How Transistors Work and Why They Sparked the Computer Revolution

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Transistors are tiny electronic switches that form the fundamental building blocks of modern computing. By controlling the flow of electrical current, they can represent binary on/off states essential to digital processing. First developed in the mid-20th century, transistors replaced bulky vacuum tubes and enabled electronics to shrink dramatically in size. Their invention set off a technological revolution that made possible everything from personal computers to smartphones. Today, billions of transistors are packed onto a single microchip, continuing to drive advances in computing power.

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