How Computers Work: From Simple Switches to Modern Processors

Have you ever wondered what actually happens inside a computer when it executes a line of code? To truly master software or systems engineering, you must understand the physical foundation that makes computing possible. This text-based course guides you through the entire journey of computer hardware, explaining how simple electrical switches evolve into powerful modern processors. You will build a strong mental model of digital systems without needing a background in electronics, moving systematically through levels of abstraction from basic logic gates to full central processing units. What you'll learn: Understand the foundational concepts of binary logic, transistors, and logic gates. Build complex digital circuits conceptually, including adders, multiplexers, and memory units. Analyze how the Central Processing Unit (CPU) executes instructions using the fetch-decode-execute cycle. Explore modern processor architectures, including the concepts of pipelining and cache hierarchies. Discover the open-source RISC-V instruction set architecture as a modern standard for hardware design. Appreciate the trade-offs between performance, power consumption, and design complexity in modern silicon. The course begins with the absolute basics of electrical switches and binary representation, gradually introducing logic gates, memory storage, arithmetic units, and finally, complete CPU design. This course is designed for curious beginners, software developers, and computer science students who want to build a solid foundational understanding of hardware with no prior electronics experience required. Start reading today to bridge the gap between software and physical hardware.