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Text File  |  1990-01-01  |  3KB  |  72 lines
  1.  
  2. Circuit to connect SEGA 3D glasses to RS-232 port.
  3. --------------------------------------------------
  4.  
  5.        RS-232
  6.      DB25 / DB9
  7.                                                    10K
  8. RTS   4      7  Switching signal +/- 10V  --------vvvvv--+
  9.                                                          |
  10.                                                          |
  11. GND   7      5  Ground ----+-------------+--+---------+--|----+
  12.                            |             |  |         |  |    |
  13.                            |             |  +-|>|--+  |  |    |
  14.                            +--|>|--+    ---        |  |  |    |  Transistor
  15.                                    |    ---  22 uF |  |  |    |   2N2222
  16.                                    |     |         |  |  |  +-+---------+
  17.                                    |     |         |  |  |  | Emitter   |
  18.                                    |     |         |  |  |  |           |
  19. DTR  20      4  Vdd +10V --|>|-----+-----+         +--|--+--+ Base      |
  20.                                          |            |     |           |
  21.                               +--+--+--+-+-vvvvv---+--|-----+ Collector |
  22.                               |  |  |  |    10K    |  |     |           |
  23.                               |  |  |  |           |  |     +-----------+
  24.                       +-------+--+--+--+-----------+--+--+
  25.                       |       1  9  13 14          5  7  |
  26.                       |                                  |
  27.                       |   RCA CD 4030 Quad XOR gate      |
  28.                       |                                  |
  29.                       | 2 11  12       3  6  8   10   4  |
  30.                       +-+--+---+-------+--+--+----+---+--+
  31.                         |  |   |       |  |  |    |   |
  32.                         +--+   |       +--+--+    |   +--- Outside of jack
  33.                            |   |             |    |
  34.                            |   +-vvvvv-+     |    +------- Middle of jack
  35.                            |      22K  |     |
  36.                            |           |     +------------ Centre of jack
  37.                            +-vvvvv-----+     |
  38.                               22K      |     |
  39.                                       ---    |
  40.                               .01 uF  ---    |
  41.                                        |     |
  42.                                        +-----+
  43.  
  44. Diode:     --|>|--
  45.  
  46. Resistor:  --vvvvv--
  47.  
  48. Capacitor:   |
  49.             ---
  50.             ---
  51.              |
  52.  
  53. This is my best attempt at a rendition of the circuit which connects my
  54. SEGA glasses to my AT. I didn't design the circuit -- I'm a software
  55. rather than hardware person. In fact I barely understand it -- as far as
  56. I can tell, the .01uF capacitor & the 22K resistors act as a delay. The
  57. outputs of the XOR gates feed back into their own inputs, thus producing
  58. an oscillator. The "jack" mentioned in the diagram is the mini-jack
  59. which is connected as standard to the glasses. "Centre", "middle", and
  60. "outside" relate to the external connections, looking at the thing
  61. end-on.
  62.  
  63. Disclaimer: The circuit diagram above may be entirely wrong. My
  64. description may be wrong.
  65.  
  66. Caveat emptor... to paraphrase the standard software licence agreement:
  67. It's as good as I can get it. If it doesn't work or blows up your
  68. computer or your glasses and blinds you for life, I'll give you back all
  69. the money you paid me.
  70.  
  71. Good Luck...    Frank.
  72.