This is because you use the home edition of the EV3 software.

This article describes how to add the gyro and ultrasonic sensor to the
home edition:
http://robotsquare.com/2014/06/25/tutorial-gyro-ultrasonic-sensor-ev3-home-edition/

On Wed, Jan 7, 2015 at 3:47 PM, Kathleen Walsh <[log in to unmask]>
wrote:

> I don't know if you can help me, but our team has recently purchased a
> gyro.  We would like to discover how this sensor works, but the programming
> folder on the EV3 programming pallet does not have a gyro sensor.  Can you
> help?  Is there an update that I need to make?  Thanks for your help!
>
> Team:  STARS
>
> On Mon, Nov 10, 2014 at 9:08 PM, Naren Botlaguduru <[log in to unmask]
> > wrote:
>
>> First of all thanks to this community for clarifying lot of questions.
>> Great work.
>>
>> We are using Gyro sensor this year and understand about the Drift.
>>
>> We tried following but still Robot sometimes just spins....
>>
>> 1. Kids are resetting the sensor before every program and also couple of
>> times in the program.
>> 2. Compare is set to equal to rather than Greater than Equal to or Less
>> than equal to as those both options didn't work for us.
>> 3. We are also deducting some drift value to get right angle value.
>> 4. Kids are using a very slow power to do the turns.
>>
>> But still the program that works one day is not working another day due
>> to the Gyro sensor keeps on rotating sometimes. Kids are restarting the
>> Robot when they see that but still not helping.
>>
>> Any tips and tricks to solve this will be a great help. Is there firmware
>> or something that need to be done so that Gyro sensor doesn't give us that
>> drift and gives perfect angle stop.
>>
>> Thanks in advance for any help with Gyro Sensor.
>>
>>
>> --
>>
>> Thx
>> Naren
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>
>
>
> --
> *Peace,*
> *Kathleen Walsh, M.Ed.*
>
>
> *Middle School TeacherSt. Thomas Aquinas Regional School*
> 2011 Blue Ribbon School of Excellence
>
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