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Sparkfun 3-Axis 2468g ADXL345 Accelerometer

Sparkfun 3-Axis 2468g ADXL345 Accelerometer

List price: £16.56  
(£14.35 exc. tax) You save: £2.21 (13%)
Price in points: 2870 points
1.00 g.
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Description: This new version adds 2 standoff holes as well as an extra decoupling capacitor. The ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface. 

The ADXL345 is well suited to measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (4 mg/LSB) enables measurement of inclination changes less than 1.0°.

Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion and if the acceleration on any axis exceeds a user-set level. Tap sensing detects single and double taps. Free-fall sensing detects if the device is falling. These functions can be mapped to one of two interrupt output pins. An integrated, patent pending 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor intervention. Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.


  • 2.0-3.6VDC Supply Voltage
  • Ultra Low Power: 40uA in measurement mode, 0.1uA in standby@ 2.5V
  • Tap/Double Tap Detection
  • Free-Fall Detection
  • SPI and I2C interfaces


Replaces: SEN-09156


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Does the Accelerometer have to use the high speed SPI pins, 11, 12 and 13, or can they be rerouted to other pins? I was interested in using a WAV. Shied with the accelerometer but it does not seem possible as all shields use the SPI pins to talk to the onboard SD card. Either that or does anyone know of a WAV. Shield that does not need the SPI pins?

Asked by Alex B | 30/10/2011, 17:50 | 1 answer(s)

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