You can make your own with a piezo disk, a ball bearing and small capsule, like a plastic cover that fits over a tubular table leg, or even a cooldrink cap. The ball rests on the smooth side of the piezo, and when someone picks the device up, the ball bearing rolls to the side and,.. smack, generates a good many volts. Needs some filtering because it's very sensitive(but narrowband) to general floor noise.

Regards
Roland


>
>On Friday 23 September 2005 02:54 pm, alan smith scribbled:
>> I have an application that I was thinking of using an accelrometer for, but
>> now I wonder if there is a less expensive and easier method.  Essentially I
>> want to wake up the circuit if the box is picked up.  So I guess more of a
>> movement sensor....its known by another name, as googling hasn't been all
>> that helpful so far.
>>
>>
>> ---------------------------------
>> Yahoo! for Good
>>  Click here to donate to the Hurricane Katrina relief effort.
>
>
Regards
Roland Jollivet

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