Indonesia's strong economic growth is expected to continue, thus increasing electricity consumption to reach 491 Tera Watt hours (TWh) in 2030. Significant electricity savings can be obtained by increasing the electrical energy efficiency of homes. The aim of this study is to design a household electrical control system (KENDIL) by using the RLC circuit to reduce the flow in order to achieve more efficient home electricity distribution. The Data collection was carried out at Wisma Kertonegaran as a residential house consisting of 50 rooms. After using KENDIL, The PLN electricity bills per month was decreased from Rp. 176,601.82 / kwh to Rp. 107,294.85 / kwh. It can save electricity bill costs by 60%. This device is an application of electronic skills courses.

The purpose of this research is to understand the physics education concepts through solving unit review problems in free fall topic. This research is a quantitative descriptive study involving 19 students of Physics Education at the University of Tamansiswa. The test instrument consists of 2 essay questions that refer to problem-solving indicators. The results of the study obtained several findings. Analysis of understanding the concepts of physics education students through solving unit review problems in free fall topic had the highest percentage in the medium category. On the problem solving indicators Physics Approach, Specific Application of Physics, and Logical Progression students’ abilities are in the low category.