Hi Angel

I have the Amateur Scientist  CD.  Do you still need the article?

I am collecting parts for a microbarograph similar to
http://www.belljar.net/microbar.htm
I am planning to take my QM-4.5 geophone electronics
and replace the geophone/opamp with
a low pressure differential sensor and an instrumentation
amp.  Everything  else would remain the
same and Amaseis could be used for data logging.  
Here is another interesting microbarograph reference with
pictures of a wind noise reduction system
http://www.knmi.nl/~evers/infrasound/web-article/how.html

BTW: I recently got some ADXL103 1-axis accelerometer
samples and I have found that I can mount them along with
a tuning capacitor on an 8 pin DIP-surface mount adapter 
board and then plug this into the 8 pin DIP opamp
socket on my QM-4.5 board, and that is all that is
required to produce a single axis +/-1.5g strong motion
seismometer.  My 16 bit ADC resolution is 0.076mg and the
noise level at my 0-4.5 Hz bandwidth is 3.5adc units or
about 0.3mg.  Can I send one to you to try out on
your QM-4.5 board?  I would like to see if you can
detect a quake with it.  I may have to wait some time for
a +1mg seismic event here in VA.

Ciao,

Dave
http://www.infiltec.com/seismo

> Subject: Amateur Scientist CD
> From:    Angel 
> Date:    Sat, 12 Nov 2005 09:26:54 -0500
> 
> Hi All,
> 
> Does anyone on the list have the Scientific American Amateur Scientist
> CD.  I am looking for an article that described how to make a
> microbarograph with a 2 liter pop bottle.  It was years ago.  I think
> that a note the I have refers to May of 1998, I think the article was
> called "Atmospheric Tsunamis" or something like that.  I stopped my
> subscription to Scientific American when they stopped the Amateur
> Scientist column.  I had clipped the article but in a fit of getting
> rid of junk I think I deep six'd that one.
> 
> Thanks,
> 
> Angel

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