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by tringwebdesign
Sat Jul 07, 2018 5:10 am
Forum: Automation, sensing and robotics
Topic: Raspi-powered seismometer/seismograph
Replies: 63
Views: 38691

Re: Raspi-powered seismometer/seismograph

Seems the Cirrus Logic card has a high pass filter that cuts in at 20Hz and up . The Audio Injector card also needs some fiddling with electronics to get the desired capture. I think to get anything meaningful off the Lego device it needs to be paired with a digitizer capable of capturing the right ...
by tringwebdesign
Wed Jun 27, 2018 5:55 am
Forum: Automation, sensing and robotics
Topic: Raspi-powered seismometer/seismograph
Replies: 63
Views: 38691

Re: Raspi-powered seismometer/seismograph

Don't know about that. The device is now working on the audio card and it can pick up local traffic movements . I am saving the readings from the device as a WAV audio file via arecord every 24 hours, results in a 1.9GB file arecord -c 1 -f S16_LE -r 11025 --max-file-time 86400 --use-strftime %Y-%m-...
by tringwebdesign
Thu Jun 21, 2018 7:19 pm
Forum: Automation, sensing and robotics
Topic: Raspi-powered seismometer/seismograph
Replies: 63
Views: 38691

Re: Raspi-powered seismometer/seismograph

Thought I would chime in on this thread, as I am also interested in seismology but from a different perspective, measuring local HGV traffic movements and the potential effect on surrounding (old) structures. I started out with the Mindsets slinky attached to a Pi B+ with a Cirrus Logic Audio Card a...

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