amplification of a bluetooth signal.

Discussion in 'General Electronics Chat' started by redacejr, Jan 14, 2010.

  1. redacejr

    Thread Starter Active Member

    Apr 22, 2008
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    i found out recently that i can use my cellphone to remote control media player and stuff on my pc ... using my cellphone bluetooth and a usb-bluetooth interface connected to my pc (using software : IVT corporation blue soleil)

    sadly enough because the bluetooth-pendrive is facing the wall behind the tower , i get only a 2 metre renge until i lose the connection between my cell and the pc , which makes it quite useless in a a 10mx9m room

    even with the cellphone sitting on my tower my pc gets 3 out of 5 reception bars .....


    is there a way to amplify a bluetooth signal?

    even if its a project (some sort of router i can make) , i dont mind doing those :D
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. redacejr

    Thread Starter Active Member

    Apr 22, 2008
    85
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    According to the program

    The pndrive is uzing universal compatible usb connection up to 2.1version


    my cellphone is using the 2.0
     
  4. lmartinez

    Active Member

    Mar 8, 2009
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    What are the frequencies that you would like to amplify?
     
  5. sha77ti

    New Member

    Aug 1, 2008
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    is there any associated software pertaining to the ???
     
  6. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Build a corner reflector. Easy, cheap, and you don't need anything more than a cardboard box and some aluminum foil.

    If you don't know what I'm talking about, Google: "Corner reflector"
     
  7. rjenkins

    AAC Fanatic!

    Nov 6, 2005
    1,015
    69
    The simplest approach is to get a better USB Bluetooth adapter.

    There are two classes of bluetooth module, one with nominally 10M range and the other with 100M Range.

    (I have Belkin K7S F8T017 Class 1 Bluetooth 2.1 adapters on all my machines, one of these works to my bluetooth stereo headphones for 30ft through two brick walls).

    Another simple method is to get a USB extension cable (A plug to A socket) and try moving the module to a better location.

    Amplification is not simple, but a better antenna will give gain on both transmit and receive.

    Assuming it's not a micro-side device, if you remove the case from the bluetooth module, you should find a zig zag circuit track antenna in the end.

    You can break the PCB track coming out of the electronics to this (flush with the end of the ground plane area) and connect a WiFi antenna to it.
    - Both Bluetooth and WiFi share the same 2.4GHz band.

    You could use a laptop style, or fit a pigtail adapter with a socket to take a Access point / router antenna. Cut whatever original connector off the coax cable and solder directly to the cut track (and screen to ground plane) in the bluetooth module.
    Keep the separated parts of the connections as short as possible, like 3mm or less.
     
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