The development of science and technology has a direct impact on the preparation of a qualified workforce, including the preparation of workforce graduates of Vocational High Schools. One of the learning materials in Vocational High Schools is basic material on electricity and electronics. Introduction to the basic material of electricity and electronics will be very difficult if only with books. Therefore, this study aims to create an interesting and interactive learning media. This media uses the Delphi program. In the learning media, there are materials and exercises for basic electricity and electronics subject matter for passive components of RLC. The design of this learning media development follows the ADDIE stage (Analyze, Design, Development, Implementation, Evaluation). The validation of this learning media program includes validating the content and design of the media itself. Based on the results of data analysis, it was found that the learning media developed in this study had a very high validity value from the two aspects assessed. For the validity of the learning media subject matter, the results of validation by experts are 3.61 and validation by the teacher is 3.6 so that it is very relevant to the concepts to be taught using this media, while for the validity of media design by experts is 3.5 and by the teacher 3.62 so that the learning media This research can be declared fit for use to support learning in school.

Kebutuhan akan konsumsi energi listrik sangat tinggi dan semua aktivitas manusia banyak yang menggunakan energi listrik. Listrik juga sangat dibutuhkan pada industri, karna seluruh alat hampir semua menggunakan listrik. Karna penggunaan listrik sangat besar pada PT. Cemindo Gemilang membangun unit WHRS (Waste Heats Recovery System) untuk menyuplai listrik. Dalam penelitian ini bertujuan untuk mengetahui bagaimana prinsip kerja serta proses kerja pada WHRS. Metode yang digunakan yaitu dengan observasi dan wawancara untuk mengetahui bagaimana proses pada WHRS tersebut. Hasil kesimpulan yaitu Waste Heats Recovery System ini merupakan pembangkit listrik yang menggunakan sisa panas atau flue gas sebagai pengganti batu bara untuk memanaskan air pada boiler.

Vocational High School is an educational institution that produces products in the form of Human Resources who have a level of competence that can be accepted and needed in the business and industrial world. The service activity in the form of a K13 learning device workshop at SMK KAL 1 Surabaya is a synthetic activity and application of all lecture material in the field of study, education that has been obtained through the lecture mechanism in the form of institutional management performance and learning management. In this learning tool workshop, 2 forms of data collection techniques are used, namely post-test and assessment in the form of a rating scale using a Likert Scale. The instrument used in this study was a test instrument used to obtain data on the level of teacher knowledge of learning and assessment tools, as well as obtain data on performance results and the feasibility of preparing lesson plans. The implementation of service at SMK KAL-1 Surabaya has a positive impact. Where it can be seen from the results of the teacher's knowledge test before the implementation of the pre-test workshop it was obtained 64.95, and after the post-test workshop it was obtained 92.63. Through an assessment using a rating scale with a Likert scale reference, 5 lesson plans with eligibility criteria are very good or very feasible.

: Health problems are classic problems that still often occur, especially during a pandemic. The problem in terms of health in Sumber Gresik Hamlet is quite severe which is due to the lack of public health awareness. There are still people who live with unhealthy lifestyle habits. The purpose of this service activity is to provide ideas for community empowerment with alternative solutions in the form of education on household herbal medicine management. The method used is outreach to the community and poster distribution. In this service activity, the researchers collaborated with the youth groups of Dusun Sumber Gresik as a place for counseling on herbal medicine processing. The results of community service are increasing the motivation of villagers and changing their mindset about being more aware of caring for health and the environment.

Listrik merupakan kebutuhan yang sangat penting bagi kehidupan manusia, salah satu hal yang berkaitan dengan listrik ialah panel listrik yang berfungsi sebagai penyalur energi listrik. PT. Tiga Kreasi Indonesia merupakan suatu perusahaan yang bergerak pada bidang pembuatan panel listrik dengan salah satu hasil produksinya adalah Panel Kapasitor Bank yang berfungsi untuk memperbaiki faktor daya. Pembuatan Panel kapasitor Bank tidak lepas dari istilah perancangan, dimana meliputi komponen yang akan digunakan,  kontruksi panel, wiring diagram dan single line diagram, serta perhitungan kebutuhan Panel Kapasitor Bank. Panel Kapasitor Bank dapat dioperasikan dengan cara manual dan otomatis. Penelitian ini dilakukan dengan cara observasi dan wawancara secara langsung ke PT. Tiga Kreasi Indonesia untuk mendapatkan data terkait judul. Penelitian ini menambah pengetahuan dan pemahaman baru terkait perancangan pada Panel Kapasitor Bank 1200KVAR yang banyak digunakan di industri maupun perkantoran untuk meminimalisir faktor daya yang dihasilkan.