In this video, I will easily answer all the following questions: What is a MOSFET? What is a transistor? Types of transistors What is the difference between a MOSFET and a transistor? How MOSFETs work How transistors work How to test a MOSFET with a multimeter How to test a transistor with a multimeter MOSFET test Transistor test Identifying transistor pins Identifying MOSFET pins What is an igbt How to test an igbt ++ In analog circuits, transistors are used in amplifiers (amplifying signals such as sound, radio waves, ...) and in linear and nonlinear stabilized power supplies (switching power supplies). In digital circuits, transistors are used as electronic switches, although they are rarely used as a separate component, but rather interconnected in integrated circuits. Digital circuits include logic gates, random access memory (RAM), microprocessors, and digital signal processors (DSP). A BJT transistor has three terminals: base, collector, and emitter. Structure of a Bipolar Junction Transistor BJT bipolar junction transistors are formed by connecting three layers of semiconductor crystals. The middle layer is called the base, and the two side layers are called the emitter and the collector. The type of base crystal differs from the type of emitter and collector crystals. Usually, the emitter has more impurities than the other two layers, and the width of the base layer is smaller and the width of the collector layer is larger than the other layers.[2] In a bipolar transistor, the emitter layer has the highest amount of impurities; electrons are emitted from the emitter to the collector layer, which has less impurities.[3] The importance of the transistor has been considered one of the greatest inventions in modern history, ranking alongside the printing press, the automobile, and electronic and electrical communications in terms of importance. The transistor is a fundamental active element in modern electronics. The importance of the transistor in today's society lies in its ability to be mass-produced using a fully automated manufacturing process that costs very little per transistor. Although transistors are still used individually, they are more commonly used in integrated circuits (often abbreviated ICs, microchips, or simply chips) along with diodes, resistors, capacitors, and other electronic components to form a complete electronic circuit. For example, a logic gate has about twenty transistors, and an advanced microprocessor as of 2006 is made of more than 7.1 million MOSFET transistors. Low cost, flexibility, and reliability have made the transistor a versatile component. Transistor circuits have become a popular replacement for control devices in appliances and machines. Using a standard microcontroller and writing a computer program that performs the control action is often cheaper and more effective than designing the equivalent mechanical part. ++ 05:06 (NPN) Function of NPN transistor and its analogy to a water pipe 05:59 (NPN) Symbol of NPN transistor 06:17 (PNP) Function of PNP transistor with an interesting example 06:53 (PNP) Function of PNP transistor and its analogy to a water pipe 07:30 (PNP) Symbol of PNP transistor 07:46 (PNP & NPN) Difference between NPN and PNP transistors 07:56 (PNP & NPN) Symbol of bipolar transistors on a printed circuit board 08:07 How a transistor is made 08:39 How to check a transistor with a multimeter ++ Couldn't do a specific task, so be the first one