I started a Raspberry Pi seismograph project some years ago but didn’t finish it.
I decided that there were enough other people working on this that I didn’t have to.
Here are some things to consider:
Have a look at an ADS1115 ADC from AdaFruit or other supplier.
16 bit conversion, programmable gain, etc.
A commercial product seismograph is the Raspberry Shake. Comes complete!
Raspberryshake.org Cost is a few hundred dollars. VERY well designed. A friend of mine worked on the design.
The RS1D board goes between the sensor and the Raspberry Pi. $100 and up.
LOTS of software for looking at the seismograms.
Several possibilities for sensors:
4 Hz geophones for about $40
Racotech RGI-20DX geophone
Lehman “swinging gate” sensor, also vertical bar suspended by a spring
(Magnet and coil transducer) lots of info on the web.
Weight on a slinky spring with magnet and coil.
Search on slinky spring seismograph.
The acrylic tube is too pricey. There are cheaper substitutes.
You probably need a preamplifier. Frequency range is .05 Hs to about 50 Hz.
Lots of designs on the web.
c&p thanks to Charles Young
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