How to detect blue line

ashes said:

Basically, I am building line following robot. A track has blue line to follow. With one side of the track being white and the other side of the track being black. I am stuck how to detect the blue light from the black background.

Thanks for the reply

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cowboybob said:

Just noticed you have also posted this question in "Homework" forum.

Please pick one or the other, not both.

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