Infotekmesin
INFOTEKMESIN is a peer-reviewed open-access journal with e-ISSN 2685-9858 and p-ISSN: 2087-1627 published by Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Cilacap. The journal invites scientists and engineers to exchange and disseminate theoretical and practice-oriented in the various topics include, but not limited to Informatics, electrical Engineering, and mechanical Engineering.
Articles
669 Documents
<![CDATA[Prototype Sistem Kendali Pintu Gerbang Otomatis Berbasis Internet of Things (IoT): Indonesia ]]>
<![CDATA[Novita Lestari Anggreini]]>;
<![CDATA[Nia Ekawati]]>;
<![CDATA[Hasbi Nur Ichsan]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1893
<![CDATA[An automatic gate is a door whose operation process runs automatically using a remote drive tool, but when combined with IoT elements, it means that users can control the automatic gate using a cell phone or mobile phone. The purpose of this research is to create a prototype of an automatic gate control system based on the Internet of Things (IoT). The method used in the current research is the prototype method. The results in this study were tested to determine the range. Testing is done using an adapter connected to a power supply. The testing process is carried out by observing the movement and response of the servo motor when controlled via a smartphone and the stepper motor when the Ultrasonic sensor detects an object less than 5 cm. The conclusion of this research is that at a distance of 1 to 19 meters, the gate lock can still be controlled properly. While at a distance of 20 meters when the gate lock is open, the gate opens and closes. This is because the WiFi signal cannot be captured properly by the central controller of the circuit at a distance of more than 19 meters.]]>
<![CDATA[Studi Perancangan Instalasi Penerangan dan Pengkondisi Suhu Ruangan Pada Gedung Bertingkat Las Mesin ]]>
<![CDATA[Vicky Prasetia]]>;
<![CDATA[Erna Alimudin]]>;
<![CDATA[Purwiyanto Purwiyanto]]>;
<![CDATA[Muhamad Yusuf]]>;
<![CDATA[Mohammad Nurhilal]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1895
<![CDATA[Lighting is one of the most important requirements of a building. This is because inadequate lighting of a space can affect the health and comfort of activities in that space. In addition to less important lighting, room temperature adjustments, room temperature adjustments have a significant impact on comfort during activities in the room. This magazine describes the lighting and room temperature control design of the CilacapState Polytechnic Welder Shop. The method used in this study is a quantitative method. This method calculates the required lighting and room temperature control and compares it with the standards. 2 rooms increase the number of light points and 3 rooms change the type of lamp with a higher lumen. There are 8 rooms that are recommended to use air conditioners with SNI 91714189. According to the SNI, the number of air conditioners and the capacity of air conditioners adjusts to the size of the room.]]>
<![CDATA[Pengaruh Pemadatan Dua-arah Penekanan terhadap Densitas dan Kekerasan AMC diperkuat Serbuk Silikon Dioksida ]]>
<![CDATA[Ricky Irwansyah]]>;
<![CDATA[Rodika Rodika]]>;
<![CDATA[Agus Wanto]]>;
<![CDATA[Mego Wahyudi]]>;
<![CDATA[Sukanto Wiryono]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1902
<![CDATA[The compaction method of powder metallurgy technology is an important process in influencing the density and hardness of the resulting product. This study aims to determine the effect of a one-way compaction method compared to a two-way compaction method on the density and hardness of the resulting composite product. The experimental method for making aluminum matrix composites with silica sand reinforcement applies a compaction pressure of 4500 Psi. Mixing utilizing mechanical alloying used a horizontal ball mill machine. The density test refers to the Archimedes principle with the ASTM B962-17 standard, while the Rockwell Brinel hardness test uses the ASTM E110-14 standard. The results of the sample density test of the two-way compaction method of compaction showed a higher value compared to the sample density of the one-way compaction results, respectively; values of 2.132 g/cm3 and 2.119 g/cm3. The hardness value of the sample resulting from two-way compression compaction also has a higher value than the sample hardness resulting from one-way compression compaction, respectively; worth 43.67 HRB and 36.78 HRB. Furthermore, based on the results of microstructural analysis, the interlocking bonding occurs in composite samples with two-way compaction. It is also better than the interlocking mechanical bonding in composite samples resulting from one-way compaction.]]>
<![CDATA[Investigation of Exhaust Emissions Combustion Characteristics in Single Spark Ignition-Engine Matic with Butanol-Gasoline Mixture ]]>
<![CDATA[Gatot Setyono]]>;
<![CDATA[Dwi Khusna]]>;
<![CDATA[Navik Kholili]]>;
<![CDATA[Lingga Putra Sanjaya]]>;
<![CDATA[Fajar Galang Argil Putra]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1903
<![CDATA[Butanol as a fuel has a high oxygen content, so the combustion process will be more friendly to the environment. In this study, butanol will be mixed with RON-90 gasoline with a capacity of 5% (B5); 7%(B7); 10%(B10); 12%(B12); 15%(B15) and 18%(B18). The engine used is an automatic transmission with a capacity of 109.5cc with a compression ratio of 9.5:1. The test equipment for engine performance and exhaust emissions is the 50L BRT Super-Dyno and EPSG4 Gas Analyzer. The results showed that using B18 fuel for CO exhaust emissions decreased by 44% at an engine speed of 6000rpm. CO2 exhaust emissions have decreased by 47% at 8000rpm engine speed. HC exhaust emissions have decreased by 28% at 9000rpm engine speed. In contrast to NOx emissions, which increased by 22% at 9000rpm engine speed, this was due to the increasing temperature in the combustion chamber.]]>
<![CDATA[Efek Pencampuran Butanol dan Diethyl Ether (DEE) Pada Pertalite Terhadap Torsi, Daya dan Brake Spesific Fuel Consumpsion Mesin Bensin 160cc ]]>
<![CDATA[Firman Lukman Sanjaya]]>;
<![CDATA[M. Khumaidi Usman]]>;
<![CDATA[Faqih Fatkhurrozak]]>;
<![CDATA[Syarifudin Syarifudin]]>;
<![CDATA[Andre Budhi Hendrawan]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1906
<![CDATA[The increase in the volume of vehicles resulted in a crisis of fossil fuels so there is a need for alternative fuels to replace gasoline. Butanol and Diethyl Ether (DEE) are alternative fuels that can be added to gasoline. This is because the Octane Number and high O2 levels optimize combustion in the cylinder and increase torque and power and save fuel. This study compares the addition of butanol and DEE to gasoline on torque, power, and Brake Specific Fuel Consumption (BSFC). The study used a 160cc gasoline engine with a carburetor with engine speeds of 1000, 2000, and 3000 rpm. Variation of fuel mixture 5%, 10%, and 15% on gasoline. The results showed that the DEE15 mixture increased the highest torque by 28% at 3000 rpm compared to other fuel mixtures. Engine power also increases the highest by 28% when using a mixture of DEE15 compared to other fuels. Meanwhile, BSFC experienced the highest decrease of 19% when using the DEE15 mixture compared to other mixtures.]]>
<![CDATA[Klasifikasi Opini Publik di Twitter Terhadap Bakal Calon Presiden Indonesia Tahun 2024 Menggunakan LSTM Secara Realtime Berbasis Website ]]>
<![CDATA[Muhammad Rizki]]>;
<![CDATA[Muhammad Fikri Hidayattullah]]>;
<![CDATA[Dwi Intan Af'idah]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1908
<![CDATA[The analysis of public opinions from Indonesian netizens regarding the potential presidential candidates for Indonesia in 2024 on Twitter is challenging. Human-based classification of the candidates on Twitter has limitations as it requires expertise and a considerable amount of time to process the data. Therefore, a system that provides realtime visualization of public opinion classification is necessary. Previous research only focused on model evaluation, while this study aims to implement the best model on a website. The objective of this research is to develop a system for monitoring the Twitter-based public opinion classification of the potential presidential candidates for Indonesia in 2024 within specific time frames. The training process utilizes the LSTM method, resulting in a model with an accuracy of 76%. Parameters such as batch size, dropout, and learning rate were tested. The data used in this study was obtained by crawling Twitter using the keywords Ganjar Pranowo, Anies Baswedan, and Prabowo Subianto. The LSTM model was then implemented in a website-based system that generates a dashboard with features such as a color-coded map displaying the highest levels of positive sentiment for each candidate in each province, the overall classification count for each candidate, and filters for sentiment classification based on province and specific time frames.]]>
<![CDATA[Optimalisasi Labview Sebagai Kendali dan Monitoring Arus Tegangan pada Modul Solar Cell Menggunakan Jaringan Lokal ]]>
<![CDATA[Sugeng Dwi Riyanto]]>;
<![CDATA[Purwiyanto Purwiyanto]]>;
<![CDATA[Riyani Prima Dewi]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1910
<![CDATA[Renewable energy sources in Indonesia have been widely used, one of which is solar energy, for various needs, one of which is for solar power generation by using solar cells as the medium. In generating electricity, solar cells are very dependent on the intensity of the sun so as to produce currents and voltages that are not constant. Because of this, a monitoring system was created to monitor the current and voltage in a solar cell module to determine current and voltage conditions. In this study, the monitoring system used wireless data transmission via the XBee S2C module installed on the Arduino Mega 2560 and Arduino UNO. The INA 219 sensor is mounted on a solar cell module along with a relay module connected to the Arduino Mega 2560 and the XBee S2C module. The test results show that wireless data transmission cannot be used indoors at a distance of more than 20 meters. The INA 219 sensor as a reader for DC current and voltage parameters has an error rate of 0.49% to 0.75% for voltage and for DC current readings it has an error rate of 1.85%. The results of current and voltage readings are displayed on a LabVIEW interface in real-time and can be accessed via a web browser using a local network. Relay control carried out through LabVIEW has a delay time of 6.08 seconds. Logging data can be stored in .xls files and data displayed on a web browser has a delay of one to two seconds.]]>
<![CDATA[Perbandingan Nilai Daya Luaran Panel Surya Kapasitas 50Wp Terhadap Posisi Reflektor Cermin Datar ]]>
<![CDATA[Arif Sumardiono]]>;
<![CDATA[Fadhillah Hazrina]]>;
<![CDATA[Arief Syaefulloh]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1913
<![CDATA[Solar panel systems are widely used to meet energy needs at this time. Solar panels have optimal power for 4 hours, namely 10:00 to 14:00. but this is still said to be not optimal if the angle of the static solar panels does not follow the movement of the sun. This can also be caused by weather factors that are covered in clouds. Previous research conducted by Tri Wahyu Ardianto used mirror reflectors but was not equipped with sensors and data storage. Based on this, to optimize solar panel energy, a flat mirror reflector design for solar panels has been made, equipped with four flat mirror reflectors on each side to form a large square. The solar panel is placed in the middle between the four flat mirrors. In this study, the measurement of electric power was carried out by carrying 3 variable angles for reflector positions, namely 0°, 60°, and 70°. The decision of the three reflector positions is made to find out the ratio of the maximum output power values. This system is also equipped with current, voltage, and light intensity sensors. The results show that the maximum output power of solar panels is shown at the reflector position of 60° with an average power output of 19.70 Watt followed by a reflector position of 70° with an average output power of 19.18 Watt and finally the reflector position is 0° with an average output power value of 14.87 Watt.]]>
<![CDATA[Monitoring of Rice Dryer Machine Using Tray Dryer Method ]]>
<![CDATA[Neneng Herani]]>;
<![CDATA[Saepul Rahmat]]>;
<![CDATA[Vicky Prasetia]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1915
<![CDATA[Indonesia is an agricultural country with 40% of the population's livelihood provided by farmers. Harvested rice typically has a moisture content of 20-27% on a wet basis. The type of artificial dryer that is often used is the tub or rotary type. This research aims to develop a rice dryer using a combined tray and rotary-type method. Based on the result, the higher the speed dryer, the shorter the drying time. The net result of this test is that the relationship between time and engine speed is inversely proportional. The higher the speed, the shorter the drying time. The net result of this test is that the relationship between time and engine speed is inversely proportional. Rice drying results can be described as dry, but not including ready-to-eat rice standards. The higher the speed, the shorter the drying time.]]>
<![CDATA[The Influence of Fillet Step on Backward-Facing Step Flow Characteristics ]]>
<![CDATA[James Julian]]>;
<![CDATA[Rizki Aldi Anggara]]>;
<![CDATA[Fitri Wahyuni]]>
<![CDATA[ Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023 ]]>
Publisher : <![CDATA[P3M Politeknik Negeri Cilacap ]]>
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DOI: 10.35970/infotekmesin.v14i2.1919
<![CDATA[Backward-facing step (BFS) is a model that provides several applicative features in engineering. The complex phenomena of BFS flow have a crucial impact on any application. Therefore, this study comprehensively investigates the flow characteristics of BFS with various step shapes. The backward-facing step (F-BFS) fillets were tested at intervals of Reynolds number 50 smaller than Re smaller than 400 using the CFD approach. Based on the computational results, it was found that flow separation is a fundamental phenomenon in BFS flow. Due to sudden expansion, Flow separation forms a recirculation area which continues to increase almost linearly with an increase in the Reynolds number. The recirculation area contains unstable rotating vortexes, which can impact the flow efficiency of BFS. Using a different step shape proves that F-BFS can minimize the recirculation area to increase the efficiency of the BFS flow.]]>
