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We have the same issue. Once in a while, the color sensor just stops
sensing green! Faulty sensors?

On Tue, Nov 11, 2014 at 7:07 AM, Skip Morrow <[log in to unmask]> wrote:

> Wow. Add us to the list of teams with color sensor issues this past
> weekend. Many of our missions relied on the sensor, and had been working
> nearly perfectly in team practices.
>
> When we got to the tournament, we did pretty good on our practice round.
> But then for round 1 no missions worked. We hadn't changed anything, so we
> were puzzled. Back in the pit, we troubleshot and troubleshot. We could
> tell that the sensor was changing from color mode to light intensity mode
> for no apparent reason. You should see a blue-ish light coming from the
> sensor when it is in color mode. A reddish light indicates light intensity
> mode. Depending on the settings of the wait block, the sensor should
> automatically select the correct mode. Well, ours would spontaneously
> switch over to light intensity mode, even though we never use light
> intensity.
>
> Round two came and went and we got lucky on one mission. We still had not
> figured out what was going on. Finally, we tried our backup robot. And
> everything worked perfectly. 100%. It just never occurred to us that we
> could be facing a hardware issue.
>
> For round three we went to the table and all of our missions worked.
>
>
> .
>
> On Mon, Nov 10, 2014 at 6:35 PM, Monson Gmail <[log in to unmask]>
> wrote:
>
>> Jill,
>>
>> We had a similar issue with color sensor, but we build a shield around
>> the sensor and the issue was resolved. We researched and found this
>> solution.
>>
>> Thanks,
>> Monson
>> Rookie coach of Future Geekbots
>>
>>
>> On Nov 10, 2014, at 6:23 PM, Jill Hamilton <[log in to unmask]>
>> wrote:
>>
>>  Amy, thanks for sharing.  We found this too.  Our EV3 color sensor
>> wouldn’t read green.  We realized it was too close to the table.  I am
>> curious what you learned during the competition that helped.
>>
>>
>>
>> Thanks
>>
>> Jill Hamilton
>>
>> Coach of Cyborg Piñata 3335
>>
>> Coach of the Mechanical Manatees
>>
>> Coach of the Electric Pineapples
>>
>>
>>
>> *From:* First Lego League in Virginia and DC [
>> mailto:[log in to unmask] <[log in to unmask]>] *On
>> Behalf Of *Amy Nichols
>> *Sent:* Sunday, November 09, 2014 10:15 AM
>> *To:* [log in to unmask]
>> *Subject:* [VADCFLL-L] Thank you!
>>
>>
>>
>> I want to offer a huge thank you from The Ruling Robot Falcons to Karen
>> Berger and all the organizers, judges, referees, and volunteers that helped
>> put on the regional tournament in Newport News yesterday.  Our kids had
>> such a fun time and I appreciate all the work that was put into it!  I
>> think the referees were cheering for all the kids as much as the coaches
>> were!  Thank you all!
>>
>>
>>
>> I also want to add a note about real Gracious Professionalism that
>> happened for our team yesterday.  When we arrived at the school yesterday
>> and our kids ran their robot on the practice boards, they discovered that
>> nothing on their robot worked.  All their missions were dependent on the
>> color sensor, which had was only randomly seeing certain colors.  They
>> tried everything they could think of to fix it, but then got the idea to
>> see if the other teams that had EV3's could help.  So they went around the
>> room asking other teams if they had any ideas or knew how to calibrate a
>> color sensor (one of the things they thought perhaps was wrong).   The
>> other teams all stopped what they were doing to help our kids try to
>> problem solve and help think of what could be wrong.  It was very apparent
>> that these kids were not just there to win a tournament...but they really
>> loved being there and wanted to help.  This just made me love FIRST/FLL
>> even more than I already did, and realize just how great this organization
>> is!
>>
>>
>>
>> Thank you all!
>>   ------------------------------
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