Seismometers are instruments that measure motion in the ground, like the shaking produced by earthquakes. This seismometer is great for the amateur geologist because it is made from a few easy-to-find parts. Its design (based on a project found here) uses the electromagnet found in a typical audio...By: 10DotMatrix
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from Instructables: exploring - technology - robots http://ift.tt/1y8QSKK
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