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Every curious how DVDs work? Interested in learning some simple analog electronics? This Instructables will show you how to make an optical disk display project in only a few hours. What is an optical disk? An optical disk stores data/information and can be read or displayed using light. You will learn about basic analog electronics, basic electronic optics, and various basic electrical components. You will be making a fun encoder, turning a digital light interface into an analog signal that controls a 7-seg display.”

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