D7S Vibration Sensor From Omron

D7S Vibration Sensor From Omron

Omron announced a new seismic sensor and claims it’s the world’s smallest in size.

D7S sensor is a MEMS 3-axis acceleration sensor featuring OMRON’s unique SI value calculation algorithm, which has a high correlation with the seismic intensity scale that indicates the magnitude of an earthquake and provides higher-precision judgment of seismic intensity scales.

The below diagram describes how D7S works

D7S - Operation Chart
D7S – Operation Chart

The sensor has two open-drain outputs INT1 and INT2. INT1 goes active (low) when shutoff judgment condition and collapse detection condition are met (earthquake level 5 or higher), INT2 goes active (low) during earthquake calculations, offset acquisition and self-diagnostic processing.

I2C is used for communication with the sensor for settings and obtaining earthquake-related information.

D7S - Circuit Diagram
D7S – Circuit Diagram


[Datasheet] – [Product Page]

D7S is a surface-mount compact module with 10.9 × 9.8 mm dimensions. I found the new sensor on Mouser and the price per unit is about $22 (USD) for 1-unit quantity order.

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Embedded Hardware Engineer interested in open hardware and was born in the same year as Linux. Yahya is the editor-in-chief of Atadiat and believes in the importance of sharing free, practical, spam-free and high quality written content with others. His experience with Embedded Systems includes developing firmware with bare-metal C and Arduino, designing PCB&schematic and content creation.

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