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Topic starter
2025-11-24 8:02 pm
Yesterday I saw a video with the LSM303AGR. I was wondering if you could make a seismograph device with this chip. Has anyone tried this yet, or made one using another chip?
2025-11-24 8:59 pm
I think you would find that the LSM303AGR wouldn't be sensitive enough to serve as an accurate seismograph. While it does indeed pick up tiny vibrations, it works best with local sources (i.e, hitting your hand on the table).
Seismographs require ultra-low-noise sensors to detect movements several kilometers (or several hundred kilometers) away. Most commercial ones use a sensor called a "geophone", Sparkfun used to sell one, and some people have even made their own.
If you want to try an accelerometer, you might consider the Adafruit ADXL335, which offers higher sensitivity than the LSM303AGR. These have been used in networks to detect local earthquakes. Note that this is an analog sensor; you would need some op-amps to amplify the three outputs so you could feed them to the analog inputs of your microcontroller.
😎
Bill
"Never trust a computer you can’t throw out a window." — Steve Wozniak
Topic starter
2025-11-25 7:08 am
@dronebot-workshop Thank you Bill. This is very helpful. I am going to check this out.