BJT (Bipolar Junction Transistor)

A Bipolar Junction Transistor (BJT) is a semiconductor device used to amplify or switch electronic signals. It has three parts: the emitter, base, and collector. When a small current is applied to the base, it controls a much larger current flowing from the collector to the emitter. Think of it like a water faucet: a small push on the handle (base current) controls a larger flow of water (main current). BJTs are fundamental in electronic circuits for tasks like amplification, switching, and signal processing.