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Text File  |  1994-05-22  |  17KB  |  275 lines
  1. The Infinity Transmitter                  courtesy of Exodus
  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 This device was originally made by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. | |              |                  |                                     |
  145. | |              |                  |                                     |
  146. | |              |               C6 |                                     |
  147. | |              |             |-)|-'             R9                      |
  148. | |              |             !_________________/\/\/_______.            |
  149. | |              |             |                             |            |
  150. | |              |         Q1 _!_                            |   R10      |
  151. | |              !____________/ \____________________________!__/\/\/_____!
  152. | |              |                                           |            |
  153. | |              |                                           |            |
  154. | |              |          C8                               |            |
  155. | |              !__________)|_______________________________|____________!
  156. | |              !                                           |            |
  157. | |             /                                            |            |
  158. | |       -----|                                             |            |
  159. | |       |     \                                            |            |
  160. | |       |      >                                           |            |
  161. | |       |      |                                           |            |
  162. | |       |      |                                           |            |
  163. | |       |      !_____________.                             |            |
  164. | |       |                    |                             |            |
  165. | |       !__________.         |                             |            |
  166. | |                  |         |                             |            |
  167. | !________.         |         |                       ._____!            |
  168. |          |         |         |                       |                  |
  169. |          |         |         |                       |                  |
  170. |          |         |         |                       | C7               |
  171. |          |         |         |                       '-|(-|             |
  172. |          |_________|_________!_______.T1._________________|             |
  173. |                    |         |  1500 )||( 500                           |
  174. |                    |         |   ohm )||( ohm                           |
  175. |                    |         !______.)||(.__.                           |
  176. |                    |         |              |                           |
  177. |                    |         |              |                           |
  178. |                    |         |              >                           |
  179. |                    |         |            |/                            |
  180. |                    |         |       +----|   Q3                        |
  181. |                    |         |       |    |\                            |
  182. !____________________|_________|_______|______!__. D1   C9                |
  183.                      |         |       |         '-|<---|(------|         |
  184.       .______________!         |       |                        |         |
  185.       |                        |       |                        |         |
  186.       |       .________________!       |                        |         |
  187.       |       |                        |                        |         |
  188.       \       |       .________________!             C11        |         |
  189.       /       |       |                       .___||____________!         |
  190.   R13 \       |       |                       |   ||            |         |
  191.       /       |       |                       |                 |         |
  192.       \       !___.___|_______________________!                 |         |
  193.       |       |   |   |                       |     R16         |    R15  |
  194.       |       v   |   |                       !___/\/\/\________!___/\/\/_!
  195.       |      neg  |   |                       |    D2           |         |
  196.       |    return |   |                       !_____|<__________!         |
  197.       |     B1,B2 |   \                       |                 |         |
  198.       |           |   /                       |    .____________!_.       |
  199.       |           |   \R14                    |C12 |   TM1      2 |       |
  200.       |           |   /                       !_||_!5            4!_______!
  201.       |           |   \                       | || |              |       |
  202.       |           |   |                       !____!1            8!_______!
  203.       |           |   |                       |    |     7 6   3  |       |
  204.       |           |   |                       |    !_____._.____._!       |
  205.       |           |   |                       |          | |    |         |
  206.       |           |   |                       |   C13    | |    |   R17   |
  207.       |           |   |                       !___)|_____!_!____|__/\/\/__!
  208.       |           |   |                       |                 |         |
  209.       !___________|___!_______________________|_________________!         |
  210.                   |   |                       |                           |
  211.                   |   \                       |          C10              |
  212.                   |   /R18                    !__________)|_______________!
  213.                   |   \
  214.                   |   /
  215.                   |   |
  216.                   !___O J1
  217.                     sense output
  218.  
  219. Construction notes: Because the damned book just gave a picture instead of step
  220. by step instructions, and I'll try to give you as much help as possible. Note
  221. that all the parts that you will be using are clearly labeled in the schematic.
  222. The perfboard, knobs, 'gator clips, etc are optional. I do strongly suggest
  223. that you do use the board!!! It will make wiring the components up much much
  224. easier than if you don't use it.
  225.  The knob you can use to control the pot (R7). R7 is used to tune the IT so
  226. that is sounds ok over the phone. (You get to determine what sounds good) By
  227. changing the value of C13, you can change the amount of time that the circuit
  228. will stay open (it cannot detect a hang up, so it works on a timer.) A value of
  229. 100 micro Farads will increase the time by about 10 times.
  230.  The switch (S1) determines whether or not the unit is operational. Closed is
  231. on. Open is off. The negative return is the negative terminals of the battery!!
  232. The batteries will look something like this when hooked up:
  233.  
  234.   <-v_____.   .______.    ._____.   .____->
  235.           |   |      |    |     |   |
  236.         __!___!__    |    |   __!___!__
  237.         | +   - |    !_/ _!   | +   - |
  238.         |       |  switch ^   |       |
  239.         | 9volts|         |   | 9volts|
  240.         !_______! neg return  !_______!
  241.  
  242.  To hook this up to the phone line, there are three ways, depending upon what
  243. type of jack you have. If it is the old type (non modular) then you can just
  244. open up the wall plate and connect the wires from the transmitter directly to
  245. the terminals of the phone.
  246.  If you have a modular jack with four prongs, attach the red to the negative
  247. prong (don't ask me which is which! I don't have that type of jack... I've only
  248. seen them in stores), and the green to the positive prong, and plug in. Try not
  249. to shock yourself...
  250.  If you have the clip-in type jack, get double male extension cord (one with a
  251. clip on each end), and chop off one clip. Get a sharp knife and splice off the
  252. grey protective material. You should see four wires, including one green and
  253. one red. You attach the appropriate wires from the IT to these two, and plug
  254. the other end into the wall.
  255.  
  256. Getting the IT to work: If you happen to have a problem, you should attempt to
  257. do the following (these are common sense rules!!) Make sure that you have the
  258. polarity of all the capacitors right (if you used polarized capacitors, that
  259. is). Make sure that all the soldering is done well and has not short circuited
  260. something accidently (like if you have a glob touching two wires which should
  261. not be touching.) Check for other short circuits. Check to see if the battery
  262. is in right. Check to make sure the switch is closed.
  263.  If it still doesn't work, drop me a line on one of the Maryland or Virginia
  264. BBSs and I'll try to help you out.
  265.  
  266. The sense output: Somehow or other, it is possible to hook something else up to
  267. this and activate it by phone (like an alarm, flashing lights, etc.)
  268.  
  269. As of this writing, I have not tried to make one of these, but I will. If you
  270. actually get it working, leave me a note somewhere.
  271.  
  272. I sure hope all you people appreciate this.
  273.  
  274.  
  275.