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Infotekmesin
Published by Politeknik Negeri Cilacap
ISSN : INFOTEKMES     EISSN : 26859858     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering
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.
Arjuna Subject : -
Articles 707 Documents
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Isolasi Senyawa Tiofen dari Bunga Tahi Ayam (Tagetes spp) Sebagai Odoran Gas LPG Rosita Dwityaningsih; Zhilal Shadiq; Mohammad Nurhilal; Ayu Pramita; Septian Hanjaya
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Liquefied Petroleum Gas (LPG) is a mixture of propane and butane gases. LPG is characterized by being colorless and odorless, requiring an additive to act as an indicator of a leak in the gas cylinder, allowing it to spread into the air. The additive currently used as an odorant in LPG is ethyl mercaptan, a volatile liquid with a strong, pungent odor characteristic and highly stable, making it difficult to decompose in the air. However, this compound has drawbacks because the resulting aroma is difficult to detect, thus tending to irritate breathing and reduce user comfort. Therefore, it is necessary to isolate compounds from more environmentally friendly natural materials to become alternative odorants in LPG to replace ethyl mercaptan. One natural material that can be a source of compounds with strong aroma characteristics is the Tagetes spp. plant, which contains thiophene in its roots and leaves, making it a natural source of strong-smelling compounds. The results of this study were that the largest yield was obtained from the root extract with petroleum ether solvent of 5.85%, a corrosion rate of 6.63 µg/cm2.hour, and an odor level of 42. The high yield directly correlates with elevated odor intensity without inducing excessive corrosion, demonstrating the potential of Tagetes spp. root extract as a superior and safe natural odorant candidate.
Analisis Performa Sistem Monitoring IoT Pada Pengujian Switch Cycle Lampu LED Dimas Tri Herfiantoro; Vicky Prasetia; Hera Susanti; Muhamad Yusuf; Sugeng Dwi Riyanto; Arif Ainur Rafiq
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Lamps have a limited lifetime and may experience performance degradation due to repeated on–off operations (switch cycles). However, most developed testing devices are still focused on recording the number of cycles without integrating real-time monitoring of electrical and temperature parameters within a single Internet of Things (IoT)-based system. This research aims to design and develop an IoT-based lamp switch cycle testing device connected to an Android application through the Blynk platform. The developed system uses an LDR sensor for light detection, a PZEM-004T sensor for measuring voltage, current, and power, and an MLX90614 sensor for temperature monitoring. The ESP32 microcontroller acts as the main control and data communication unit. The tested parameters include switching cycles, temperature, voltage, current, and power, which can be monitored in real-time through an LCD and the Blynk application. The test results show that the 5 W LED lamp achieved 192,395 cycles with an average temperature of 37.5°C, voltage of 221.5 V, current of 0.018 A, and power of 4.03 W. The 9 W TL LED lamp reached 226,039 cycles with a temperature of 31°C, voltage of 221.7 V, current of 0.031 A, and power of 6.64 W. The system is equipped with electrical protection features and an automatic reset mechanism, enabling safe and continuous testing. This research provides an integrated system for evaluating lamp durability and performance characteristics through real-time monitoring of switch cycles, electrical parameters, and temperature.
Analisis Proses FSW dan PWHT Material Aluminium Terhadap Kekuatan Tarik, Kekerasan dan Mikrostruktur Wahyu Ari Putranto; Khaeroman Khaeroman; Heri Kiswanto; Ngatmin Ngatmin; Prijo Harsono; Purwanto Purwanto
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Friction Stir Welding (FSW) is a welding method that does not use filler materials. FSW has been widely used in the maritime industry. The purpose of this study is to analyze the effect of FSW joints before and after Post Weld Heat Treatment (PWHT) on 5052 and 6061 aluminum alloy materials. The FSW parameters include a spindle speed of 1500 rpm (clockwise), a travel speed of 30 mm/min, a tool depth of 0.2 mm, and a tool tilt angle of 1°. The PWHT parameters involve heating the FSW material to 550°C, with holding times of 45 and 90 minutes, followed by water quenching. The subsequent process is artificial aging up to a temperature of 200°C for 6 hours. The materials were then subjected to tensile testing, hardness testing, and micrographic examination. The results showed that the highest values were achieved using FSW parameters with 90 minutes of PWHT, yielding the maximum tensile strength and hardness values of 264 MPa (27.5%) and 89.6 HV (37.4%). Furthermore, the smallest and most uniform grain size was quantitatively observed at 4.9 µm in both the weld zone and the base metal.
Evaluasi Performa Alat Uji Bending Sederhana untuk Pengujian Sambungan Las Baja Karbon Rendah Ike Anggraini Subono; Aulya Putri Wardani; Ipung Kurniawan; Ulikaryani Ulikaryani; Joko Setia Pribadi; Dian Prabowo; Pujono
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Bending testing is a method used to evaluate the quality of welded joints; however, the limited availability of Universal Testing Machines (UTMs) can hinder testing and educational activities. This study aims to evaluate the performance of a simple bending test apparatus based on its ability to generate loading data, measurement result consistency, responsiveness to welding parameter variations, and preliminary alignment with data from previous studies. The tests utilized low-carbon steel specimens (6 mm thick) welded via the SMAW method using 3.2 mm diameter E7016 electrodes at current settings of 110 A and 120 A. Testing employed face-bending and root-bending configurations, with four specimens tested for each. Maximum loads were recorded using a load cell integrated with an HX711 module and Arduino, and subsequently used to calculate bending stress. Analysis was based on mean values, standard deviation, the coefficient of variation (CV), and visual inspection for cracks in the Heat-Affected Zone (HAZ). Results indicated bending stresses ranging from 553.8 to 794.7 MPa. Mean face-bending stress increased from 599.70 MPa at 110 A to 729.45 MPa at 120 A, while mean root-bending stress rose from 632.73 MPa to 740.63 MPa. CV values ranged from 2.45% to 10.86%. Comparisons with previous research revealed deviations of 50.17% at 110 A and 43.72% at 120 A. The findings demonstrate that the apparatus is capable of generating quantitative data and capturing changes in bending response; however, direct validation against a standard UTM is still required to determine measurement accuracy.
Analisis Komparatif Respons Dinamik Sistem Lintasan Kereta pada Track Lurus dan Melengkung Berbasis Simulasi Numerik Agus Susanto; Hanum Arrosida; Wahyu Pribadi; Yorrys Firdausi
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

The dynamic response of the wheel–rail–sleeper system is influenced by track geometry and operational parameters, particularly train speed. This study analyzes and compares the dynamic response of railway track systems on straight and curved tracks using a dynamic modeling and simulation approach. The system is represented as a multi-degree-of-freedom mass–spring–damper model capturing the interaction between wheel, rail, and sleeper. Simulations are conducted using the Runge-Kutta method at speeds of 20, 60, and 120 km/h. Analysis in both time and frequency domains is performed to identify vibration characteristics and resonance behavior. Results indicate that curved tracks produce higher vibration amplitudes due to centrifugal forces and uneven load distribution. The difference in spectral amplitude between straight and curved tracks remains small at 20 km/h, but increases significantly at 60 km/h and 120 km/h. At the highest speed, the wheel and rail amplitude on the curved track reaches 80 m/s² compared to 28 m/s² on the straight track, while the bearing amplitude increases from 1.1 m/s² to 3 m/s². These findings indicate that the influence of track geometry becomes more significant as train speed increases. Increasing speed significantly amplifies system response and leads to a tendency toward partial resonance at higher speeds. Moreover, frequency energy distribution becomes more complex, especially on curved tracks. These findings emphasize the importance of considering track geometry and speed in railway track design.
Effects of Increasing Mangrove Bioethanol Content on Exhaust Gas Temperature and Exhaust Emission Characteristics of a Spark-Ignition Engine Syarifudin Syarifudin; Eflita Yohana; Muchamad Muchamad; Suhartana Suhartana; Firman Lukman Sanjaya; Faqih Fatkhurrozak; Mukhamad Khumaisi Usman
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Green Gasoline Mangrove was produced by blending gasoline with 5%, 10%, and 15% (v/v) mangrove bioethanol. Owing to its higher Research Octane Number (RON) and oxygen content than neat gasoline (G100), this fuel has the potential to improve combustion quality while producing cleaner exhaust emissions. This study aimed to investigate the effects of Green Gasoline Mangrove on the exhaust emission characteristics of a spark-ignition engine. Experimental tests were conducted using a spark-ignition engine mounted on an engine test bench under stationary operating conditions, while exhaust emissions were measured using an integrated gas analyzer. The results showed that increasing the bioethanol concentration was associated with higher NOx emissions and lower CO and HC emissions, accompanied by an increase in Exhaust Gas Temperature (EGT), indicating more complete combustion. At an engine speed of 5000 rpm, NOx emissions were 6.54%, 8.65%, and 11.81% higher for GM5, GM10, and GM15, respectively, whereas CO and HC emissions consistently decreased with increasing bioethanol content. In addition, EGT increased from 337°C for GM5 to 377°C for GM15. These findings indicate that Green Gasoline Mangrove enhances combustion characteristics and reduces CO and HC emissions; however, these improvements are accompanied by an increase in NOx emissions due to the higher combustion temperature.
Desain dan Implementasi Reverse Vending Machine Botol Plastik Menggunakan Mikrokontroler dan Smartphone Thoriq Al Mubarok Nur Khoiri; Arif Sumardiono; Supriyono Supriyono
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

The growing issue of plastic bottle waste necessitates technological innovation to support recycling programs. This research involved developing a Reverse Vending Machine (RVM) prototype capable of identifying plastic bottle sizes, accompanied by a smartphone application for users. The application was designed to track the number of plastic bottles deposited, manage the resulting credit balance, and facilitate purchases using that balance. Transactions are conducted via a barcode system for items provided by the RVM owner. A prototype engineering method was employed to design and implement the RVM system. Following the design phase, the RVM was implemented and functionally tested. Testing covered the three ultrasonic sensors used in the bottle scanning system, the bottle size identification system, communication between the RVM and the application, and the application's transaction capabilities using the accumulated credit. Test results demonstrated accuracy rates of 98.82%, 98.28%, and 98.63% for the three ultrasonic sensors, confirming their suitability for the bottle scanning system. The RVM system successfully classified bottles in the 500–700ml and 1.5L ranges, utilizing samples comprising four size categories and seven plastic bottle brands. Furthermore, the results confirmed successful communication between the RVM and the application, as well as the application's functionality for processing transactions.

Page 71 of 71 | Total Record : 707

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