A seismometer in a seismograph system

This is a home made electronic seismometer. The seismometer is made up of an Arduino Duemilanove microcontroller, a red/green/blue LED, Analog Devices ADXL345 accelerometer, wires and resistors. It is hooked up to my computer to create graphs of the seismometer moving.

My web site http://www.centralnexus.com/seismograph/ has more ongoing details on this subject.

Category:

Howto & Style

Tags:

• Seismograph
• v1

[pimohdaimaoh]

but the problem is how can you get its P & S waves and how can you calculate its magnitude since there is no sampling to get from it? since your helocoder doesnt have filters and extraction for its waves?

[BlackDiamond1138]

@pimohdaimaoh Unfortunately I'm not sure what you mean by "helocoder". The major search engines return no results for it. As far as analysis, that's where you need a real analysis program. You would normally need to convert the acceleration data to a SAC, MSEED or a similar format to analyze each event.

I also created an improved seismometer that is more sensitive with a BMA180 accelerometer, which can automatically filter out the higher frequencies. My other video and web site shows that.

[MtwoJ]

This is great! I'm trying to build something similar for a school project - could you please make a how-to video for this? Or at least share the source code and a circuit diagram?

Thanks!

[BlackDiamond1138]

@MtwoJ I'll see what I can do this weekend. I've improved the project since I first worked on it, and it's actively recording. In case you're interested, you can see the latest results from here: centralnexus . com / seismograph /

It hasn't recorded an earthquake, but it has recorded misreads and things going thump in the garage.

[BlackDiamond1138]

@MtwoJ I updated my web site with some pictures and some source code. Follow the details link to get more details. I hope it helps.

[Cloroethyl]

what's the yellow line? combined?

[BlackDiamond1138]

Yes. The red and green lines (x and y) were fluctuating enough to appear separate on the screen by one to two pixels, but the camera's low resolution combined those lines so that it appears yellow.

[yosabzzrulezz]

oh my dammit i hate science

[pimohdaimaoh]

i mean HELICORDER sorry for my last spelling thought im refering this because every seismic data needs to be recorded in helicorder, this is important to monitor events im only refering this seismo in this video only but as you said it needs a real analysis software so maybe this is only your illustration so keep it up im currently building my own here in the philippines because you know our country is at the edge of CHAIN of FIRE, i should have my own to monitor them

[MtwoJ]

@BlackDiamond1138 Great, thanks a lot! 

[MtwoJ]

@BlackDiamond1138 Amazing - Thanks for your help! And the results of your seismometer look great!

I'm trying to capture very subtle vibrations, so if you can also show how to adjust the sensitivity/amplitude of the graph, etc. I would really appreciate it!