Home > SP.293 / ESG.SP293 Lego Robotics, Spring 2007 > Study Materials

« Previous A pulley wheel with 6 evenly spaced holes is mounted between two beams, with an LED attached to one beam to shine through the holes as the wheel turns. Next »

Speed sensors use an LED shining through the holes in a standard LEGO pulley wheel, tracked by a photocell (not pictured).


Credit: Image by MIT OpenCourseWare.


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