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  • Need info about accelerometers..

    silverscorpion

    Member

    Updated: Oct 25, 2024
    Views: 1.0K
    Hi all,
    I need to use an accelerometer for a project. Problem is, I cant find an accelerometer in any of the local electronics shops. Where can I get a good & cheap accelerometer online? Also, what are the types of accelerometers available? I searched online for it and the results included single axis and multi axis accelerometers with 1.5g or 3g capabilities. Wat's this all about??

    Help please!!
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Replies

  • Ashraf HZ

    Member • Mar 6, 2009

    For my projects, our group ordered accelerometers from Sparkfun Electronics:

    #-Link-Snipped-#

    Axis refers to the reference axis in which it is measuring the acceleration along, ie X, Y or Z. So, a single axis means it can only measure along a certain direction and disregard others. A 2 axis accelerometer can measure in two different directions (such as X and Y).

    The "g" means the range of acceleration it can measure relative to freefall. 1 g is equivalent to around 9.8m/s[sup]2[/sup]. So, an accelerometer which has 3g capabilities means it can measure up to an acceleration of 3g (around 30m/s[sup]2[/sup]).
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  • silverscorpion

    Member • Mar 7, 2009

    Thanks for the info ash!!
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  • Ashraf HZ

    Member • Mar 7, 2009

    Your welcome! What kind of project are you working on?
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  • silverscorpion

    Member • Mar 7, 2009

    It's a type of pedometer, which measures the speed with which a person is walking. With some formula based on the weight of the person, i can also calculate the calories spent by the person, and so, it's also a simple calorie meter. A simple project for my medical electronics subject.
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  • Ashraf HZ

    Member • Mar 7, 2009

    Awesome. Keep us updated on it. Good luck!
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  • coolsank

    Member • Mar 9, 2009

    nice dude.. i guess accelerometers aren't used much by hobbyists in india.... i found something that might be useful to you.....

    #-Link-Snipped-#

    I personally haven't worked with accelerometers...but it looks pretty cool...
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  • silverscorpion

    Member • Mar 9, 2009

    Thanks for the link coolsank..
    it's worth a look.
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  • silverscorpion

    Member • Mar 16, 2009

    Got my accelerometer today. Cost me a whopping 2700 INR.
    it's hardly 1 square inch in size, and yet, so costly..

    It's amazing how prices escalate as things are more and more miniaturized..
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  • silverscorpion

    Member • Mar 16, 2009

    oh, and currently, exams are going on, and so I couldn't do any testing with it for another week.
    Then, I've to start with my project.
    I'll keep you updated.
    Do chip in your suggestions too..
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  • morganparkar

    Member • Mar 17, 2009

    Hi Friend,

    An accelerometer is a device that measures the vibration, or acceleration of motion of a structure. The force caused by vibration or a change in motion (acceleration) causes the mass to "squeeze" the piezoelectric material which produces an electrical charge that is proportional to the force exerted upon it.
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  • Ashraf HZ

    Member • Mar 17, 2009

    silverscorpion
    Got my accelerometer today. Cost me a whopping 2700 INR.
    it's hardly 1 square inch in size, and yet, so costly..

    It's amazing how prices escalate as things are more and more miniaturized..
    Awesome!

    Well, sometimes we have to give big sacrifices to see some success in our projects 😉

    There are some factors regarding the prices of advanced devices. I'm thinking prices can be less if whoever manufactures these miniature devices can do so with economies of scale (eg Texas Instruments, Intel, etc). Of course, that requires more machines capable of churning out miniature electromechanical devices.. these arent as common as the normal semiconductor fabrication processes. Another factor is something as mundane as import policies, including taxes. I heard that India prohibits the import of many electronics. Perhaps that might rise up the price up?
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