Hi.
Been reading the mailing list archives for about a year now, and you guys 
have inspired me to build my own seismometer.
Space is limited here, so a big Lehman (or two) was out of the question. 
After settling on the SG type of design, I thought
that I'd try a double hinge that swings in both directions... and build two 
SG seismometers in the one box.
Nobody else seems to have tried carbon fibre to reduce thermal expansion 
problems, so I thought I'd try that too.

As you can see from the pictures, the project got out of hand.   Etched 
brass labels, a stained wood cabinet, a big gauge
with hand wound coils and even onboard audio for "alert! alert! alert!" if 
an earthquake is detected.

Its only been running a short while and the software still cant save data, 
but it certainly seems sensitive enough to pick
up every movement of my shaky 3rd floor block of flats.    Simply walking 
into the room tilts the floor enough for an almost
full scale reading.

Opinions?   Thoughts?
http://www.brasswings.com/seis.html

cheers...
Glenn   (Melbourne, Australia)

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