Power Electronics testing is a must for a broad range of applications from small power adapters for personal computers to large-scale power generation and transmission systems. As electrical and electronics devices play a critical role, developing robust and reliable circuits becomes paramount for their performance and stability. Resistors, inductors, capacitors, and semiconductors, such as diodes, thyristors, field-effect transistors (FETs), and insulated-gate bipolar transistors (IGBTs), are common components in electrical and electronic systems. They are widely applied in, for example, R&D, manufacturing, fault diagnosis, maintenance, education, and training of power electronics. This page describes how to test power electronics by using oscilloscopes in an educational project.