Dr. Peters,

Could you elaborate a bit on your comment that one sensor used for force 
feedback can have low sensitivity compared with another one used for 
detecting earthquakes?  It's not clear to me why that is.

Thanks for your help,

Brett Nordgren

At 09:41 AM 1/19/2008 -0500, you wrote:
>My colleague, John Lee, and I have developed a package that may be
>interesting to amateur seismologists.
>       Additionally, I have an idea that some of you may want to
>consider.
>     Any truly outstanding vertical seismograph requires force-feedback.
>The traditional approach is one that uses force balance.



>Since the sensor used for force feedback can have terrible
>sensitivity compared to the sensor used for detecting earthquakes--build
>a `centering' (feedback) package that uses the mouse sensor.




              My e-mail address above should be working, but if not
you can always use my mail form at: http://bnordgren.org/contactB.html
                            using your Web browser. 


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