Gyros and accelerometers

Discussion in 'General Electronics Chat' started by tornado151, Aug 22, 2010.

  1. tornado151

    Thread Starter Member

    Apr 15, 2010
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    Hi,
    What is the difference between a gyro and accelerometer?

    I believe that they can both detect rotation?

    Which is the most accurate?

    Thanks
     
  2. hspalm

    Active Member

    Feb 17, 2010
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    An accelerometer detects acceleration force, and does not have to be multi-dimensional. This means it can detect something like how hard you swing or "accelerate" a device, like in a nintendo wii control. A gyroscopes main purpose is what you said, to detect which dimension a device is leaning, sort of speak.
     
    tornado151 likes this.
  3. tornado151

    Thread Starter Member

    Apr 15, 2010
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  4. big5824

    New Member

    Jul 15, 2010
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    gyros detect the rate of change of angle, which you then integrate to find the angle.
     
  5. marshallf3

    Well-Known Member

    Jul 26, 2010
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  6. SgtWookie

    Expert

    Jul 17, 2007
    22,182
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    Take a look at MEMS motion sensors. A couple of example part numbers are LIS3L06AL, LIS33DE, both can sense motion in all 3 axis. You'd need to use a microcontroller to interface with them.

    If that looks too difficult, Radio Shack stores generally stock a 2-axis accelerometer for around $33: http://www.radioshack.com/product/index.jsp?productId=2909788
    You'll still need a uC or other circuitry to get the data out of it.

    The missile rate gyro Marshallf3 linked to could work, but be aware that you will need one complete circuit & gyro per axis to be tracked, and they will have to be physically linked together.
     
  7. BMorse

    Senior Member

    Sep 26, 2009
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  8. tornado151

    Thread Starter Member

    Apr 15, 2010
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  9. BMorse

    Senior Member

    Sep 26, 2009
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    If you want to directly connect it to a PC you will need a I2C to Serial adapter or similar circuit (similar to these >> http://www.i2cchip.com/).... since the module requires a I2C connection to a processor...

    B. Morse
     
  10. tornado151

    Thread Starter Member

    Apr 15, 2010
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