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- /\ PRESENTED
- < , , > BY
- =()= EXPLORER
- CAT 033
-
- =*=*= WHITE BOX / SILVER BOX =*=*=
-
- THESE ARE THE INSTRUCTIONS ON HOW TO BUILD A WHITE BOX/SILVER BOX. MOST OF TH
- PARTS REQUIRED CAN BE FOUND AT YOUR NEAREST RADIO SHACK. THE ONLY REAL IMPORTAN
- PART REQUIRED NOT SOLD AT RADIO SHACK IS THE KEYPAD. THIS CAN BE PICKED UP AT
- ANY ELECTRONIC STORE SUCH AS CARDINAL ELECTRONICS. THESE INSTRUCTIONS ARE FOR A
- 12 BUTTON KEYPAD. A TOGGLE SWITCH IS ADDED FOR THE SILVER BOX APPLICATION. IF
- YOU HAVE A 16 BUTTON KEYPAD THEN THE TOGGLE SWITCH ISN'T NEEDED.
- THE TONES MADE BY A TOUCH TONE TELEPHONE ARE NOT SINGLE TONES. THEY ARE A
- COMBINATION OF TWO TONES, MAKING "DTMF" (DUAL TONE MULTI-FREQUENCY). THE NORMAL
- TELEPHONE DIALS 12 DIFFERENT SIGNALS BUT IS CAPABLE OF DIALING 16 DIFFERENT
- SIGNALS.
- THE POWER REQUIRED BY A KEYPAD IS ABOUT 25 VOLTS, BUT THEY WILL WORK WITH AS
- LITTLE AS 15, THEREBY ALLOWING THE USE OF TWO 9 VOLT BATTERIES. THIS DESIGN
- ALLOWS YOU TO USE A STANDARD 8OHM SPEAKER INSTEAD OF A TELEPHONE SPEAKER. TO
- ACCOMPOLISH THIS WE USE A MATCHING TRANSFORMER.
-
- HOW TO CONSTRUCT IT:
- A FEW CONSTRUCTION NOTES. I SUGGEST THAT YOU SOLDER AND TAPE ALL CONNECTIONS.
-
- [1] CONNECT THE RED WIRE OF THE TRANSFORMER TO EITHER TERMINAL ON THE SPEAKER.
- [2] CONNECT THE WHITE WIRE FROM THE TRANSFORMER TO THE OTHER TERMINAL ON THE
- SPEAKER.
- [3] CONNECT THE RED (POSITIVE) WIRE OF ONE BATTERY CLIP TO THE BLACK WIRE OF
- THE OTHER BATTERY CLIP.
- [4] CONNECT THE REMAINING RED WIRE ON THE BATTERY CLIP TO PIN #1 ON THE IC.
- [5] CONNECT THE CRYSTAL TO PIN #7 AND PIN #8 ON THE IC.
- [6] CONNECT THE BLUE WIRE FROM THE TRANSFORMER TO PIN #16 ON THE IC.
- [7] CONNECT THE GREEN WIRE FROM THE TRANSFORMER AND THE OTHER BLACK WIRE FROM
- THE BATTERY CLIP TO PIN #6.
- [8] CONNECT ONE SIDE OF THE SWITCH TO PIN #9. CONNECT THE OTHER SIDE OF THE
- SWITCH TO PIN #5 (ONLY FOR 12 BUTTON PADS).
- [9] SINCE KEYPADS MAY DIFFER, TRY TO GET A PINOUT OF THE PAD YOU ARE USING. TH
- PAD I HAVE HAS 8 PINOUTS. ONE IS A GROUND (THIS GOES TO PIN #6 ON THE IC).
- 1,4,7,* KEYS CONNECT TO PIN #3. 2,5,8,0 KEYS CONNECT TO PIN #4. 3,6,9,#
- KEYS CONNECT TO THE CENTER OF THE SWITCH. 1,2,3 KEYS CONNECT TO PIN #14.
- 4,5,6 KEYS CONNECT TO PIN #13. 7,8,9 KEYS CONNECT TO PIN #12. *,0,# KEYS
- CONNECT TO PIN #11.
- [10] CHECK ALL CONNECTIONS TO MAKE SURE NONE ARE TOUCHING EACH OTHER.
- [11] CONNECT THE TWO NINE VOLT BATTERIES AND YOUR KEYPAD IS COMPLETE.
-
- NOTE: THE REMAINING PINS ON THE IC ARE NOT USED. THE BLACK WIRE ON THE
- TRANSFORMER IS ALSO NOT USED. WHEN NONE OF THE BUTTONS ARE PRESSED, THIS
- UNIT USES NO POWER, THEREBY ELIMINATING THE NEED FOR A POWER SWITCH.
-
- PARTS REQUIRED:
-
- 1) 5089 DTMF TONE ENCODER (RS 276-1301)
- 2) AUDIO TRANSFORMER (RS 273-1380)
- 3) TV COLORBURST CRYSTAL 3.579545 MHZ (RS 272-1310)
- 4) 9V BATTERY STRAPS X2 (RS 270-325)
- 5) 9V BATTERY X2 (RS 23-464)
- 6) WIRE WRAP SOCKET (RS 276-1994)
- 7) SWITCH DPDT (RS 275-663)
- 8) KEYPAD (CARDINAL ELECTRONICS)
- 9) SPEAKER 8OHM (RS 40-245)
- 10) CIRCUIT BOARD (OPTIONAL)
- 11) CONNECTING WIRE OR WIRE WRAP
- 12) BOX (OPTIONAL)
-
-
- CRYSTAL (3.579545 MHZ)
- +-#-+
- ! +-+ +--------------------------------------------------- +18V --+
- ! ! ! !
- ! ! +---------!----------------+--------------------+ ---
- +----------------+ ! +--+ -
- !. . . . . . . . ! --- !
- !8 7 6 5 4 3 2 1 / - !
- ! ! NOTCH RED WIRE OF !
- !9 0 \ \ TRANSFORMER !
- !. . . . . . . . ! SPEAKER -> !]============ ! <-GREEN WIRE OF
- +----------------+ / WHITE WIRE OF TRANSFORMER
- ! TRANSFORMER
- +----------------------------------------+
- ! <-BLUE WIRE OF
- #3 #4 +----------------------------+ TRANSFORMER
- ! ! ! !
- !
- [ ] [ ] [ ] -> #14 #5 <-+ ! +-> #9
- ! ! !
- [ ] [ ] [ ] -> #13 +--+--+
- / SWITCH
- [ ] [ ] [ ] -> #12 /
-
- [ ] [ ] [ ] -> #11
-
- KEYPAD
-
-
- KEY FREQ. #1 FREQ. #2
- --- -------- --------
- 1 697 1209
- 2 697 1336
- 3 697 1477
- A 697 1633
-
- 4 770 1209
- 5 770 1336
- 6 770 1477
- B 770 1633
-
- 7 852 1209
- 8 852 1336
- 9 852 1477
- C 852 1633
-
- * 941 1209
- 0 941 1336
- # 941 1477
- D 941 1633
-
- ALL FREQUENCIES ARE MEASURED IN HERTZ.
-
- -=%>USAGE OF A SILVER BOX<%=-
-
- FIRST OFF, A SILVER BOX ADDS THE FOUR EXTRA TONES TO YOUR PHONE THAT MA BELL
- NEVER TOLD YOU ABOUT. THEY GO LIKE THIS:
-
- 1 2 3 A
- 4 5 6 B
- 7 8 9 C
- * 0 # D
-
- THERE USED TO BE MANY PLACES WHERE YOU COULD USE SILVER BOX TONES, BUT NOW YO
- CAN ONLY USE IT IN PLACES WHERE MA BELL HASN'T GOTTEN AROUND TO REPLACING HER
- OLD SWITCHBOXES, (4A), OR ON AUTOVAN. AUTOVAN IS A SPECIAL MILITARY PHONE LINE,
- LIKE A MASS OF PRIVATE LINES HOOKED TOGETHER. TO SEE IF A SPECIFIC AREA HAS THE
- OLD 4A SWITCHBOXES TRY THIS TEST:
- CALL UP THE DIRECTORY ASSISTANCE BY USING XXX-555-1212, (WHERE XXX IS THE ARE
- CODE YOU ARE CHECKING OUT. NOW HOLD DOWN THE "D" KEY AS SOON AS YOU FINISH
- DIALING. (IF YOU ARE USING THE TOGGLE SWITCH TYPE THEN FLIP THE SWITCH AND HOLD
- DOWN THE "#" KEY.) THE PHONE SHOULD START RINGING AND THE OPERATOR WILL ANSWER.
- IF THE OPERATOR SCREAMS AT YOU TO STOP PRESSING YOUR KEYPAD, THEN HANG UP AND
- TRY A DIFFERENT AREACODE (THIS ONE DOES NOT WORK.)
- IF YOU GET A PULSING TONE THEN YOU GOT A GOOD LINE! NOW TRY OUT DIFFERENT
- NUMBERS. 6 AND 7 USUALLY FORM A LOOP LINE AND TWO PEOPLE WITH SILVER BOXES CAN
- TALK. SOME OF THESE ARE WATCHED, SO DON'T SAY ANYTHING YOU WOULDN'T WANT YOUR
- MOTHER TO HEAR!
-
-
- ANY KEY TO CONTINUE.
-
-
-
-