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Here is a wonderful idea to make, receive, or trap phone calls through computer! In fact, you can start your own independent telephony; what can be better than that?


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Steps

  1. 1
    Have a headphone and a small ear bud. The A.C. of the ear bud and have a 2-feet long thin conductor should be able to flow that A.C.
  2. 2
    Connect the pin of your ear bud into a socket, where it can stick to easily. Connect the wires of socket to the base of antennae.
  3. 3
    Place the antennae on the roof and place the ear bud on your table. You can use this ear bud to hear to the caller. For a better listening experience, you can use speakers instead of ear buds.
  4. 4
    Connect your microphone's pin to the antenna.
  5. 5
    Repeat once, but this time, in your friend's house.
  6. 6
    Make a coil of a low resistant metal wire and have a secondary antenna and place its base into the coil. Expose its base, very near to tip of primary antennae, and connect the ends of secondary antenna's coil to a source of 400 W (a switch connected to mains supply). The circuit should not carry resistance of more than 10 Ω.
  7. 7
    Connect secondary antenna to primary antenna through circuit in which current is directed towards primary antenna. Before, primary antennae, a step down transformer ought to be used to give supply of only that much current of that much potential, which is needed by ear plug.
  8. 8
    You're almost done. Now, you have to check the furthest point where signals can be easily received. You can extend the limit by placing another antenna, just as secondary antenna.
  9. 9
    If your friend's system is under limit, you can talk to him directly and unlimited amounts, without any ringing system. You can break the circuit whenever you want to go off line. Now it is your turn.
  10. 10
    Find your own way to connect its audio jacks to computer to record or talk conversations more efficiently. With help of a programming language, installed into your PC, you can make your PC ring whenever it receives any signals.

Tips

  • Antenna should act as a good electromagnet.
  • Secondary antennae should be very high and must have supply of 15000-16750 watts of additional power to weak signals from primary antenna.its length must be about 2 m.
  • This is a uni-calling system and so only 2 people can talk.
  • This uni system can be used as a radio system as well.
  • Refer to equations of near-far fields, transmission and sensitivity for better output & understanding your system. Or you can use call log in mobile partner to know the history of your calls.

Warnings

  • Be very careful in using electricity of very high AC potential or power. Use insulation and covers wherever necessary and also put signs of danger wherever necessary.
  • Such a high current can even put you to death.
  • It will be convenient for you if you make a board and carry all information of electrical supply & electromagnetic field outside secondary antenna.
  • After setup, cover emitting and receiving points with a translucent and insulative material. Cover only after opening circuit .

Article Info

Categories: Stub | Phones and Gadgets

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