The document is a final report on a practicum measuring tools and circuit boards. It defines a project board as a circuit board that allows electronic circuits to be built without soldering. It describes the specifications of mini project boards, including their size, weight, and layout of pathways connecting component holes. The report explains that project boards make it easy to assemble, test, and modify circuits without permanent connections by allowing components to be easily added or replaced. It also outlines the working principles of direct current measuring tools and provides instructions on how to properly use a project board.