This is our marble sorter, to make sure the marbles go into the trail, we used a plate and cut it into a cone shape, then to seperate the wood and metal from the three types of glass we measured the diameter of the marble and then from there seperated the trail so only they would fall down. From there we had magnets on the bottom to catch the metal and a fan to push the wood into another seperator. Then we tried to use a lamp and phototransistor to seperate the colored glass but we could never figure it out.
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