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Audio transmitter

Discussion in 'Audio' started by Ibraim, Jan 5, 2012.

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  1. Ibraim

    Ibraim

    3
    0
    Jan 5, 2012
    First, i'm new here, so, nice to meet you! =)

    Hi, on te internet there are a lot of simple projects of audio transmitters, but only in radio frequency. Do you know any circuit that works at a frequency that can't be captured by a radio? I need to get the signal through an another circuito, made by me.

    Thanks! :)
     
  2. BobK

    BobK

    7,673
    1,684
    Jan 5, 2010
    Infrared would be an option, but you have to have line of sight between the transmitter and receiver.

    Bob
     
  3. Ibraim

    Ibraim

    3
    0
    Jan 5, 2012
    Thank's bob, yes, it would be a problem. Isn't possible to create a circuit out of the radio frequency?
    A radio works between 88 and 108 Mhz, the transmitter has to be small, but the receptor doesn't...

    Any idea? =/

    Thank you!
     
  4. BobK

    BobK

    7,673
    1,684
    Jan 5, 2010
    88 to 108 MHz is the FM band. This is not all radio frequencies. Your initial post sounded like you wanted a means of transmitting audio that did not use ANY radio frequencies.

    Of course you can use frequencies outside the FM band. Amateur radio uses various other bands, for instance.

    Bob
     
  5. Ibraim

    Ibraim

    3
    0
    Jan 5, 2012
    I'm sorry, you're right! I mean something different of radio stations, and not the entire spectrum!... Do you know any circuit? The frequency is not important if i can't get the signal with a radio. Recalling that the transmitter has to be small.

    Thanks a lot!
     
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