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detecting mobile devices

Discussion in 'Electronic Basics' started by erez, Sep 11, 2005.

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  1. erez

    erez Guest

    I am looking to build a circuit or to hack an existing device that can
    sense an incoming call or an out going call from a mobile device, from
    5~4 meters

    I was able to use normal gadget that blink when an incoming call is
    The problem is that they don't work well with 3G phones like the Nokia
    Any ideas how can I build a circuit
    Or if there are existing devices on the market?

  2. Art

    Art Guest

    Maybe some of the "Bugging" sites may have the snoop circuit you so desire.
  3. erez

    erez Guest

    I don't want to listen to the conversation,
    I am building an art installation that talks about communication over
    mobile devices as a cultural phenomena
    As people use mobile devices around the art piece they activate it
    any help will be appreciated
  4. Jasen Betts

    Jasen Betts Guest

    1: find out what frequencies the mobile devices operate on,
    (I think 3G is 2.4GHz)
    2: build (or purchase) recieverrs for those frequencies.
    3: adjuste the sensitivity of the receivers (or antennas)
    to detect only nearby devices.

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