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Thread: Can Arduino sensors be used with the FB v6?

  1. #11
    Maximum Bitrate Dave One's Avatar
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    Quote Originally Posted by 2k1Toaster View Post
    Yes the inputs are 3.3v.

    And you won't get 3 equal signals on a 3-axis accelerometer when sitting there. You will get 1G in the Z direction and then hopefully 0G in the X and Y just from being idle.
    Good point. Thanks.

    Are there any neat ways to display the movements in RR?

    Cheers,
    Dave

    From my Sony Xperia
    Vauxhall Astra SXi Car PC installed.

  2. #12
    Maximum Bitrate Dave One's Avatar
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    Quote Originally Posted by settra View Post
    yiap.

    GS : the pin which allow's you to select sensitivity (1,5 or 6g). i think low input to that pin, is 1.5g , high is 6g.
    ST: is selft test. ignore it
    SL: sleep mode. in my accelometer, if this pin is not HIGH, it does not work... just sort it with VCC.
    OG: this pin is high, when all 3axis are sensing 0g.

    but dont take my word for it, becouse i can be making a mistake... ALL the information you need, can be found here:
    https://www.sparkfun.com/datasheets/...l/MMA7361L.pdf the datasheet for the chip, this sensor uses... (you anyway need it, to convert voltage to actual "g" )
    Just tried it out . Spot On, Cheers.

    I just have the problem of zero-ing and noise reduction but I have seen a thread on this, so of I go to read it .
    Vauxhall Astra SXi Car PC installed.

  3. #13
    Variable Bitrate
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  4. #14
    Maximum Bitrate Dave One's Avatar
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    X is reading virtually 0G (1.6v), Y is reading virtually 0G (1.6v) and Z is reading 0.4G (1.73v) when held level. I was expecting Z to be 1G so I need to do some reading up.......... Enjoying learning what the Brain can do .
    Vauxhall Astra SXi Car PC installed.

  5. #15
    Variable Bitrate
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    well, 1G is not actually correct anyway. and depending on the design of the sensor, there could be good reasons why its not showing 1G.... there are some other force's , because of earth's rotation, that in macroscopic level don't seem important, but they could affect the sensors readings... but again, you do not care about the "Actuall" force that the sensor is sensing. only the difference in output, in regards to "Zero". i would, just use the "1.73v" as 0G...

    (the 1.6 v on X and Y, are there becouse there ARE forces on those axis too. but they are constant, like gravity, so you should not care, hence the "virtuall zero" )

  6. #16
    Maximum Bitrate Dave One's Avatar
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    I was thinking along similar lines about calling straight and level readings as 0 .

    What app are you using to display the data?

    Cheers,
    Dave

    From my Sony Xperia
    Vauxhall Astra SXi Car PC installed.

  7. #17
    Variable Bitrate
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    e well... i print through serial, all the info i want (Fuel, speed, accel), and then, have a a tablet, mounted as speedometer. i have written an app, to simulate a speedometer, but i dont know , any of-the-shelf solution.. :/

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