A simple, yet capable, seismometer that teachers can use to instruct the fundamental principles of seismology can be constructed using a Basic Stamp and two Memsic 2125 accelerometers.Each accelerometer has two axes. One accelerometer for the X and Y-axes and one accelerometer for the Z-axis were used in the prototype. The Memsic accelerometers are capable of measuring up to +/- 2 gs with a resolution of about .001 g. Taking into consideration the 32-bit limitation of the Basic Stamp and the 2uS resolution for measuring pulse width, the combo can resolve to around .002 g.
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