Thingiverse
Ball Caster with LED holder
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-Marble holder combined with IR LED and photo transistor holders.
-IR LED holder has diameter of 5mm
-Photo Transister holder has a diameter of 3mm
-Marble holder holds a marble with 16mm diameter
-There are two, 3mm screw holes situated atop of the cylinder, along with a shelf for an M3 nut
-IR LED holder has diameter of 5mm
-Photo Transister holder has a diameter of 3mm
-Marble holder holds a marble with 16mm diameter
-There are two, 3mm screw holes situated atop of the cylinder, along with a shelf for an M3 nut
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