The MIKROE-2561 Earthquake click from MikroElektronika features the D7S, the world’s smallest high-precision seismic sensor from Omron. It communicates with the target MCU over I²C interface with additional functionality provided by the following pins on the mikroBUS™ line: PWM, INT, CS. This board is designed to run on either 3.3 V or 5 V power supply. When an earthquake occurs with a seismic intensity equivalent to 5 upper or higher on the Japan Meteorological Agency (JMA) Seismic Intensity Scale, the D7S will activate the shutoff output to notify the user that an earthquake has occurred.

Using the spectral intensity (SI) value, which has a high correlation with the seismic intensity scale that indicates the magnitude of an earthquake, provides higher-precision judgment of seismic intensity scales. The 3-axis acceleration sensor and Omron's unique SI value calculation algorithm achieve high precision and low consumption. Benefits of this sensor include higher degree of freedom for incorporation into devices and prolonged operation on battery power. Shutoff output terminal (INT1) operates equivalent to a conventional mechanical vibration sensor and ensures compatibility with mechanical vibration sensors. Earthquake-related information can be obtained via the I²C interface from external devices.

Omron's D7S seismic sensors are earthquake detection sensors with high detection precision and low electricity consumption through 3-axis acceleration sensors and a unique SI value calculation algorithm. They offer superior cost performance. The D7S can be embedded in essentially any device thanks to its ultra-small size and ultra-low consumption to contribute to package downsizing. They have a SI high-precision earthquake indicator, which correlates highly with damage to structures. Internal memory and I²C interface enable the creation of original applications.