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Text File  |  1994-07-17  |  17KB  |  276 lines
  1. The Infinity Transmitter                  courtesy of the Jolly Roger
  2.                                           originally typed by:
  3.                                                     <<<Ghost Wind>>>
  4.  
  5.                          FROM THE BOOK BUILD YOUR OWN
  6.          LASER, PHASER, ION RAY GUN & OTHER WORKING SPACE-AGE PROJECTS
  7.                        BY ROBERT IANNINI (TAB BOOKS INC)
  8.  
  9. Description:  Briefly, the Infinity Transmitter is a device which activates a
  10. microphone via a phone call.  It is plugged into the phone line, and when the
  11. phone rings, it  will immediately intercept the ring and broadcast into the
  12. phone any sound that is in the room. This device was originally made by
  13. Information Unlimited, and had a touch tone decoder to prevent all who did not
  14. know the code from being able to use the phone in its normal way.  This
  15. version, however, will activate the microphone for anyone who calls while it is
  16. in operation.
  17. NOTE:  It is illegal to use this device to try to bug someone. It is also
  18. pretty stupid because they are fairly noticeable.
  19. Parts List:
  20. Pretend that uF means micro Farad, cap= capacitor
  21.  
  22. Part           #          Description
  23. ----           -          -----------
  24. R1,4,8         3         390 k 1/4 watt resistor
  25. R2             1         5.6 M 1/4 watt resistor
  26. R3,5,6         3         6.8 k 1/4 watt resistor
  27. R7/S1          1         5 k pot/switch
  28. R9,16          2         100 k 1/4 watt resistor
  29. R10            1         2.2 k 1/4 watt resistor
  30. R13,18         2         1 k 1/4 watt resistor
  31. R14            1         470 ohm 1/4 watt resistor
  32. R15            1         10 k 1/4 watt resistor
  33. R17            1         1 M 1/4 watt resistor
  34. C1             1         .05 uF/25 V disc cap
  35. C2,3,5,6,7     5         1 uF 50 V electrolytic cap or tant
  36.                           (preferably non-polarized)
  37. C4,11,12       3         .01 uF/50 V disc cap
  38. C8,10          2         100 uF @ 25 V electrolytic cap
  39. C9             1         5 uF @ 150 V electrolytic cap
  40. C13            1         10 uF @ 25 V electrolytic cap
  41. TM1            1         555 timer dip
  42. A1             1         CA3018 amp array in can
  43. Q1,2           2         PN2222 npn sil transistor
  44. Q3             1         D4OD5 npn pwr tab transistor
  45. D1,2           2         50 V 1 amp react. 1N4002
  46. T1             1         1.5 k/500 matching transformer
  47. M1             1         large crystal microphone
  48. J1             1         Phono jack optional for sense output
  49. WR3            (24")     #24 red and black hook up wire
  50. WR4            (24")     #24 black hook up wire
  51. CL3,4          2         Alligator clips
  52. CL1,2          2         6" battery snap clips
  53. PB1            1         1 3/4x4 1/2x.1 perfboard
  54. CA1            1         5 1/4x3x2 1/8 grey enclosure fab
  55. WR15           (12")     #24 buss wire
  56. KN1            1         small plastic knob
  57. BU1            1         small clamp bushing
  58. B1,2           2         9 volt transistor battery or 9V ni-cad
  59.  
  60. Circuit Operation: Not being the most technical guy in the world, and not being
  61. very good at electronics (yet),  I'm just repeating what Mr. Iannini's said
  62. about the circuit operation.  The Transmitter consists of a high grain
  63. amplifier fed into the telephone lines via transformer.  The circuit is
  64. initiated by the action  of  a voltage transient pulse occurring across  the
  65. phone line  at the instant the telephone circuit is made (the ring,  in other
  66. words).  This transient immediately triggers a timer  whose output  pin  3 goes
  67. positive, turning on transistors Q2 and  Q3. Timer TM1 now remains in this
  68. state for a period depending on the values  of R17 and C13 (usually about 10
  69. seconds for  the  values shown). When Q3 is turned on by the timer, a simulated
  70. "off hook" condition is created by the switching action of Q3 connecting the
  71. 500  ohm  winding  of the transformer directly across  the  phone lines.
  72. Simultaneously, Q2 clamps the ground of A1, amplifier, and Q1, output
  73. transistor, to the negative return of B1,B2, therefore enabling this amplifier
  74. section.  Note that B2 is always required by  supplying  quiescent power to TM1
  75. during  normal conditions. System is off/on controlled by S1 (switch).
  76.   A  crystal mike picks up the sounds that are fed to  the  first two
  77. transistors of the A1 array connected as an emitter follower driving the
  78. remaining  two  transistors  as  cascaded   common emitters. Output of the
  79. array now drives Q1 capacitively coupled to  the  1500 ohm  winding of  T1.
  80. R7  controls  the  pick  up sensitivity of the system.
  81.   Diode  D1  is  forward biased at the instant of  connection  and essentially
  82. applies a negative pulse at pin 2 of TM1,  initiating the cycle.   D2 clamps
  83. any high positive pulses.   C9 dc-isolates and desensitizes the circuit. The
  84. system described should operate when any incoming call is made without ringing
  85. the phone.
  86.  
  87. Schematic Diagram:  Because this is text,  this doesn't look  too hot. Please
  88. use  a little imagination!  I will hopefully get  a graphics drawing  of  this
  89. out as soon as I  can  on  a  Fontrix graffile.
  90.  
  91. To be able to see what everything is, this character: | should appear as a
  92. horizontal bar. I did this on a ][e using a ][e 80 column card, so I'm sorry if
  93. it looks kinda weird to you.
  94.  
  95. Symbols:
  96.  resistor: -/\/\/-            switch: _/ _
  97.  battery:  -|!|!-             capacitor (electrolytic): -|(-
  98.  capacitor (disc): -||-                   _    _
  99.  transistor:(c)  > (e)        Transformer: )||(
  100.               \_/                          )||(
  101.                |(b)                       _)||(_
  102.  diode: |<
  103.  chip: ._____.
  104.        !_____! (chips are easy to recognize!)
  105.  
  106.  Dots imply a connection between wires. NO DOT, NO CONNECTION.
  107. ie.:  _!_ means a connection while _|_ means no connection.
  108. ----------------------------------------------------------------------------
  109.  
  110. .________________________to GREEN wire phone line
  111. |
  112. | .______________________to RED wire phone line
  113. | |
  114. | |     ._________(M1)______________.
  115. | |     |                           |
  116. | |     |           R1              |
  117. | |     !__________/\/\/____________!
  118. | |     |                          _!_ C1
  119. | |     |this wire is the amp      ___
  120. | |     |<=ground                   |                     R2
  121. | |     |                           !___________________/\/\/_____________.
  122. | |     |                   ._______!_______.                             |
  123. | |     !___________________!4      9     11!_____________________________!
  124. | |     |                   |               |                             |
  125. | |     !___________________!7            12._____________________________!
  126. | |     |                   |     A1        |              R3             |
  127. | |     !___________________!10       ____*8!_______.____/\/\/____________! ^
  128. | |     |                   |        /      |       |                     | |
  129. | |     |    C4             |       /       |       \                     |2ma
  130. | |     !____||______.      |      /        |       /R4                B1 +
  131. | |     |    ||      |      |     /         |       \                    |!|!
  132. | |     |     R7     |  C2  |    /          |       /                     |
  133. | |     !____/\/\/___!__)|__!8*_/           |       |                 S1  |
  134. | |     |     ^             |              6!_______!           neg<__/.__!
  135. | |     |     |     C3      |               |       | C5       return     |
  136. | |     |     !_____|(___.__!3              |       '-|(-|                |
  137. | |     |                |  |       5      1!____________!                |
  138. | |     |                \  !_______._______!            |             B2|!|!
  139. | |     !________.    R8 /          |                    |                +
  140. | |              |       \          |                    |      R6        |3ma
  141. | |              |       !__________!____________________|_____/\/\/______! |
  142. | |              |    R5            |                    |                | v
  143. | |              !__/\/\/___________|____________________!                |
  144. | |              |                  |