Digital circuitry is the foundation of computers and automated control equipment in our industries. Digital circuitry is the basis for many of our appliances, alarm systems and heating systems. Our newer automobiles utilize digital circuits and devices to make them safer and more energy efficient. Consequently, a basic understanding of the elemental nature, design, theory, and operation of digital circuits is a must for any electronics student. This course provides the basic foundation necessary for the understanding of digital logic. The student is introduced to the concepts of digital vs. analog wave forms, digital and other numbering systems, digital codes, and Boolean algebra. The student is then introduced to the various logic gates that are incorporated into all logic systems from that of a computer to a microprocessor in a household appliance. This course explores the combinational circuits, data control devices, sequential logic (flip-flop and counters) circuits and shift registers, and finishes with an interface with the world of analog.