SKU: 99318957130

GY-291 ADXL345 3-Axis Accelerometer

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Description

GY-291 ADXL345 3-Axis AccelerometerGY 291 ADXL345 3 Axis Accelerometer he GY 291 module contains an ADXL345 accelerometer IC. This small, thin, ultralow power, 3 axis accelerometer has a high resolution (13 bit) measurement with adjustable range 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. This module measures the static acceleration of gravity in tilt sensing applications, as well

GY-291 ADXL345 3-Axis  Accelerometer

he GY-291 module contains an ADXL345 accelerometer IC. This small, thin, ultralow power, 3-axis accelerometer has a high resolution (13-bit) measurement with adjustable range 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.

This module measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. With high resolution (4 mg/LSB) output, it enables measurement of inclination changes less than 1.0°. Several special sensing functions are provided by the IC. Activity and inactivity sensing detect the presence or lack of motion by comparing the acceleration on any axis with user-set thresholds. Tap sensing detects single and double taps in any direction. Freefall sensing detects if the device is falling. These functions can be mapped individually to either of two interrupt output pins. An integrated, patent pending memory management system with a 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption. Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.


Specification:

Ultralow power IC: as low as 23 µA in measurement mode and 0.1 µA in standby mode at VS = 2.5 V (typical)
Power consumption scales automatically with bandwidth
User-selectable resolution
Fixed 10-bit resolution
Full resolution, where resolution increases with g range, up to 13-bit resolution at ±16 g (maintaining 4 mg/LSB scale factor in all g ranges)
Patent pending, embedded memory management system with FIFO technology minimizes host processor load
Single tap/double tap detection
Activity/inactivity monitoring
Free-fall detection

  • Module supply voltage range: 4.0 V to 6 V
  • I/O voltage range: 1.7 V to 3.6V
  • SPI (3- and 4-wire) and I2C digital interfaces
  • Flexible interrupt modes mappable to either interrupt pin
  • Measurement ranges selectable via serial command
  • Bandwidth selectable via serial command
  • Wide temperature range (−40°C to +85°C)
  • 10,000 g shock survival
Shipping Notes
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  • Delivery to the USA:
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 99318957130

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Starr Charles
Bozeman, US
★★★★★ 5
These hold up very well
Color: White, Size: Standard (Pack of 2)
I have NO luck with pillows. I’ve been in stores & tried them. They seemed ok there. At home, nope. I’ve been getting headaches & neck aches from lousy pillows. I’ll change one, a few nights relief. It doesn’t help that I’m prone to headaches. After reading about different pillows, I settled on these. The reviews were better than so many different ones I was looking at. Including high priced & brand names. I bought the standard size. When I saw, “Customers Usually Keep This”, I kept my fingers crossed. When I received them, I took one out of the package & put my head on it & thought, oh no! This is too hard! I tried it again. Ok….. I slept on it & haven’t had any pains since. It’s soft but firm enough to keep my head from sinking & messing up my neck. I don’t move. No more flipping my pillow over. My head doesn’t go below my neck anymore! This has been 2 months now, but it hasn’t changed at all. I wake up happy, not complaining. No more pains or headaches. This saved me from losing days with a heating pad or an ice pack. The price was excellent for 2 pillows. I can’t believe a blind buy was the answer! These are incredible. Finally, something worked for me.
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Reviewed in the United States on May 13, 2026
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Xander King
Dallas, US
★★★★★ 5
Awesome Pillows!
Color: White, Size: King (Pack of 2)
These pillows are super soft! I love them. I bought them when I caught a bad cold and needed to prop myself up. Worked so great! Definitely give these pillows a try. They're very reasonably priced too.
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Reviewed in the United States on May 29, 2026
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SadSushi
Belleville, US
★★★★★ 5
Comfortable
Size: Standard (Pack of 2), Style: Medium, Configuration: Hometextile
Fluffy and of good quality.
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Reviewed in the United States on May 1, 2026
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Isabella
Battle Creek, US
★★★★★ 5
Fluffines
Size: Standard (Pack of 2), Style: Medium, Configuration: Hometextile
I am very happy with this Down Alternative Pillow! It is soft, comfortable, and provides great support for my head and neck
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Reviewed in the United States on June 2, 2026
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Ryan J
Massapequa, US
★★★★★ 4
Inexpensive and Nice Quality
Size: Standard (Pack of 2), Style: Medium, Configuration: Hometextile
I was hoping there would be more of a firmness to these pillows, however they are more soft than I was expecting them to be. Id recommend these pillows for someone who wants a fairly non firm pillow.
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Reviewed in the United States on January 18, 2026

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