We discovered that the area of the green line where there is a large grey circle has been the issue. For some reason, the sensor seems to have some problems differentiating between green and grey when there is a lot of grey around. On Wed, Nov 12, 2014 at 8:50 AM, Frank Levine <[log in to unmask]> wrote: > With our Robot, we can put the sensor directly over the green line and > watch it flip back and forth between Green and White. I'm guessing that > the color that FLL used on the mats is not exactly "Lego Green", or that > the slightly shinier material this year is causing the sensor to get > confused on green. We have no issues with red or black... just green. Our > solutions don't rely on the green lines because it just wasn't reliable. > > -Frank > > On Wed, Nov 12, 2014 at 6:24 AM, Neelam Kadam <[log in to unmask]> wrote: > >> Try slowing the robot down. >> >> Sent from my iPad >> >> On Nov 11, 2014, at 11:41 PM, Mssuchitra Suchitra <[log in to unmask]> >> wrote: >> >> I am glad to see this email thread on color sensor issues. >> >> First of all, thanks a lot for all the tips and suggestions we get >> through this email distro. It has been very helpful for us. >> >> We are having similar issues with the color sensor as well. Our robot is >> able to identify the green color when it is on a straight line movement, >> but having difficulty identifying the green color when the robot is on >> rotational circular movement. I am guessing that the color intensity >> changes very quickly when it is on rotational movement, there by causing >> the difficulty in the robot sensing the green color. >> >> Any suggestions on how we could resolve the same ? >> >> Thanks >> Suchitra >> On Nov 11, 2014 8:01 AM, "Lloyd O'Hara" <[log in to unmask]> wrote: >> >>> sounds like there will be some more color sensors in our near future. >>> Thanks >>> >>> ----- Original Message ----- >>> *From:* Neelam Kadam <[log in to unmask]> >>> *To:* Lloyd O'Hara <[log in to unmask]> >>> *Cc:* <[log in to unmask]> >>> <[log in to unmask]> >>> *Sent:* Tuesday, November 11, 2014 7:57 AM >>> *Subject:* Re: [VADCFLL-L] Issues with color sensor >>> >>> Lloyd, >>> >>> This is with the EV3 sensors. I highly recommend having spare sensors >>> during the tournament. We went with 2 identical robots and luckily did not >>> have the sensor issue but better to be prepared. >>> >>> Regards >>> Neelam >>> >>> On Tue, Nov 11, 2014 at 7:51 AM, Lloyd O'Hara <[log in to unmask]> >>> wrote: >>> >>>> Thanks for the change Brittany. >>>> >>>> Neelam, >>>> >>>> Was this NXT or EV3. I ask because we are relying heavily on our NXT >>>> color sensors and we only have two, both in use. I may have to quickly >>>> order a couple more if folks are seeing this with the NXT. >>>> >>>> Thanks, >>>> >>>> Lloyd >>>> >>>> ----- Original Message ----- >>>> *From:* Brittany Rose <[log in to unmask]> >>>> *To:* [log in to unmask] >>>> *Sent:* Tuesday, November 11, 2014 7:44 AM >>>> *Subject:* [VADCFLL-L] Issues with color sensor >>>> >>>> Replying to change the subject from "thank you" to "issues with color >>>> sensor" so that this thread can be searched up more easily in the archives. >>>> >>>> On Nov 11, 2014, at 7:42 AM, Neelam Kadam wrote: >>>> >>>> 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! >>>>>> ------------------------------ >>>>>> >>>>>> To UNSUBSCRIBE or CHANGE your settings, please visit >>>>>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>>>>> leave the list". >>>>>> VADCFLL administrative announcements are sent via >>>>>> VADCFLL-ANNOUNCEMENTS-L. Visit >>>>>> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >>>>>> subscribe. >>>>>> ------------------------------ >>>>>> To UNSUBSCRIBE or CHANGE your settings, please visit >>>>>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>>>>> leave the list". >>>>>> VADCFLL administrative announcements are sent via >>>>>> VADCFLL-ANNOUNCEMENTS-L. Visit >>>>>> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >>>>>> subscribe. >>>>>> >>>>>> ------------------------------ >>>>>> To UNSUBSCRIBE or CHANGE your settings, please visit >>>>>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>>>>> leave the list". >>>>>> VADCFLL administrative announcements are sent via >>>>>> VADCFLL-ANNOUNCEMENTS-L. Visit >>>>>> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >>>>>> subscribe. >>>>>> >>>>> >>>>> ------------------------------ >>>>> To UNSUBSCRIBE or CHANGE your settings, please visit >>>>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>>>> leave the list". >>>>> VADCFLL administrative announcements are sent via >>>>> VADCFLL-ANNOUNCEMENTS-L. Visit >>>>> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >>>>> subscribe. >>>>> >>>> >>>> ------------------------------ >>>> To UNSUBSCRIBE or CHANGE your settings, please visit >>>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>>> leave the list". >>>> VADCFLL administrative announcements are sent via >>>> VADCFLL-ANNOUNCEMENTS-L. Visit >>>> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >>>> subscribe. >>>> >>>> >>>> ------------------------------ >>>> To UNSUBSCRIBE or CHANGE your settings, please visit >>>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>>> leave the list". >>>> VADCFLL administrative announcements are sent via >>>> VADCFLL-ANNOUNCEMENTS-L. Visit >>>> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >>>> subscribe. >>>> >>>> ------------------------------ >>>> To UNSUBSCRIBE or CHANGE your settings, please visit >>>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>>> leave the list". >>>> VADCFLL administrative announcements are sent via >>>> VADCFLL-ANNOUNCEMENTS-L. Visit >>>> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >>>> subscribe. >>>> >>> >>> ------------------------------ >>> To UNSUBSCRIBE or CHANGE your settings, please visit >>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>> leave the list". >>> VADCFLL administrative announcements are sent via >>> VADCFLL-ANNOUNCEMENTS-L. Visit >>> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >>> subscribe. >> >> ------------------------------ >> To UNSUBSCRIBE or CHANGE your settings, please visit >> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >> leave the list". >> VADCFLL administrative announcements are sent via >> VADCFLL-ANNOUNCEMENTS-L. Visit >> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >> subscribe. >> >> ------------------------------ >> To UNSUBSCRIBE or CHANGE your settings, please visit >> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >> leave the list". >> VADCFLL administrative announcements are sent via >> VADCFLL-ANNOUNCEMENTS-L. Visit >> https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to >> subscribe. >> > > ------------------------------ > To UNSUBSCRIBE or CHANGE your settings, please visit > https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or > leave the list". > VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. > Visit https://listserv.jmu.edu/archives/vadcfll-announcements-l.html to > subscribe. > -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. Visit https://listserv.jmu.edu/archives/vadcfll-ANNOUNCEMENTS-l.html to subscribe.