ADXL335 accelerometer

Discussion in 'General Electronics Chat' started by Dritech, Dec 8, 2013.

  1. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    760
    5
  2. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    5,959
    926
  3. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    760
    5
    In the datasheet I can only see mV/g and not mV/degree
     
  4. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    5,959
    926
    Accelerometers measure force in Gravity mv/g you have to be moving in one of the axis X, Y,Z.

    You need an Inclinometer to measure angular displacement.
     
  5. bertus

    Administrator

    Apr 5, 2008
    16,433
    2,696
  6. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    760
    5
    So it is not possible to monitor the angle with an accelerometer?
     
  7. bertus

    Administrator

    Apr 5, 2008
    16,433
    2,696
  8. BillB3857

    AAC Fanatic!

    Feb 28, 2009
    2,414
    350
    An accelerometer, when placed with the motion axis in a vertical position, will output a value representing 1g, even when stationary. For various angles, use the COS function.
     
  9. sirch2

    Well-Known Member

    Jan 21, 2013
    1,008
    351
    Just to expand on BillB3857's post, with the accelerometer axis vertical you will get an output proportional to +/- 1g. With it horizontal you will get an output proportional to 0g (expect some noise on the output). The output you get when the accelerometer is between horizontal and vertical is related to the angle by the standard trigonometric functions.
     
Loading...