Digital technology has become widespread and encompasses virtually all aspects of our everyday lives. Technology like this might find a variety of applications in fields as diverse as medicine, robotics, entertainment, and automation. Real-world measurements are made using analogue values; however, they are often processed digitally. To do this, we must first digitise the measured analogue amount, then apply digital circuitry to that number, and then revert back to the analogue form. This book covers the fundamentals of digital circuit design for implementing digital quantity processing. It’s certain that the field of engineering, which is ripe for digital change, will soon spread over the world. This book delves into the field of digital systems engineering, which works to facilitate the burgeoning field of digital engineering by creating theory, techniques, models, and tools. The digitization of engineering artefacts is essential because it opens the door to cross-platform, cross-lifecycle, and cross-domain information exchange. The primary objective of this book is to introduce readers to the ideas of digital systems, including logic gates for combinatorial logic circuit construction and higher-level logic components like counters and multiplexers. It is hoped that it would also be helpful to students in other fields who are taking introductory electronics courses.