The Earthquake Click Board™ is based on the D7S, the world's smallest high-precision seismic sensor from Omron. The Click Board™ is designed to run on either a 3.3V or 5V power supply. It communicates with the target MCU over the I2C interface, with additional functionality provided by the following pins on the MikroBUSline: PWM, INT, CS.
When an earthquake occurs with a seismic intensity equivalent to 5 Upper or higher on the JMA (Japan Meteorological Agency) Seismic Intensity Scale, the D7S will activate the shutoff output to notify the user that an earthquake has occurred.