BlackBerry Pearl data connection mystery

Whenever he starts BlackBerry Pearl’s data connection and places the phone next to the flashlight, the flashlight blinks. The radio waves seem to be interfering with the power connection in the flashlight, but can someone tell me in more detail what is happening?

{Thanks for sending this in Peter)

6 Responses to “BlackBerry Pearl data connection mystery”

  1. 1 Jim

    It’s hard to tell what kind of light that is, since it’s face down. If it’s a fluorescent or something with a balast, perhaps the data transmission is done at a frequency that causes a component to resonate, thus cutting off power. I wonder, does the Pearl use the same frequency for data and voice? If so, then the light should do the same thing when on a call. That might help identify the frequency that’s being used, and then you could try to work backward to find the actual component. If it’s an incandescent, I think most of those run on straight household power (i.e., no power supply to be interfered with by the BB). That would certainly be a more “interesting” problem!

  2. 2 Peter

    As soon as I read the title, I knew right away it had to be a GSM phone. My old Nextel, which is based on a similar transmission type, would trip GFCI outlets if you got close enough, not to mention the buzzing near speakers, etc. This is why they tell you to shut off phones on the plane. GSM will cause interference much more then a CDMA phone will.

  3. 3 Gareth

    This is EMC, see

    Basically the near field radiation from the handset is exciting the flashlight.

    I was in a Taxi once and took a call, when the central locking started to flash (on, off, on, off, on, off etc)

    Frequency and power are the key factors, although modulation can and associated harmonics may also contribute.

  4. 4 pete

    That’s my (evil!) phone.. Jim, the light is an LED work light from Griot’s Garage ( .. it is rechargeable and has a button on the back for on/off.

    Thx for posting guys!

  5. 5 wahtx

    I can only imagine what our phones are doing to our brains!

  6. 6 Wiltz

    my pearl causes major sound interference with my land line phone and my clock radio.

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