This document is a Competency Demonstration Report (CDR) detailing a student's project on developing an AC voltage stabilizer. The project involved designing and implementing a voltage stabilizer using parallel cascaded relays to address voltage fluctuations. The report covers the project's background, objectives, the student's role as team leader, and the engineering knowledge applied, including the use of Faraday's Law for transformer design. The student describes the design process, including the transformer core, circuit design, and testing of various modules. Challenges encountered, such as determining current requirements, are also addressed, along with the solutions implemented. The report concludes with a review of the project's outcomes, highlighting the successful achievement of the objectives and the constant output voltage despite input voltage variations. The student's contributions encompass hardware identification, team guidance, and problem-solving. The report is a comprehensive overview of the project, from conceptualization to final testing and evaluation.