The book is aimed at readers interested in the hardware design of digital electronic circuits and systems. It introduces the basics of digital electronics and then describes in detail both combinational and sequential components. The book aims at providing an indepth overview of commercially available off-the-shelf devices necessary to design low-and medium-complexity digital electronic systems. Topics covered in the book: Basic and advanced logic gates; TTL and CMOS logic families and interoperability; Combinational logic and truth table; Sum-of-Products, Product-of-Sums, and Karnaugh maps design; Sequential logic and classifications; Latches and Flip-Flops; Combinational components (encoders, decoders, comparators, parity generators and checkers, Adders, ALU, mux, demux); Sequential components (latches and flip-flops, shift-registers, counters); Memories (ROM, RAM, SDRAM and flash); 8-bit Microcontrollers’ architectures and development tools; Basics of typical microcontroller’s assembly language and opcodes; Microcontrollers’ internal peripherals and their working operations.