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Text File  |  1992-06-08  |  3KB  |  71 lines
  1. Circuit to connect SEGA 3D glasses to RS-232 port.
  2. --------------------------------------------------
  3.  
  4.        RS-232
  5.      DB25 / DB9
  6.                                                    10K
  7. RTS   4      7  Switching signal +/- 10V  --------vvvvv--+
  8.                                                          |
  9.                                                          |
  10. GND   7      5  Ground ----+-------------+--+---------+--|----+
  11.                            |             |  |         |  |    |
  12.                            |             |  +-|>|--+  |  |    |
  13.                            +--|>|--+    ---        |  |  |    |  Transistor
  14.                                    |    ---  22 uF |  |  |    |   2N2222
  15.                                    |     |         |  |  |  +-+---------+
  16.                                    |     |         |  |  |  | Emitter   |
  17.                                    |     |         |  |  |  |           |
  18. DTR  20      4  Vdd +10V --|>|-----+-----+         +--|--+--+ Base      |
  19.                                          |            |     |           |
  20.                               +--+--+--+-+-vvvvv---+--|-----+ Collector |
  21.                               |  |  |  |    10K    |  |     |           |
  22.                               |  |  |  |           |  |     +-----------+
  23.                       +-------+--+--+--+-----------+--+--+
  24.                       |       1  9  13 14          5  7  |
  25.                       |                                  |
  26.                       |   RCA CD 4030 Quad XOR gate      |
  27.                       |                                  |
  28.                       | 2 11  12       3  6  8   10   4  |
  29.                       +-+--+---+-------+--+--+----+---+--+
  30.                         |  |   |       |  |  |    |   |
  31.                         +--+   |       +--+--+    |   +--- Outside of jack
  32.                            |   |             |    |
  33.                            |   +-vvvvv-+     |    +------- Middle of jack
  34.                            |      22K  |     |
  35.                            |           |     +------------ Centre of jack
  36.                            +-vvvvv-----+     |
  37.                               22K      |     |
  38.                                       ---    |
  39.                               .01 uF  ---    |
  40.                                        |     |
  41.                                        +-----+
  42.  
  43. Diode:     --|>|--
  44.  
  45. Resistor:  --vvvvv--
  46.  
  47. Capacitor:   |
  48.             ---
  49.             ---
  50.              |
  51.  
  52. This is my best attempt at a rendition of the circuit which connects my
  53. SEGA glasses to my AT. I didn't design the circuit -- I'm a software
  54. rather than hardware person. In fact I barely understand it -- as far as
  55. I can tell, the .01uF capacitor & the 22K resistors act as a delay. The
  56. outputs of the XOR gates feed back into their own inputs, thus producing
  57. an oscillator. The "jack" mentioned in the diagram is the mini-jack
  58. which is connected as standard to the glasses. "Centre", "middle", and
  59. "outside" relate to the external connections, looking at the thing
  60. end-on.
  61.  
  62. Disclaimer: The circuit diagram above may be entirely wrong. My
  63. description may be wrong.
  64.  
  65. Caveat emptor... to paraphrase the standard software licence agreement:
  66. It's as good as I can get it. If it doesn't work or blows up your
  67. computer or your glasses and blinds you for life, I'll give you back all
  68. the money you paid me.
  69.  
  70. Good Luck...    Frank.
  71.