Adafruit
ADXL345 - Triple-Axis Accelerometer (+-2g/4g/8g/16g) w/ I2C/SPI
The ADXL345 from Analog Devices is a triple-axis digital accelerometer with both I2C and SPI interfaces. This breakout board includes an on-board 3.3V regula...
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The ADXL345 from Analog Devices is a triple-axis digital accelerometer with both I2C and SPI interfaces. This breakout board includes an on-board 3.3V regulator and logic-level shifting, making it easy to interface with any 3.3V or 5V microcontroller including Arduino.
Measure acceleration across three axes (X, Y, Z) with selectable sensitivity ranges of ±2g, ±4g, ±8g, or ±16g. Lower ranges provide finer resolution for slow movements, while higher ranges are suited for high-speed motion tracking.
Key Features
- Triple-Axis Measurement – X, Y, and Z acceleration sensing
- Selectable Range – ±2g, ±4g, ±8g, or ±16g sensitivity
- Dual Digital Interface – I2C and SPI supported
- On-Board Regulator – 3.3V regulator with output pin, accepts up to 5V input
- Logic-Level Shifting – Works with both 3.3V and 5V microcontrollers
- Mounting Holes – Two 2.5mm (0.1") holes for easy attachment
Ideal For
- Motion and tilt sensing projects
- Vibration monitoring and impact detection
- Robotics and vehicle tracking
- Arduino and microcontroller-based projects
Package Contents
- 1× ADXL345 triple-axis accelerometer breakout (fully assembled and tested)
- 1× 9-pin 0.1" standard header strip
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 3.3V regulator
- A 3.3V regulator is a power circuit that provides a steady 3.3 volts for parts that need that supply voltage. On a breakout board, it can let the sensor run safely even when the connected microcontroller or power source uses a higher voltage.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- logic-level shifting
- Logic-level shifting converts digital signals between different voltage levels, such as 3.3V and 5V. It lets devices connect safely to microcontrollers and peripherals that use different logic voltages without damaging either side.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
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Sensors & Input
Related Tutorials
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