Hi, list,

Weirdly, over the last 6 months, between 12 midnight and 6 AM, when my 
wife and I are sleeping, she will occasionally be awakened by a 
"shaking." We live in northern Illinois, in a rural area, miles away 
from any urban development, gravel pits, or anything such like. I 
consistently sleep through it.

I was thinking to build a vibration sensor using a MSP430 (sorry PICers) 
and one of AD's accelerometer chips, to log the disturbance.

Does anyone have any idea what kind of G range something like that 
should measure?

Mark

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