Transistors Changed Everything. Here’s How They Work

The transistor, a tiny electronic switch, sparked the computer revolution by making powerful, efficient devices possible. Its clever design helps people and industries save energy and build smarter technology. This invention transformed daily life in ways we still rely on today.
Last week I revealed the sneaky physics behind the “joule thief,” an electrical circuit that lets you squeeze more energy out of seemingly dead batteries. The key, it turned out, was a clever pairing of a transformer and a transistor. But the transistor deserves its own headline, because it's maybe…
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