Transistor model

A transistor is like a switch or an amplifier. It's made of a semiconductor material, like silicon, that controls the flow of electricity. Transistors have three parts--the base, collector, and emitter. The base is the part that is activated to control the transistor, the collector is the part that collects the electricity, and the emitter is the part that emits the electricity. The transistor is like a valve that can increase or decrease the flow of electricity and be used to control the flow of electricity in a circuit. By controlling the amount of electricity that is allowed to flow through it, a transistor can act like an amplifier, allowing very small changes in electric current to be amplified into higher levels of output.