47 lines
1.9 KiB
Plaintext
47 lines
1.9 KiB
Plaintext
| 17-JUN-1987 Red box info
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HOW TO BUILD AND USE A RED BOX......
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=<COURTESY OF -<U.N>->=
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=<TYPED BY THE MASTER >=
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----------------------
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THE RED BOX BASICALLY SIMULATES THE SOUND OF COINS BEING DROPPED INTO THE COIN
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SLOT OF A PAY TELEPHONE. A PAY TELEPHONE GENERATES A BURST OF TWO MIXED FREQUENC
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IES, 1700 HZ AND 2200 HZ, FOR A SPECIFIC TIME INTERVAL TO DENOTE A NICKLR, DIME,
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OR QUARTER. A NICKLE IS 1700 HZ +2200 HZ FOR 66 MILLISECONDS. A DIME IS 1700 HZ
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+ 2200 HZ FOR 66 MILLI. SECS. ON, 66 MS. OFF , THEN 66 MS ON AGAIN. FINALLY, A
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QUARTER IS 1700 HZ+2200 HZ FOR 33,MS ON, 33 MS, OFF, CONTINUOSLY REPEATING FOR 5
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TIMES.
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WHEN USING A RED BOX ON A PAY PHONE, FIRST DEPOSIT A REAL NICKLE (BECAUSE T
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HEY CAN TELL IF THE FIRST ONE IS A REAL ONE OR JUST A TONE), THEN USE THE TONE B
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URST. YOU CAN BUILD THE CIRCUIT TO GENERATE A NICKLE TONE, THEN RECORD IT AND PL
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AY IT INTO THE PAY PHONE WITH A WALKMAN CASETTE PLAYER.
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TO GET THE MAP, SEND $2 DOLLARS TO
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MASTER WORLD
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1609 S. BENTLEY AVE
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LOS ANGELES, CALIFORNIA 90025
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THE MAP HAS MANY FIGURES THAT THE COMPUTER CANNOT PRODUCE.
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IF YOU HAVE THE MAP , HERE ARE SOME TIPS
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ADJUST R1 TO GET 2200 HZ AT POINT A
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ADJUST R2 " " 1700 HZ " " B
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PRESS SWITCH FOR 66 MS ON AT SPEAKER
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THIS SIMULATES A NICKLE
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THE 555 TIMER-> 66MS TIMER
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THE 556 DUAL TIMER->2200HZ+1700HZ GENERATOR
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741->TIMER OP AMP BUFFER
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FOR SPEAKER
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SO REMEMBER IF YOU DON'T HAVE THE MAP SEND TWO DOLLARS TO THE ADDRESS UP
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ABOVE
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--- The World of Cryton (UK)
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--- +44 4 584 7608
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