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1,On-board ADXL345 digital output (support I2C/SPI), low power consumption, compact accelerometer;
2,Support 5V/3.3V voltage input, onboard RT9161 power supply chip, lower voltage drop than 1117, faster load response speed, ideal for high noise power environment.
Faster load corresponding speed, very suitable for high noise power supply environment;
3, commonly used pins have been pinned out, the pin for the standard 100mil (2.54mm), easy to use for dot-matrix boards;
4, PCB board double-sided gold-plated, size: 28 (mm) x 14 (mm)
FEATURES:
Ultralow power: 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)
with FIFO technology minimizes host processor load
Single tap/double tap detection
Activity/inactivity monitoring
Free-fall detection
Supply voltage range: 2.0 V to 3.6 V
I/O voltage range: 1.7 V to VS 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
GENERAL DESCRIPTION
The ADXL345 is a small, thin, ultralow 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 for mobile device applications.
Jcat
Reviewed in the United States on September 7, 2024
These little little accelerometers are great, with one catch I'll get to in a minute. First the functionality is great - with a quick I2C connection and the Sparkfun ADXL345 library, I was immediately able to start gathering measurements, detect the supported special events (tap/double-tap/free-fall), and see which axis is facing up. So, functionally, this chip is great!The one complaint I have is the pin separation (see pics) - while the pitch on each individual row is great for breadboarding, the space between the two rows is really awkward - it's too wide for a single breadboard (only one side would have a column free), and falls in between columns when I join two breadboards side-by-side. I ended up removing one power rail in two side-by-side boards to get this inserted. While I could have simply used dupont connectors, this is one of the very few boards I've used that isn't compatible with a single breadboard. Desoldering may be an option for more permanent integration - there's enough space between the headers and other components that I think it would be relatively simple to remove the pins.In the end, these are inexpensive, but well-performing 3-axis accelerometers with a physical layout that is awkward for prototyping. I will be happy using them, but will very likely modify the boards for easier use.
BRX
Reviewed in the United States on November 5, 2024
As another reviewer mentioned, this is not a great formfactor to use with a breadboard. I like that these do have an onboard 3.3v regulator making it work well with both arduino and ESP boards.I've had fun experimenting with using this to detect taps, and any sort of movement both within the serial plotter and also mapping it to some LED strips, just for fun. I don't have a specific use for these yet, but I'm happy to have them on hand for when I do.The one mark I'm taking off is due to the not breadboard compatible formfactor and the price is just a little higher compared to others you can get, but this one does have the voltage regulator, so this would work better for boards that use 5v natively.
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