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Unread 14-01-2012, 18:42
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Re: What sensor to use?

Photosensors only detect changes in the reflected color they see, an arrangement of 3 is what allowed you to track a line. A single photosensor can detect when a ball passes by it.

As for a rangefinder, you would want to look into a ultrasonic sensor, most have either instructions on how to determine the actual range or the code used to initialize it will get it for you.

Anything using a laser (other than class I lasers) are specifically restricted by rule R08. (Don't forget to read the blue box!)
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