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Analog and Digital Signals: Seeing is Believing!
"Daddy—what's a digital signal?" Yikes! How do you explain a question like that? Analog and digital signals are all around us, but it's pretty hard to get across the basic concepts to kids or people with non-technical backgrounds. For instance, you can say, "Well, vinyl records are analog and CDs are digital," but it won't help because most kids these days have never even seen a vinyl record.
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