# Forum: µC & Digital Electronics Gyroscope / 3D accelerometer

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hi

what is the difference between a 3-axis gyrometer and a 3D
accelerometer?

if i have 3 situations:

1.) my object is lying horizontal on the table, not moving
2.) my object is lying in a angle on the table, not moving
3.) my object is in motion, turning from pos. 2.) to pos. 1.)

could you give me some values for example, which i'd get from a
accelerometer compared to a gyroscope?

im planing to build my own quadcopter. id like to programm it with a
microcontroller (basic knowlage of c and c++ and a lot of motivation ;)
) and the information source of a sensor like one of those.
what do you suggest me to buy?

in addition, if possible, id like to attach my sensor via an i2c-usb
converter to my pc to read out data through math lab.

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Luk am wrote:
> hi
>
> what is the difference between a 3-axis gyrometer and a 3D
> accelerometer?

An accelerometer is meassering acceleration (e.g. 9.81g), a gyrometer
the "spin rate" (a value like "10 degrees per second").

> if i have 3 situations:
> 1.) my object is lying horizontal on the table, not moving

One axis of the accelerometer will show 9.81g (the earth acceleration).
By this you can determine which side is facing the ground.

> 2.) my object is lying in a angle on the table, not moving

Same as above, but accerelation will be split on two axis.
You can determine the ground facing side using trigonometry.

> im planing to build my own quadcopter. id like to programm it with a
> microcontroller (basic knowlage of c and c++ and a lot of motivation ;)
> ) and the information source of a sensor like one of those.
> what do you suggest me to buy?

You'll need both of them.
Please use Google first - there's a whole lot of explanations.

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> One axis of the accelerometer will show 9.81g (the earth acceleration).

The meter will schow 1 g or ca. 9,81 m/s²

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Davis wrote:
>> One axis of the accelerometer will show 9.81g (the earth acceleration).
>
> The meter will schow 1 g or ca. 9,81 m/s²

Of course it will :D
Sorry for causing confusion ^^

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Hi, i am an engineering student, and i am trying to find a source code
for an ADIS16300 on a microcontroller namely MOD5213 by Netburner.  This
ADIS16300 has an integration of a gyroscope and accelerometer.  If you
can help me with this thanks or at least point me in the right
direction.  Thanks.

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