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wireless bugs

Discussion in 'General Electronics Discussion' started by sethmaster, Feb 17, 2010.

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  1. sethmaster

    sethmaster

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    0
    Feb 10, 2010
    I am looking to make a simple wireless bug. Ive found alot of fm bugs but i dont want something that can be picked up by anyone with a radio. Any ideas on how to make it and what to use?
     
  2. davenn

    davenn Moderator

    13,576
    1,866
    Sep 5, 2009
    well they are radio transmitters and will be able to be picked up by a basic radio or a scanning receiver etc.

    the only way to stop some one being able to understand what is being said is to
    scramble the signal. so you will need to do a google search on audio scramblers
    so that you can then apply that scrambled audio to the transmitter modulator.

    One simple way to scramble audio is to do a frequency inversion of the audio signal
    ie ... 3kHz signals become 300Hz and visa versa

    cheers
    Dave
    VK2TDN
     
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