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ManualsBrandsSeeedStudio ManualsElectronic Experimentation PartsGrove ±16g Triple Axis Accelerometer (ADXL345)

RB-See-224

SeeedStudio Grove ±16g Triple Axis Accelerometer (ADXL345)

Based on the excellent ADXL-345, this digital 3-axis accelerometer has excellent EMI protection. Its

variable output makes it suitable for a wide range of applications:

 HDD shock protection

 Vibration sensor

 Game controller input

 Robotics

 Smart vehicles

 Anywhere you need to obtain motion-sensing & orientation information.

The excellent sensitivity (3.9mg/LSB @2g) provids high-precision output up to ±16g.

The sensor is utilizes a 4-pin Grove interface (3-5VDC) for easy connectivity with your standard Arduino

device or Seeed Stalker.

Features

 Wide power range DC3V to 5V

 Grove module

 3 axis sensing

 I2C digital interface

 High sensitivity

 Small, low-profile package: 14-Terminal LGA

 Low power 0.1 μA in standby mode at VS = 2.5 V (typical)

 10,000 g shock survival

 RoHS/WEEE lead-free compliant

Summary of content (5 pages)

PAGE 1
RB-See-224 SeeedStudio Grove ±16g Triple Axis Accelerometer (ADXL345) Based on the excellent ADXL-345, this digital 3-axis accelerometer has excellent EMI protection. Its variable output makes it suitable for a wide range of applications:  HDD shock protection  Vibration sensor  Game controller input  Robotics  Smart vehicles  Anywhere you need to obtain motion-sensing & orientation information. The excellent sensitivity (3.9mg/LSB @2g) provids high-precision output up to ±16g.
PAGE 2
Application Ideas  Motion Sensor  Shock detector  Vibration sensor  Toy car  Robotics  Disk drive Shock Protection  Game Controller Cautions Notice: Before you got this sensor, we have tested it to ensure that the sensor is working right. Sometimes there might be a small offset of the sensor, but it is within the acceptable error range. You can set the offset register according to the chip's datasheet to regulate the sensor. Warning: wrong operation can cause danger.
PAGE 3
Programming //Arduino 1.0+ Only! //Arduino 1.0+ Only! #include #include ADXL345 adxl; //variable adxl is an instance of the ADXL345 library void setup(){ Serial.begin(9600); adxl.powerOn(); //set activity/ inactivity thresholds (0-255) adxl.setActivityThreshold(75); //62.5mg per increment adxl.setInactivityThreshold(75); //62.5mg per increment adxl.
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//look of tap movement on this axes - 1 == on; 0 == off adxl.setTapDetectionOnX(0); adxl.setTapDetectionOnY(0); adxl.setTapDetectionOnZ(1); //set values for what is a tap, and what is a double tap (0-255) adxl.setTapThreshold(50); //62.5mg per increment adxl.setTapDuration(15); //625μs per increment adxl.setDoubleTapLatency(80); //1.25ms per increment adxl.setDoubleTapWindow(200); //1.25ms per increment //set values for what is considered freefall (0-255) adxl.
PAGE 5
//getInterruptSource clears all triggered actions after returning value //so do not call again until you need to recheck for triggered actions byte interrupts = adxl.getInterruptSource(); // freefall if(adxl.triggered(interrupts, ADXL345_FREE_FALL)){ Serial.println("freefall"); //add code here to do when freefall is sensed } //inactivity if(adxl.triggered(interrupts, ADXL345_INACTIVITY)){ Serial.println("inactivity"); //add code here to do when inactivity is sensed } //activity if(adxl.