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A few days ago I went to get components for a project I was building. and came across a 3-axis accelerometer. So I decided to test it and make a post to give you an idea of things work and how you can use it. ADXL 355                   The accelerometer I have is ADXL 355 v2.0 board. there is are 5 headder pins, ground, 5V supply, X-axis output,Y-axis output and Z-axis output. It is quite compact. The one I have measured around 15mm x 15mm. These sensors are low cost. And can be incorporated in Projects or robots we build. The ADXL 355 board I have has an onboard Red led (smd) for the indication of power. The accelerometer has a wide range of applications. ADXL 355 is a basic accelerometer which gives analog values for all the three axis depending upon the position of the IC. ADXL 345 is an advanced accelerometr which can detect free-fall,activity,tap,double tap and communicates via I2C. The ADXL is a a ultra-lowpower as it consumes only 25 uA in measurement mode. the ADXL 355 IC alone