 | | Black —Mike W. Burger
| | | | Since I am currently working on line following, I did some tests with the Lego active light sensor. I mounted one on a small test cart pointing down a bit more than 1/8 inch above the "ground". The 1.5 test pad reads white 57 black 38 green 46 I (...) (25 years ago, 28-Jan-00, to lugnet.robotics.rcx)
| | | | | | | | | | Re: Black —Garry Hayne
| | | | | | Mike W. Burger <mike@hawaii.edu> schrieb in im Newsbeitrag: Fp0ys8.CB0@lugnet.com... (...) The colors we see lie in the range 400 to 700 nanometers. The response of the Lego sensors are completely different to our "sensors". This is why some of the (...) (25 years ago, 28-Jan-00, to lugnet.robotics.rcx)
| | | | | | | | | | | | Re: Black —Peter Vogel
| | | | | | I attempted to do the "black vinyl between LED and sensor" modification that Ralph Hempel documents on his site, but I was unable to get the vinyl to slide between the LED and the sensor (too tight a fit). So I used a small wire (toothpick would do (...) (25 years ago, 28-Jan-00, to lugnet.robotics.rcx)
| | | | | | | | | | | | Re: Black —Steve Hodge
| | | | | (...) Keep in mind that the light sensor generates a red light, so you're really measuring the reflectivity of the target in the red part of the spectrum. Thus red is as reflective as white (some of the other results, e.g lavendar, are still pretty (...) (25 years ago, 29-Jan-00, to lugnet.robotics.rcx)
| | | | | | | | | | | | Re: Black —Mike W. Burger
| | | | | (...) True, I was shocked at all the colors that were "white". I think part of this is due to the poor quality of the construction paper. Close examination indicates a fair amount of unstained fiber, for instance the black read a lousy 47, compared (...) (25 years ago, 29-Jan-00, to lugnet.robotics.rcx)
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