Unlike analog signals, which can exist at an infinite number of levels, digital signals exist at only two levels – zero and one. Our radios, televisions, and audio equipment are no longer analog devices, we all own computers and smartphones, and our appliances and even our light bulbs are now microcontroller-based. We live in a world whether virtually everything is digital. Future articles and videos will expand our coverage to other, more complex, logic gates. We will examine the most basic of these devices today.
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