Jurnal Sains Teknologi Transportasi Maritim e-ISSN 2722-1679 p-ISSN 2684-9135 Volume 5 No. 2, November 2023, pp.67-76 67 DOI: 10.51578/j.sitektransmar.v5i2.73 *Corresponding Author This is an open access article under the CC BY-SA license SOLENOID VALVE CONTROL DESIGN USING ARDUINO ON FRESHWATER GENERATOR PROPERTIES Aditya Prasetyo 1 , Amad Narto 2 , Febria Sujarman 3 , Riyadini Utari 4* 1,2,3,4 Semarang Maritime Polytechnic *Email: riyadini.utari@pip-semarang.ac.id ABSTRACT In the modern era of the maritime world, the learning process related to ship machinery is essential and crucial for students to master. So many effective learning methods are used, one of which is the learning method using machining aids on ships. Therefore, making ship machining aids is an exciting thing to work on in this modern era. The type of teaching aid made by the author is a solenoid valve controlled by Arduino on a freshwater generator teaching aid. The method used is research and development, a process or steps to develop a new product or improve an existing product, both hardware and software. The model in this development research is a procedural model, which outlines the manufacturing steps exposed sequentially and gradually from the beginning to the end. The solenoid valve control model by Arduino on the freshwater generator teaching aid utilizes two electronic modules: the Arduino Uno type module and the one-channel timer delay relay module. The two modules are programmed directly with the buttons on the module. The working system in this prop is that the heater is filled with water and then heated, and then the water vapor is flowed through the transfer pipe and condensed using a condensor and holding tank. This system can run because of the automation control system in the electronic module. Keywords: props, freshwater generator, electronics module, timer delay relay INTRODUCTION At the Sailing Academy, especially in the Engineering field, improving facilities in the teaching and learning process really needs to be paid attention to, to improve the quality of cadets' understanding of teaching and learning, especially in the Engineering study program regarding freshwater generator systems on ships, different media and methods need to be used. The use of learning media and experimental methods must be able to create motivation to carry out an effective learning process to achieve learning goals (Muhtar et al., 2020). Teaching aids are tools used to support the teaching and learning process, play a significant supporting role in teaching and learning activities, and support the instructor or teacher's teaching and learning activities (Arsyad, 2013). According to Anderson, props are media or equipment used to help teachers (Anas, 2014). Making teaching media in the form of teaching aids helps improve cadets' understanding of the material to be studied. With the help of media, teaching aids also increase the creativity of cadets to be more innovative, significantly further developing the use of technology in the current era of globalization . Water is one of the most critical resources in our world. The existence of water that is clean and safe for consumption is a significant factor in maintaining human and ecosystem welfare. In many places,