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ADXL345 3-Axis Accelerometer Module
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The ADXL345 module is a low-power, digital 3-axis accelerometer designed to measure acceleration, tilt, motion, and vibration along the X, Y, and Z axes. Built around the ADXL345 sensor from Analog Devices, this module is suitable for motion-sensing projects, orientation detection, robotics, embedded systems, and wearable electronics.
The ADXL345 accelerometer supports I²C and SPI communication, making it compatible with development platforms such as Arduino and Raspberry Pi, as well as other microcontrollers that support these interfaces. The breakout board includes voltage-level conversion circuitry for interfacing with compatible 3.3V and 5V logic systems. Check the board's pinout and operating-voltage specifications before connecting it to your controller.
With selectable measurement ranges of ±2g, ±4g, ±8g, and ±16g, this 3 axis accelerometer module can be configured for different motion-sensing requirements. Its high-resolution measurement capability helps detect small changes in orientation, while configurable output data rates support applications ranging from slow tilt monitoring to faster motion tracking.
The ADXL345 also provides built-in single-tap, double-tap, activity, inactivity, and free-fall detection. These features make it useful for gesture-controlled devices, impact monitoring, motion-activated systems, and fall-detection prototypes. Whether you are developing an Arduino motion sensor project or integrating acceleration data into an embedded application, the ADXL345 module offers a compact solution for measuring movement in three dimensions.
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One of the standout features of the ADXL345 accelerometer is its built-in motion detection logic, which can trigger interrupts without constantly polling the microcontroller.
Free-fall is detected when the acceleration on all three axes drops below a specific threshold (typically around 0.5g) for a set duration. This is highly useful in drone safety systems or drop-detection for portable electronics.
// Example: Configuring Free-Fall Detection on ADXL345
// Threshold = 600mg (0.6g), Time = 100ms
adxl.setFreeFallThreshold(0.6);
adxl.setFreeFallDuration(100);
adxl.setFreeFallPinInterrupt(true);
// In your loop(), check for the interrupt:
if (adxl.triggered()) {
Serial.println("Free Fall Detected!");
// Trigger safety mechanism or save data
}
Note: This module also supports single and double-tap detection, perfect for wearable tech and gesture-controlled interfaces
| Supply Voltage | 3.3 V/ 5V |
| Interface Type | I2C, SPI |
| Sensing Range | ±2g, ±4g, ±8g, ±16g |
| X | 28.6 LSB/g |
| Y | 31.2 LSB/g |
| Z | 34.5 LSB/g |
| Dimensions | 3 x 2 x 1cms |
| Weight | 5 grams |
The ADXL345 is a small, thin, ultralow power 3-axis accelerometer capable of measuring up to 16 g with high resolution (13-bit). Digital output data is in 16-bit two's complement format and can be accessed via an SPI (3- or 4-wire) or I2C digital interface.
To connect an ADXL345 with Accelerometer follow the steps mentioned below:
No, ADXL345 is a 3-axis accelerometer that senses both static acceleration (due to gravity) as well as dynamic acceleration (due to motion or shock). So, it can be used as a tilt sensor or to detect free fall.
ADXL345 has a measuring range between ±2g and ±16 g. The sensor has an accuracy angle measurement of less than 1° and power consumption of about ten times less than the ADXL335 version when it is in sleep mode. The ADXL345 is a digital sensor that uses the I2C or SPI digital protocols to return values.
Yes. The ADXL345 has built-in single-tap, double-tap, and free-fall detection functions. It can also detect activity and inactivity. These functions can be configured through its registers, and detection events can be mapped to interrupt outputs to notify a connected microcontroller.
The ADXL345 supports four selectable acceleration ranges: ±2g, ±4g, ±8g, and ±16g. Lower ranges are useful for measuring smaller accelerations with greater sensitivity, while higher ranges allow the sensor to measure stronger acceleration without exceeding its selected range.
Yes. The ADXL345 supports I²C and SPI, which can be used with compatible Raspberry Pi interfaces. Before connecting the module, verify the breakout board's voltage requirements and ensure that the wiring and communication settings match your Raspberry Pi configuration.
Yes. The ADXL345 can measure static acceleration due to gravity, allowing tilt and orientation changes to be estimated. For accurate orientation tracking during dynamic movement, additional processing and, in some applications, gyroscope data may be required.
The ADXL345 supports highly flexible output data rates ranging from 10Hz (for low-power battery applications) up to 3200Hz (for high-speed impact or vibration monitoring).
ADXL345 Accelerometer Module
ADXL345 Accelerometer Module
ADXL345 Accelerometer Module
it is working without issues
Technical support provided detailed instructions for setup and troubleshooting, which helped me integrate the module quickly.
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