JTEIN: Jurnal Teknik Elektro Indonesia

Design of a Monitoring Device and System for Measuring Heart Rate, Oxygen Saturation and Body Temperature Based on the Internet of Things (IoT)

Yoslina Hutahaean, Dini Shafira Hapsari, Dian Rusdiyanto — Tue, 11 Feb 2025 07:13:18 +0000

Medical technology have developed rapidly. This is conducted to support health services and prevent the worst conditions that can be experienced by someone who has health problems. This research proposes medical devices based on internet of things (IoT). The proposed device is an integrated system with sensors to detect body temperature, heart rate and oxygen saturation. The sensor reading results can be seen via the LCD and monitored via the website. Sensors and IoT systems use Arduino, where the sensors used are the MAX30100 sensor and the MLX90614 sensor. Meanwhile, the Wemos D1 mini is used to send sensor reading data to the website. To validate the performance of the tool, a comparison was carried out using an oximeter and a thermometer. The test results showed that the difference in oxygen saturation and body temperature readings was no more than 1%, while the difference in heart rate readings had an average difference of 1.13%. Monitoring on websites in real time is able to read sensor detections with a time lag from the tool to the website of around 5 seconds. The research results show that the design of the tool is in accordance with the desired specifications and can be applied in the health sector.

Home Security System by Three Methods Using Arduino Nano Based PV Energy Source

Wed, 12 Feb 2025 00:00:00 +0000

The existence of technology today aims to help make human work easier, including in the aspect of residential security systems. The increase in crime, especially theft in residential homes, is increasingly worrying. Therefore, the application of Arduino Nano control system technology with other supporting systems is the right solution to improve the safety of residents and minimize theft. This research aims to design a device called Home Security System by Three Methods that uses PV energy sources and the Arduino Nano control system. This tool features three security methods: SMS gateway, phone call, and alarm sound in two locations. Tests were carried out by simulating the opening and closing of doors/windows, then paying attention to the system response on the smartphone and the two alarms. The test results show that when a door/window is opened, the system sends an alert SMS to the user's smartphone within ± 9 seconds. The alarm sounds inside the house and the security post. If the user does not respond, the system will make a phone call within ± 55 seconds after the door/window is opened. The system works based on the movement or gap in the door/window using a magnetic switch sensor of ± 2.5 cm.

Design of an Automatic Cooling System for Microcontroller-Based Solar Panels

Nurul Azizah, Doni Tri Putra Yanto, Ali Basrah Pulungan, Citra Dewi — Wed, 12 Feb 2025 08:08:24 +0000

The increasing need for electrical energy and its central role requires electrical energy suppliers to find new plants in order to meet consumer needs and avoid an electrical energy crisis. Utilization of solar energy through solar panels is an alternative to meet these needs. However, in the process of converting solar energy into electrical energy, the temperature of solar panels increases, causing the performance and efficiency of solar panels to decrease. Solar panels can produce the best power at temperatures of 25^oC-35^oC. When there is an increase in temperature by 1 ° C, the power generated decreases by 0.4%. An automatic cooling system is a solution that can be used to prevent the solar panel temperature from exceeding its optimal temperature limit. The solar panel cooling system made works on 10Wp solar panels with control from Arduino Uno, with inputs in the form of ACS712 sensors, DC voltage sensors, DHT11 sensors and RTC DS3231. The outputs are relays, LCD and micro-SD module. The methodology used in the research involves the design, implementation, and testing stages of the system prototype. After testing the prototype in the form of a comparison between solar panels with a cooling system and without a cooling system. It was found that when using a cooler, the average power generated was 9.1W. While solar panels without cooling can only produce an average power of 2.5W. This proves that the cooling system made can increase the output power.

Reliability Analysis of OCR Relay with ETAP 19.0.1 Simulation to Anticipate Disturbances in Bemo Feeders at the Cawang Lama Substation

Lukman Aditya, Eriawan Eriawan, Abdul Kodir Albahar — Thu, 13 Feb 2025 02:50:24 +0000

The protection system is an important part of the electricity distribution system. Setting the protection relai is a significant procedure that must be ensured properly, so that the relai can work optimally when it experiences interference. If the disturbance is not cut off by the OCR Relay on the feeder, it could result in the incoming tripping, effecting in losses to PLN. Analysis is carried out to determine the reliability of the over current relai (OCR) so that the electric power system remains stable. The relay used by the Cawang Lama Substation is Standard Inverse, where the greater the fault current, the faster the relay working time and vice versa. In this research, simulations were carried out using ETAP 19.0.1, testing and calculations. ETAP simulation shows that protection coordination is appropriate. The relai on the feeder trips first with a time setting of 0.15 s for over current (OC) and 0.2 s for moment over current (MOC), then at incoming 0.24 s for OC and 0.5 s for MOC. The results obtained from the analysis of relay working time on the Bemo feeder up to the power breaker trip (PMT), namely 0.256 s using calculations, 0.275 s using Current Injector, and 0.260 s using ETAP simulation. From a comparison of the working time of the relay, it’s obtained between 0.04 s - 0.019 s, and this value is still considered proper

Performance Comparison of Resistance Temperature Detector and Liquid Filled Thermometer on Turbine Guide Bearing at Siguragura HPP.

Fajar Nur Prayitno, Rahmaniar Rahmaniar, Siti Anisah — Thu, 06 Mar 2025 03:15:33 +0000

The Turbine Guide Bearing (TGB) is a critical component at the Siguragura Hydroelectric Power Plant (HPP), responsible for ensuring the turbine shaft rotates on its axis, allowing the turbine to operate efficiently without excessive heat buildup that could lead to failure. This requires continuous temperature monitoring of the Turbine Guide Bearing. The temperature sensors used for this monitoring are the Resistance Temperature Detector (RTD) and the Liquid Filled Thermometer. These two sensors operate based on different mechanisms, making it essential to analyze their performance to ensure compatibility and maintain the accuracy and reliability of temperature measurements. Based on calibration and field testing results, the RTD sensor demonstrated more accurate and stable temperature readings, with a minimal deviation from the standard and linear, non-fluctuating results. On the other hand, the Liquid Filled Thermometer was more responsive, with a faster response time to reach the reference temperature. Therefore, the most suitable sensor for measuring the temperature of the Turbine Guide Bearing at Siguragura HPP is the RTD as the primary sensor, while the Liquid Filled Thermometer can serve as a redundant sensor.