Correction - The video is from a Germany team.  And they graciously share the following programming / design trick with others:
 
Halljac (1 week ago) 
...
how do you get the robot to follow the black line so smoothly?
robodream (1 week ago) 
---
We follow the line with one light sensor on the "inside" of the bend. Outside motor running all the time, inside motor full powerlevel when seeing white, backwards 20% powerlevel when seeing black. We get the speed by putting the big gearwheel on the NXT Servomotor and the medium gearwheel on the chain shaft. 


 






From: Jin Ye <[log in to unmask]>
Subject: Re: [VADCFLL-L] "Alien" in action on FLL 2009 challenge!
To: [log in to unmask], "Jin Ye" <[log in to unmask]>
Date: Wednesday, November 25, 2009, 9:46 AM







"Alien" is going to leave fun earth place "Youtube" in response of a friendly warning, no late than noon today.
 
"Alien" is just wondering why a Denmark FLL team put their remarkable FLL 2009 Challenge mission executions on Youtube - 
http://www.youtube.com/watch?v=qfZYDcRdkHE.
 
Jin the messenger

--- On Wed, 11/25/09, Jin Ye <[log in to unmask]> wrote:


From: Jin Ye <[log in to unmask]>
Subject: [VADCFLL-L] "Alien" in action on FLL 2009 challenge!
To: [log in to unmask]
Date: Wednesday, November 25, 2009, 6:51 AM







Search Youtube with the keywords "Alien" in action on FLL 2009 challenge!
 
I'm in trouble :-))
 
Jin


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