76 lines
2.9 KiB
Plaintext
76 lines
2.9 KiB
Plaintext
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***************************************
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* WARGAMES MAGAZINE SECTION *
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***************************************
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This bulletin describes how to take a standard touch tone keypad and convert it
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to a portable unit. In addition, I give the touch tone frequencies. First of
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all, the tones generated by a standard touch tone keypad (like one on a
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standard telephone) are not single tones, but a combination of two tones for
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each key pressed. Standard keypads normally generate 12 tone combiNations
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The power required by a keypad is about 25 volts, but they will work with as
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little as 15, thereby allowing the use of two 9- volt radio batteries. As you
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may have guessed, they are also designed to operate with a telephone type
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speaker (and phone line), and not the standard 8-ohm speaker which needs to be
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used for adequate volume. To accompolish this, we use a matching transformer,
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this is one of those miniature ones available at Radio hack. Enough of the
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theory, now for the circuit. You will need:
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A touch tone keypad
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A miniature 1000 to 8 ohm transformer (Radio Shack # 273-1380)
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A standard 8-ohm speaker
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Two 9-volt radio batteries
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Two 9-volt battery clips
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A case to put it all in (optional)
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A few construction notes, I suggest that you solder and tape all connections.
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It is also important to read this entire bulletin before attempting to
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construct this. First, connect the RED wire of the transformer to either
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terminal on the speaker. Now connect tHe WHITE wire from the transformer to
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the other terminal on the speaker. Next, connect the RED (positive) wire of
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one battery clip to the black wire of the other battery clip. Now connect the
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the remaining RED wire on the second battery clip to the GREEN wire from the
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touch tone pad. Connect the BLUE wire from the touch tone pad to the keypad.
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Connect the BLACK wire from the keypad to the BLUE wire on the transformer.
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Next connect the RED-and-GREEN striped wire from the keypad to the GREEN wire
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on the transformer. The BLACK wire on the transformer should not be connected
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to anything, along with quite a few wires from the keypad. The connection of
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the keypad is now complete. All you have to do is connect two nine volt
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batteries to the battery clips, and you'll be ready to Note that the silver box
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modification CAN be made to this unit, allowing complete remote phreaking.
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When none of the buttons are pressed, this unit uses NO power, thereby
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eliminating the need for a power switch, and extending the life of the
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batteries.
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The following are the frequency combinations generated by each button on the
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keypad.
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KEY FREQ. #1 FREQ. #2
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--- -------- --------
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1 697 1209
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2 697 1336
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3 697 1477
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A 697 1633
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4 770 1209
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5 770 1336
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6 770 1477
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B 770 1633
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7 852 1209
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8 852 1336
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9 852 1477
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C 852 1633
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* 941 1209
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0 941 1336
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# 941 1477
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Call The Works BBS - 1600+ Textfiles! - [914]/238-8195 - 300/1200 - Always Open
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