AbstrakPenelitian ini bertujuan untuk mengembangkan media belajar video pada materi pencemaran dan kerusakan lingkungan untuk siswa kelas VII SMP Inshafuddin Banda Aceh. Metode Penelitian yang digunakan adalah penelitian dan pengembangan (research and development) dengan model ADDIE yang terdiri dari 5 langkah, yaitu: analysis, design, development, implementation, dan evaluation. Instrumen yang digunakan adalah lembar angket validasi kelayakan media. Hasil rata-rata angket validasi yang diperoleh dari 4 validator sebesar 92,67% (sangat layak). Hasil yang diperoleh dapat disimpulkan bahwa media belajar video pada materi pencemaran dan kerusakan lingkungan yang telah dikembangkan layak diuji coba lebih lanjut untuk melihat efektivitas dalam pembelajaran.Kata kunci: Video, Pencemaran Lingkungan, ADDIE.
An automatic hand sanitizer allows the discharge of the sanitizing liquid without pressing any nozzle. The design of the automatic hand sanitizer is focused on the mechanism of pressing the nozzle of the hand sanitizer that involves conversion from a rotation movement into a translation movement. VDI 2221 method is used to design the automatic hand sanitizer, which uses Arduino Nano as the microcontroller, servo motor as the motor, ultrasonic sensor for detecting the movement from the environment, and rack and pinion system as the mechanism for pressing the nozzle from the hand sanitizer. The prototype of automatic hand sanitizer has worked well and has become a reference for further development.
This study aims to design and fabricate multi-purpose organic chopper machine by utilizing local components. Research includes the design of construction, cutting tools and working mechanisms that are in accordance with user needs. The method used in this design is the most optimal component selection, strength analysis using structural analysis software, manufacturing and testing of product prototypes. The result of this study is a multipurpose organic chopper machine prototype with a capacity of 600 kg/h, able to cut organic waste to size ranging from 1 to 50 mm, and can be operated easily by the user. This result is one of the references in the development of the next multifunctional organic garbage counting machine. Keywords: design, multi-purpose organic chopper machine.
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