Digital Electronics compact notes provide a clear and comprehensive understanding on digital fundamental such as analog and digital signals, number systems, digital codes, logic gates, boolean algebras, Karnaugh map, combinational logic circuit design, MSI circuits, latches,flip-flops, counters, registers, semiconductor memories and integrated circuit technology. Figures and diagrams are included to assist reader's in analysing and understanding the subject. Several examples throughout the text have been prepared with selected working solutions.