MIKROE-2561

Earthquake click PID: MIKROE-2561 Weight: 30 g Earthquake click carries D7S, the world’s smallest high-precision seismic sensor from Omron. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target MCU over I2C interface, with additional functionality provided by the following pins on the mikroBUS™ line: 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. How it works Using the SI (spectral intensity) 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. (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. I2C interface is able to obtain earthquake-related information from the sensor with communications from external devices. Spectral intensity The SI value (or spectral intensity) is equivalent to the magnitude of the destructive energy imposed by seismic motion on structures. Low power consumption The power consumption during standby is 90 μA or less. On average, during processing, the sensor uses around 300 μA. JMA seismic intensity scale JMA or Japan Meteorological Agency intensity scale is used in Japan and Taiwan to measure the intensity of earthquakes. The scale goes from 0 to 7. The level 5 on this scale indicates when objects inside a house start falling down, like books from the shelf, dishes in a cupboard, cracks are formed on walls, etc. Key features    D7S seismic sensor   o 90 μA power consumption in standby  o Acceleration Detection Range −2,000 to 2,000 gal  o Shutoff Output (INT1) Output at seismic intensity level 5 or higher  I2C interface  3.3V or 5V power supply  Specification  Product Type Motion Vibration sensor, fire prevention systems, electricity meters, gas meters, Applications chemical plants, bridges, tunnels, etc. MCU D7S seismic sensor Low power consumption, Acceleration Detection Range −2,000 to 2,000 gal, Key Features Shutoff Output (INT1) Output at seismic intensity level 5 or higher Key Benefits The click can calculate seismic activity and detect an earthquake Interface I2C Power Supply 3.3V or 5V Compatibility mikroBUS Click board S (28.6 x 25.4 mm) size  Pinout diagram This table shows how the pinout on Earthquake click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes    Pin  Pin Notes  mikroBUStm  Not connected  NC  1  AN  PWM 16 INT2 Processing notification output  Not connected  NC  2  RST  INT  15 INT1 Shutoff output  Initial setting input  SETTING  3  CS  TX  14 NC Not connected  Not connected  NC  4  SCK  Not connected  NC  5  MISO  SCL  12 SCL I2C clock  Not connected  NC  6  MOSI  SDA 11 SDA I2C data  Power supply  +3.3V  7  3.3V  RX  13 NC Not connected  5V  10 +5V Power supply  Ground  GND  8  GND  GND 9 GND Ground  Maximum ratings Description  Power Supply Voltage  Min Typ Max Unit ‐0.3 6.0 V  Average Current Consumption during Processing 300 uA    Operating Temperature    ‐30 ‐  70  C  Jumpers and settings Designator  Name  JP1  Default  Position  PWR.SEL.  Left  Default  Option  3.3V  Description:  Power Supply Voltage Selection 3.3V/5V, left position  3.3V, right position 5V  Programming Code examples for Earthquake click, written for MikroElektronika hardware and compilers are available on Libstock. Code snippet The following code calls initialization functions, and then checks the status and SI value registers every 5 seconds. 01 void main(){ 02 03 system_init (); 04 eq_init(0x55); 05 06 while (1) 07 { 08 UART_Write_Text( "rn Status: " ); 09 si_value = eq_read_status (); 10 IntToStr( si_value, uart_text ); 11 UART_Write_Text(uart_text); 12 UART_Write( 32 ); 13 14 /*reads strongest SI value detected during current quake */ 15 UART_Write_Text( " Current SI value: " ); 16 si_value = eq_si_rs (); 17 IntToStr( si_value, uart_text ); 18 UART_Write_Text(uart_text); 19 UART_Write( 32 ); 20 21 Delay_ms (5000); 22 } 23 }                                         https://shop.mikroe.com/click/sensors/earthquake 4/5/17