Description: Breakout board for the low power, single axis ADXL193 MEMS accelerometer. The ADXL193 is a high-g sensor with a full scale range of ±250g! The ADXL193 can be powered from 3.5-6V. Access to the self-test pin is also provided.
Note: The ADXL193 outputs an analog voltage. This voltage is in ratio to the measured acceleration and to the supply voltage. You will need some extra hardware to convert this analog signal to a usable digital one. Luckily, many uCs have a built in Analog to Digital converter.
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A student of mine needed to measure deceleration of a falling object for a science project. Common accelerometers did not have the required range but the SparkFun ADXL-193 was perfect. It is so light weight it was mounted on a small wood block to align the sensitive axis with the force and since it is very low power it could be operated with a small 4.8 volt rechargeable battery. The analog output went to a digital oscilloscope over a thin flexible coax cable and the impact data was captured. The breakout board made it easy to mount and to make connections. It is a very useful device for physics/mechanics projects.
If you feel like firing your project from a cannon… directly into a brick wall… then this is the sensor for you! Seriously though, I have yet to find an application that will really test this little guy (that won’t just obliterate whatever it’s attached to)
that said it’s great for impacts and stuff, just don’t expect pinpoint precision. The sensor covers a 500g range (+/- 250g), so small changes in acceleration may be harder to detect. I recommend pairing this with a high-precision ADC.
This little accelerometer is great! Just what i was looking for. Works well, really robust and good support from the datasheet, too! It’s really nice that it can be setup and just run while you attend to other parts of your project, knowing this device is gonna do it’s thing and do it well! It also shipped and arrived quickly, too. Thanks, SparkFun! :D :D
This is a high-G accelerometer. It won’t be too accurate if you use Earth’s gravity to calibrate this sensor like the other low-G accelerometers on our site. The best would be to use some specialized equipment to calibrate the sensor with a microcontroller. Otherwise, you can drop this sensor and the microcontroller at a certain height and calculate the amount of G’s the acceleromter is supposed to read. You would need to make sure that the electronics are not damaged from the drop. Maybe mount the sensors in a helmet or box and drop it on a soft surface (like a cushioned mat). It would be good to record the data with an OpenLog.