MOSFETs are everywhere in modern electronics, from simple switching circuits to motor controllers, power supplies, and audio amplifiers. But understanding how these transistors work is only part of the challenge. How do you choose the right MOSFET , simulate its behavior, and turn a circuit diagram into something that works on your workbench? In his book Practical MOSFET Electronics: Theory, LTspice Simulation, and Hands-On Projects , Prof. Dr. Dogan Ibrahim takes readers through that process, combining semiconductor fundamentals with circuit simulations and practical projects. Understanding MOSFETs Through Experimentation The book begins with the fundamentals of semiconductor devices, explaining how MOSFETs operate and how they differ from bipolar junction transistors (BJTs). Readers explore N-channel and P-channel devices, operating regions, and the characteristics that determine how a MOSFET behaves in a circuit. Rather than stopping at theory, Ibrahim introduces LTspice as a tool for examining circuit behavior before building anything. Readers can simulate voltages, currents, and waveforms, then compare those results with real circuits. This approach continues throughout the book, helping readers understand not just whether a circuit works, but why it behaves the way it does. From Simple Switching to Motor Control One of the book’s strengths is its variety of hands-on projects. Early examples demonstrate how MOSFETs can control LEDs, relays, buzzers, and sensors. Readers then explore circuits using light, temperature, touch, tilt, reed switches, and passive infrared (PIR) motion detection. Motor control is another important topic. Using pulse-width modulation (PWM), readers learn how to adjust the speed of DC motors and fans. Arduino-based examples include a potentiometer-controlled motor and a temperature-controlled fan that responds to changes in ambient temperature. An Arduino Uno connected to a MOSFET-based H-bridge circuit. (Source: Dogan Ibrahim) These projects illustrate how MOSFETs connect low-power control electronics to devices requiring higher currents. Amplifiers, Oscillators, and Power Electronics As the projects become more advanced, the book introduces MOSFET small-signal amplifiers and several oscillator designs, including Colpitts, Hartley, phase-shift, and Pierce oscillators. Readers also investigate digital logic circuits built from discrete MOSFETs, followed by practical applications in power conversion. Buck and boost DC-DC converter projects demonstrate how switching circuits can step voltages down or up. A MOSFET-based DC-DC buck converter built on a breadboard. (Source: Dogan Ibrahim) The final chapters explore MOSFET audio power amplifiers, including different amplifier classes and the design considerations involved in driving an audio load. A Practical Reference for Electronics Enthusiasts Written for engineers, students, and experienced makers, Practical MOSFET Electronics offers a structured way to develop MOSFET design skills. Its combination of explanations, LTspice simulations, circuit diagrams, and construction projects makes it useful both for learning the fundamentals and for experimenting with new circuit ideas. Prof. Dr. Dogan Ibrahim, the author of more than 120 technical books, brings his background in electronic engineering and teaching to a subject that remains central to modern circuit design. Interested in learning how to design, simulate, and build MOSFET circuits? Discover Practical MOSFET Electronics: Theory, LTspice Simulation, and Hands-On Projects in the Elektor Store . The post Practical MOSFET Electronics: From Theory to Working Circuits appeared first on eeNews Europe .