
|
||
CIRCUIT JUST WRITE ME A MSG AND I WILL BE GLAD TO ANS-
|
||
WER IT.
|
||
|
||
|
||
WE ALL KNOW THAT THE TOUCH TONES FREQUENCIES ARE COMPOSED
|
||
OF TWO TONES (TWO DIFFERENT FREQS.) SO THAT IS THE REASON
|
||
WHY WE HAVE 2 VCO'S ( VOLTAGE CONTROLLED OSCILATORS). WE
|
||
WILL CALL THESE VCO#1 AND VCO#2. IF YOU HAVE NOTICED
|
||
VCO#1 AND VCO#2 ARE EXACTLY THE SAME TYPE OF CIRCUITS.
|
||
THAT IS WHY ONLY ONE WAS DRAWN. BUT REMEMBER THAT WHATEVER
|
||
GOES FOR VCO#1 ALSO GOES FOR VCO#2. BOTH VCO'S ARE COMPOSED
|
||
OF A HANDFULL OF PARTS. ONE CHIP TWO CAPACITORS 2 RESISTORS
|
||
AND FIVE POTENTIOMETERS. ALL OF THIS WILL GIVE YOU (WHEN PROPERLY
|
||
CALIBRATED) ONE OF THE FREQS. NECESSARY (THE OTHER ONE WILL
|
||
COME FROM VCO#2) FOR THE OPERATION OF THE BB. BOTH OF THESE
|
||
FREQS. WILL BE MIXED IN THE SPEAKER THUS FORMING THE REQUIRED
|
||
TONE.
|
||
|
||
THIS IS ONE OF THE MOST SOPHISTICATED DESIGNS I HAVE EVER MADE.
|
||
WHY?. BECAUSE OTHER DESIGNS WILL DRAIN THE BATTERY AFTER 10 -
|
||
CALLS! THIS DESIGN WILL MAKE THEM LAST 10 MONTHS!!!!!!. BUT
|
||
NEVER THE LESS DON'T FORGET TO PUT IN A SWITCH FOR ON AND OFF.
|
||
OK LET'S BUILD THE TWO VCO'S AND CALIBRATE THE UNIT BEFORE
|
||
WE GET TO THE KEYBOARD CONTRUCTION.
|
||
|
||
|
||
VCO CONTRUCTION
|
||
=== ===========
|
||
TOOLS REQUIRED
|
||
|
||
1 OCILLISCOPE (RECOMENDED BUT NOT REQUIRED)
|
||
1 FREQ. COUNTER (REQUIRED)
|
||
1 VOLT METER " " "
|
||
ELECTRONICS TOOLS (PLIERS,DRILL, SCREWDRIVERS, ETC)
|
||
|
||
|
||
PARTS
|
||
|
||
R1 1.5K RESISTOR 5%
|
||
R2 1K RESISTOR 5%
|
||
C1 .1UF ELECTROLYTIC CAPACITOR 16VDC
|
||
C2 .01UF ELECTROLYTIC CAPACITOR (MYLAR) 16VDC
|
||
IC1 2207 VCO CHIP BY EXAR ELECTRINICS
|
||
REMEMBER THE ABOVE IT IS ONLY FOR VCO#1 BUT THE SAME GOES FOR
|
||
VCO#2.
|
||
|
||
R3-R4 150 OHM RESISTORS 5%
|
||
C3-C4 .1 UF ELECTROLITIC CAPACITOR 10VDC
|
||
P1-P10 200K TRIMMER POT - 20 TURNS
|
||
DIODES USED IN THE KEYBOARD ARE 1N914 TYPE (40 OF THEM)
|
||
AND 13 SWITCHES FOR THE KEYBOARD SPST. MOMENTARY.
|
||
|
||
SPKR= YOU CAN USE A TELEPHONE SPEAKER FOR THIS(IT WORKS BEST)
|
||
BUT REMEMBER TO TAKE OUT THE DIODE THAT IS CONNECTED
|
||
ACCROSS IT.
|
||
****************************************************************
|
||
IMPORTANT NOTES
|
||
|
||
1 DO NOT USE ANYTHING ELSE THAN A MYLAR CAPACITOR FOR C2
|
||
2 PINS 10,9,8 SHOULD BE TIED TOGETHER AND BE LEFT FLOATING.
|
||
3 ALL RESISTOR SHOULD BE 5%! NOTHING ELSE
|
||
4 A TELEPHONE SPEAKER GIVES THE BEST RESULTS
|
||
*****************************************************************
|
||
|
||
|
||
TROUBLE SHOOTING
|
||
|
||
BY NOW YOU SHOULD HAVE CONSTRUCTED THE TWO VCO'S
|
||
ON A BREAD BOARD OR ANYTHING THAT PLEASES YOU.
|
||
|
||
CHECK FOR COLD SOLDER JOINTS, BROKEN WIRES, POLARITY
|
||
OF THE BATTERY, ETC.........
|
||
|
||
BEFORE WE APPLY POWER TO THE VCO'S WE HAVE TO ADJUST THE POTS
|
||
FOR THEIR HALF WAY TRAVEL POINT. THIS IS DONE BY TURNING THEM
|
||
21 TURNS TO THE RIGHT AND THEN 10 TURNS TO THE LEFT. DO THE
|
||
SAME FOR ALL TEN OF THEM.
|
||
|
||
NOW APPLY POWER TO THE UNIT CHECK TO SEE THAT YOU HAVE POWER
|
||
IN THE CHIPS BY PUTTING THE POSITIVE LEAD OF YOUR VOLT METER
|
||
ON PIN 7 AND THE NEGATIVE LEAD ON PIN 12. IF YOU DON'T HAVE
|
||
ANYTHING THERE TURN OFF THE UNIT ANT RECHECK THE WIRING.
|
||
|
||
WHEN YOU GET THE RIGHT VOLTAGES ON THE CHIPS, CONNECT A
|
||
DIODE TO A PIECE OF WIRE (LOOK AT FIG. 2 FOR THE ORIENTATION
|
||
OF THE DIODE) FROM GROUND TO ANY POT AT POINT T (LOOK CAREFULLY
|
||
AT THE SCHEMATIC FOR POINT T IT IS LABELED T1-T10 FOR ALL POTS)
|
||
YOU SHOLD BE ABLE TO HEAR A TONE, IF NOT DISSCONNECT THE LEAD
|
||
AND PLACE THE SPEAKER CLOSE TO YOUR EAR AND IF YOU HEAR A CHIRP
|
||
LIKE SOUND, THIS MEANS THAT THE TWO VCO'S ARE WORKING IF YOU DON'T,
|
||
IT MEANS THAT EITHER ONE OR BOTH OF THE VCO'S IS DEAD.
|
||
SO IN THIS CASE IT IS ALLWAYS GOOD TO HAVE AN OCILLOSCOPE ON HAND.
|
||
|
||
DISCONNECT THE SPEAKER FROM THE CIRCUIT AND HOOKUP THE OCILLISCOPE
|
||
TO ONE OF THE LEADS OF THE SPEAKER AND THE GROUND FROM THE SCOPE
|
||
TO THE GROUND OF THE BATTERY. CONNECT AGAIN THE GROUND LEAD
|
||
WITH THE DIODE CONNECTED TO IT FROM GROUND TO ANY POT ON THE
|
||
VCO THAT YOU ARE CHECKING AND YOU SHOULD SEE A TRIANGLE WAVE
|
||
IF NOT TURN THE POT IN WICH YOU ARE APPLYING THE GROUND TO
|
||
QUNTIL YOU SEE IT. WHEN YOU DO SEE IT DO THE THE SAME FOR THE
|
||
OTHER VCO TO MAKE SURE IT IS WORKING. (AMPLITUDE IS ABOUT 2VAC)
|
||
|
||
WHEN YOU GET THE TWO VCO'S WORKING YOU ARE SET FOR THE ADJUSTMENT
|
||
OF THE INDIVIDUALS POTS...
|
||
|
||
ADJUSTMENT
|
||
|
||
|
||
DISCONNECT THE SPEAKER FROM THE CIRCUIT AND CONNECT A FREQ.
|
||
COUNTER (THE POSITIVE LEAD OF THE COUNTER TO ONE OF THE SPEAKERS
|
||
LEADS THAT BELONGS TO VCO#1 OR CONNECT IT TO PIN 14).
|
||
|
||
CONNECT THE NEGATIVE LEAD TO THE BATTERY NEGATIVE AND
|
||
CONNECT THE JUMPER LEAD WITH THE DIODE FROM GROUND TO POT NUMBER 1
|
||
T1 .( THE FIRST POT NUMBER 1 POINT T1)
|
||
IF YOU GOT IT WORKING YOU SHOULD HEAR A TONE AND GET A READING ON THE
|
||
COUNTER. ADJUST THE POT FOR A FREQ. OF 1700HZ AND CONTINUE DOING THE
|
||
SAME FOR POTS 2-5 EXCEPT THAT THEY GET DIFFERENTS FREQS.
|
||
|
||
|
||
P1= 1700HZ
|
||
P2= 1300HZ
|
||
P3= 1100HZ
|
||
P4= 900HZ
|
||
P5= 1500HZ
|
||
|
||
NOW DISCONNECT THE FREQ. COUNTER FROM THE SPEAKER LEAD OF VCO#1 OR
|
||
FROM PIN 14 (WHICH EVER YOU HAD IT ATTACHED TO AT THE BEGINNING) AND
|
||
CONNECT IT TO THE SPEAKER LEAD OF VCO#2 OR TO PIN 14 OF VCO#2 AND
|
||
PERFORM THE SAME ADJUSTMENTS TO P6-10.
|
||
|
||
P6= 1100HZ
|
||
P7= 700HZ
|
||
P8= 900HZ
|
||
P9= 2600HZ MAGIC NUMBER!!!!!
|
||
P10= 1500HZ
|
||
|
||
WHEN YOU FINISH DOING ALL OF THE POT GO BACK AND RECHECK THEM
|
||
AGAIN.
|
||
|
||
|
||
KEYBOARD
|
||
IF YOU LOOK AT FIG-2 YOU WILL SEE THAT THE KEYS ARE SIMPLE SWITCHES
|
||
CONNECTED TO GROUND AND TWO DIODES ON THE OTHER END. THESE DIODES
|
||
ARE USED TO SIMPLIFY THE CONSTRUCTION OF THE KEYBOARD BECAUSE OTHERWISE
|
||
THE DISTRIBUTION OF THE GROUND SIGNAL FOR BOTH VCO'S WOULD HAVE BEEN
|
||
DONE MECHANICALLY. ONE DIODE WILL GO TO VCO#1 AND THE OTHER WILL GO TO
|
||
VCO#2. FIG-3 SHOWS THE ARRANGEMENT OF THE KEYS ON THE KEYBOARD.
|
||
|
||
|
||
BELOW IS A TABLE THAT WILL HELP YOU CONNECT
|
||
THE KEYS TO REQUIRED VCO'S POTS.
|
||
|
||
TO TO FREQ OUT FREQ OUT
|
||
KEY POT ON VCO1 POT ON VCO2 PIN 14 VCO1 PIN 14 VCO
|
||
C 1 6 1700 1100
|
||
0 2 10 1300 1500
|
||
E 1 10 1700 1500
|
||
1 4 7 900 700
|
||
2 3 7 1100 700
|
||
3 3 8 1100 900
|
||
4 2 7 1300 700
|
||
5 2 8 1300 900
|
||
6 2 6 1300 1100
|
||
7 5 7 1500 700
|
||
8 5 8 1500 900
|
||
9 5 6 1500 1100
|
||
X - 9 ---- 2600
|
||
|
||
***********************************************************************
|
||
* REMEMBER THAT FIG-2 IT IS THE SAME FOR EACH KEY EXCEPT THE "X" WHICH*
|
||
* ONLY TAKES ONE DIODE. *
|
||
***********************************************************************
|
||
|
||
|
||
AS A FINAL WORD YOU CAN BUILD THIS IN ANY TYPE OF ENCLOSURE
|
||
AND SHOULD NEVER BE USED TO MAKE FREE CALLS USING THE TELEPHONE
|
||
LINES. I HOPE THIS BULLETIN WILL CLEAR ANY QUESTION YOU MAY
|
||
HAD ON THE BLUE BOXES.
|
||
|
||
IF YOU HAVE ANY QUESTION PLEASE
|
||
LEAVE ME A MSG. AND I WILL BE VERY GLAD TO
|
||
ANSWER IT.
|
||
TXS
|
||
MR. AMERICA
|
||
|
||
PS. I WOULD LIKE TO THANK MY KEYBOARD, MY FINGERS, AND ME
|
||
FOR HELPING ME WRITTE THIS BULLETTIN. WITHOUT THEIR HELP
|
||
I WOULD HAVE NEVER FINISH THIS PROJECT.
|
||
|
||
|
||
KEY
|
||
===
|
||
|
||
|
||
FIRST A FEW KEYS TO THE DIAGRAM:
|
||
|
||
CX IS CAPACITOR #X DENOTED BY: ---] ]---
|
||
|
||
|
||
PX IS POT OR VARIABLE RESISTOR #X DENOTED BY :/
|
||
\
|
||
/<--
|
||
\
|
||
RX IS RESISTOR #X DENOTED BY /\/\/\/\
|
||
|
||
|
||
SCHEMATICS
|
||
==========
|
||
|
||
xD THE XR-2207 CHIP IS A VOLTAGE-CONTROLLED OSCILLATOR AND A 14
|
||
PIN DEVICE TH
|
||
US YOU MUST BE VERY CAREFUL WHEN SOLDERING THE PARTS
|
||
TO THIS DEVICE. IT IS A LITTLE DIFICULT TO ACTUALLY DRAW A
|
||
SCHEMATIC ON A 80 CHARACTER SCREN USING LIMITED GRAPHICS BUT WILL
|
||
GIVE IT A TRY.
|
||
TO GND_____________
|
||
]
|
||
___
|
||
C2 C3 ___
|
||
']]' ]
|
||
] ] _____]__9V+
|
||
] ] ] ]
|
||
' ' ' ' ' ' ' ]
|
||
------------------------------- ]
|
||
]7 6 5 4 3 2 1 ] ]
|
||
] < ]
|
||
]8 9 10 11 12 13 14] ]
|
||
------------------------------- ]
|
||
' ' ' ' ' ' ' ]
|
||
] ] ]
|
||
--] ]--------] ] ]
|
||
]C1 R2 ] R1 ]
|
||
GND ______]___/\/\/\/\______]_____/\/\/\/\______]
|
||
|
||
|
||
THIS IS A DIAGRAM OF HOW TO LOCATE THE DIFFERENT PINS ON THE
|
||
CHIP PLEASE NOTICE THAT PIN ONE IS THE CLOSEST TO THE NOTCH ON TOP
|
||
OF THE CHIP. THE FIRST THING WE'LL DO IS TO CONNECT POWER TO THE
|
||
CHIP (REMEMBER THAT YOU NEED TO BUILD TWO OF THESE TO GET A
|
||
COMPLETE SYSTEM) THIS IS ACCOMPLISHED BY CONNECTING THE POSITIVE
|
||
WIRE OF THE BATTERY LEAD TO PIN 1 ONE LEG OF R1 AND R2 IS SOLDER
|
||
TO PIN 11 THE OTHER LEG OF R1 GOES TO PIN 1 OR TO THE POSITIVE OF
|
||
THE BATTERY. THE OTHER LEG OF R2 GOES TO GROUND, C1 GOES BETWEEN
|
||
PIN 10 AND GROUND.
|
||
THE TIMING CAPACITOR OR C2 GOES BETWEEN PINS 2 AND 3 OF THE CHIP
|
||
PINS 8 AND 9 SHOULD BE GROUNDED TO GROUND. PIN 14 IS THE OUT PUT
|
||
AND THIS IS WHERE ONE LEG OF C4 (C3 GOES ON THE OTHER VCO) IN
|
||
SERIES WITH R3(THE SAME GOES FOR THE OTHER VCO) AND TO ONE LEAD
|
||
OF THE SPEAKER.
|
||
|
||
|
||
{ THE TRIMMER POTS P1 TO P10 SHOULD BE GROUPED IN GROUPS OF 5
|
||
POTS EACH. THE WAY YOU GROUP IT IS BY SOLDERING ONE END OF THE
|
||
POT TO EACH OTHER LEAVING THE WIPER AND THE OTHER END FREE.
|
||
|
||
] THIS END GOES TO PIN 6 OF THE CHIP
|
||
]
|
||
_____________]_____________
|
||
/ / / / /
|
||
\ \ \ \ \
|
||
/<- /<- /<- /<- /<-
|
||
\ ] \ ] \ ] \ ] \ ]
|
||
/ ] / ] / ] / ] / ]
|
||
] ] ] ] ]
|
||
] ] ] ] ]
|
||
P1 P2 P3 P4 P5
|
||
|
||
|
||
AND FINALLY THIS IS THE WAY EACH KEY SHOULD BE WIRED.
|
||
|
||
DIODE
|
||
TO PX ------>]-----] THIS IS THE CONTACT OF THE KEY
|
||
]--------- \------
|
||
TO PX ------>]-----] ]
|
||
DIODE ]
|
||
-----
|
||
--- GROUND
|
||
-
|
||
|
||
|
||
|
||
THIS MAY NOT BE THE BEST WAY TO SHOW THE SCHEMATICS BUT
|
||
AT LEAST IT IS SOMETHING.
|
||
|
||
|
||
MR. AMERICA
|
||
|
||
|
||
NOTE: THIS IS FOR INFORMATION ONLY PLEASE DO NOT BREAK ANY LAWS.
|
||
PLEASE DIRECT ANY QUESTIONS TO THE SYSOP OR TO MR. AMERICA.
|
||
|
||
---------------------------------------
|
||
COURTESY OF THE INNER VIEW
|
||
618/632-9330 10MGS 300/1200
|
||
|
||
ENTER (1-18, M=MENU, Q=QUIT) :[
|
||
|
||
o.k
|
||
/e/e
|
||
/e
|
||
|
||
|
||
|
||
[0m
|
||
[Another fine leach from Ice Pic's Gallery]
|
||
Press a key...
|
||
|
||
|
||
[0m
|
||
From Lunatic Labs UnLtd. 415-278-7421
|
||
Press a key...
|
||
***********************************************
|
||
|
||
|
||
|