J-Eltrik

Rancang Bangun Smart Car Robotic Pendeteksi Kebocoran Gas dalam Pipa

Hendrianto — 2026-05-13

This research aims to design and develop a mobile gas-leak detection robot using the MQ-2 sensor, capable of operating in both automatic and manual modes to inspect areas with potential leakage. The system addresses the limitations of static detectors, which can only monitor a single point and are unable to cover long pipeline segments. The robot is built using an Arduino Nano as the main controller, an HC-05 Bluetooth module for remote control via an Android application, and an L298N motor driver to regulate DC motor movement. Testing was conducted by placing the robot inside a acrylic pipe simulating a leaking pipeline, allowing gas concentration readings to be collected from multiple positions. Results indicate that the system successfully detects increased gas concentration as the robot approaches the leak source. The manual mode enables users to direct the robot toward specific locations, while the automatic mode provides stable motion along the test path. Bluetooth integration performs reliably within a 5–10 meter control range. Overall, the robot demonstrates effective performance as a mobile inspection platform, offering greater flexibility, responsiveness, and information richness compared to static gas-leak detection systems.

Rancang Bangun Miniatur Prototype Aircraft Towing Tractor (ATT) berbasis Arduino menggunakan Sensor Garis

Rahmat Putra Adi Wijayanto — 2026-05-13

An airport is a complex consisting of the landside and the airside. The airside is a crucial part of airport operations because it encompasses ground handling activities. Ground handling activities are primarily carried out on the apron. Aircraft towing tractors (ATTs), in particular, are vital equipment for aircraft operations in the hangar and on the apron. ATTs are used to tow or push aircraft while on the ground. The majority of these vehicles are still operated by humans. Furthermore, those operating ATTs must have a special permit. In reality, very few people have the permit to operate ATTs, leading to working hours exceeding the standard 8-hour workday. Based on the description, the problem in this research is how to reduce the workload of ATT operators due to the limited number of licensed operators so that it can reduce the occurrence of work accidents due to fatigue in operators. In addition, this research aims to reduce the workload of ATT operators due to the limited number of licensed operators by creating an Arduino-based ATT prototype that can run automatically according to a predetermined path. This tool will function as one of the devices that work in the apron area which is used to push the aircraft from the apron to the taxiway when taking off. The results of the study obtained the maximum load that can be pushed by this tool is 3 Kg. Meanwhile, for testing line sensors and others, it produces very good accuracy, reaching 100%.

Analisis Pengoptimalan Pengoperasian dan Daya Watermaker Guna Memenuhi Kebutuhan Air Tawar di Kapal Arenui Cruise

M. Toeyeb — 2026-05-13

Freshwater supply plays a crucial role in supporting ship operations, particularly on cruise vessels where water consumption is relatively high. Onboard Arenui Cruise, freshwater is produced using a reverse osmosis (RO) watermaker system. Although the system is capable of supplying freshwater from seawater, its operation may lead to inefficient energy usage if not properly managed. This study aims to evaluate the operational performance of the watermaker system, focusing on freshwater production capacity, electrical power consumption, and energy efficiency, as well as to propose optimization measures for improved operation. The research was conducted using a descriptive analytical method with a case study approach, based on operational data collected over a six-day observation period onboard Arenui Cruise. The analyzed parameters include freshwater production volume, daily freshwater demand, electrical power usage, and specific energy consumption (SEC). The results show that the average freshwater production of 2.92 m³ per day is sufficient to meet the ship’s daily freshwater requirement of 1.9 m³ per day. However, the average SEC value of 40.67 kWh/m³ indicates that the watermaker system operates with relatively low energy efficiency. Based on these findings, several optimization strategies are proposed, including adjustments to operational practices, improved maintenance of key components, and the development of a standard operating procedure (SOP) for watermaker operation and maintenance. The implementation of these measures is expected to enhance energy efficiency and ensure a reliable freshwater supply onboard Arenui Cruise.

Sistem Fire Alarm Berbasis Mikrokontroler ESP32

M Husni Mubarak — 2026-05-13

An early fire detection system is a critical component in the implementation of occupational safety and health, particularly in mining environments that present a high risk of fire hazards. PT Putra Perkasa Abadi, as a mining service company, requires a smoke detector monitoring system capable of operating in real time, providing accurate information, and supporting effective fire prevention measures. However, field implementation still encounters several challenges, including limited manual monitoring, sensor performance degradation due to dust accumulation, and the absence of a centralized and continuous smoke detector reporting system. This study aims to design and develop a microcontroller-based smoke detector monitoring system that is capable of automatically monitoring sensor conditions, providing early fire warnings, and recording periodic changes in sensor status. The proposed system utilizes a microcontroller as the main data processing unit, a smoke detector sensor to identify the presence of smoke, and a communication module to display sensor status through an LCD and digital interface. System testing was conducted directly in the operational environment of PT Putra Perkasa Abadi Site BIB to evaluate the reliability and performance of the system under real working conditions. The results indicate that the developed monitoring system is able to provide accurate readings of smoke detector conditions and transmit sensor status information in real time with fast and stable responses. The implementation of this system improves monitoring effectiveness and minimizes the risk of delayed fire detection. Therefore, the proposed system can serve as an alternative solution to enhance occupational safety systems and support fire prevention programs in the mining industry.

Desain Bidirectional DC-DC Converter untuk Solar Charge Controller dengan Kontrol PI

Choirul Anam Iskak — 2026-05-13

The increasingly apparent limitations of fossil fuel sources are driving the increased use of unstable and intermittent renewable energy sources. To maintain a continuous supply of electrical energy, energy storage systems such as batteries are a crucial component. However, the output voltage from the energy source or storage device does not always match the voltage required by the load. Therefore, a power electronics circuit in the form of a bidirectional DC-DC converter is required, capable of regulating the power flow in both directions: from the source to the battery (charging) and from the battery to the load (discharging). In this research, a bidirectional DC-DC converter system was developed, equipped with a Proportional-Integral (PI) controller to regulate the output voltage to match the setpoint voltage. Simulation results show that the designed system is capable of maintaining a stable output voltage and in accordance with the reference value, both under conditions of load changes and resource fluctuations. This system is expected to support the development of an efficient, adaptive, and sustainable electricity grid.