“Easy to build and cheap sensitive Arduino seismometer
Otherwise, the seismometer itself consists of two parts, a mechanical tremor detector, and an electronic part that turns these tremors into electrical signals, amplified them and converts them into digital signals, which we can then visually monitor on the PC data logging software.
To convert the tremors into electrical signals, a permanent magnet is used as a movable part and a solenoid with many windings for turning the magnet moves into electrical signals. In this particular case, I used the primary winding of a small mains transformer with a power of 1.8 W and a resistance of 1.2 kOhms. At This coil is a glued aluminum plate, which has the function to dump the oscillations of the moving magnet called the “Lentz effect”.”