Building upon what we have learned in module three, this module provides in-depth explanations of components found in various types of circuits and how the materials these components are made with have a direct influence on the function of the circuit. After completing this module, students will also be able to identify individual components in a circuit by use of symbols in a schematic or wiring diagram. In addition, students will be able to understand and explain integrated circuits, printed circuit boards and the construction and principles of servomechanisms and related components.