This textbook, released under a Creative Commons Share Alike (CC BY SA) license, is presented in its original format with the adacemic content unchanged. It was authored by James Feher and reviewed by colleagues, and provided by the University of Georgia's Global Textbook Project. This lab manual provides an introduction to digital logic, starting with simple gates and building up to state machines. Students should have a solid understanding of algebra as well as a rudimentary understanding of basic electricity including voltage, current, resistance, capacitance, inductance and how they relate to direct current circuits.