Core idea
A transistor is a fundamental semiconductor device used to control one current with a smaller control signal.
Explains the basic operation of a BJT transistor, the NPN/PNP distinction and how it differs from a MOSFET.
A transistor is a fundamental semiconductor device used to control one current with a smaller control signal.
BJT transistors have Base, Collector and Emitter terminals.
A MOSFET is controlled by gate voltage, while a BJT is controlled by base current.
Use this lesson together with Claddify component pages and finder tools. Verify the datasheet and connection orientation before building a real circuit.
This page BJT Transistor Fundamentals is step 1 of 6 in the path.