The document outlines the circuit designs and operations for an ALU project, detailing key components such as input, logic, arithmetic, multiplication & division, BCD/excess-3 addition, conversion, gray code & negation, and shifting kits. Each kit's features, functions, and schematics are described, along with challenges faced during PCB design and implementation. Ultimately, the team used various circuit simulation techniques and Altium software for PCB designs, opting for single-layer or double-layer designs based on capacity and accuracy considerations.