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The advancement of automotive technology has accelerated the adoption of renewable‑energy‑based electric vehicles, including the integration of solar panels on electric scooters. Indonesia’s tropical climate provides abundant solar energy potential; however, the limited surface area of scooters often restricts panel placement to the footrest section. This study aims to evaluate the impact of using a 10 mm clear acrylic cover on the performance of a 50 Wp monocrystalline solar panel in an electric scooter battery‑charging system. An experimental method was employed by comparing the panel’s performance under two conditions: without a cover and with the acrylic cover installed. Key parameters observed included voltage, current, and charging power, recorded using a data logger. Tests were conducted for 30 minutes under varying solar radiation intensities. The results indicate that the acrylic cover reduces the panel’s output power, from 55 W to 45 W at a solar radiation intensity of approximately 1100 W/m². These findings suggest that the use of an acrylic cover must be carefully considered to maintain optimal charging system performance.

The advancement of automotive technology has accelerated the adoption of renewable‑energy‑based electric vehicles, including the integration of solar panels on electric scooters. Indonesia’s tropical climate provides abundant solar energy potential; however, the limited surface area of scooters often restricts panel placement to the footrest section. This study aims to evaluate the impact of using a 10 mm clear acrylic cover on the performance of a 50 Wp monocrystalline solar panel in an electric scooter battery‑charging system. An experimental method was employed by comparing the panel’s performance under two conditions: without a cover and with the acrylic cover installed. Key parameters observed included voltage, current, and charging power, recorded using a data logger. Tests were conducted for 30 minutes under varying solar radiation intensities. The results indicate that the acrylic cover reduces the panel’s output power, from 55 W to 45 W at a solar radiation intensity of approximately 1100 W/m². These findings suggest that the use of an acrylic cover must be carefully considered to maintain optimal charging system performance.

The development of embedded sistem technology is now widely used to support automatic environmental data recording processes, such as temperature, humidity, and air pressure. However, most existing weather data loggers still operate independently and are not directly connected to a computer. As a result, data collection and processing must be done manually, which is less efficient and prone to data loss. The main problem in this research is the lack of integration between microcontroller-based data loggers and simple computer operating sistems such as the Disk Operating Sistem (DOS), making it difficult to automatically store and access recorded data. This study aims to develop an embedded weather data logger sistem based on the AVR microcontroller integrated with DOS. The development process uses the waterfall model, consisting of sistem planning, requirement analysis, sistem design, coding, testing, and implementation. The designed sistem records weather parameters in real time and stores them in a file format that can be directly read by DOS without requiring additional conversion processes. The test results show that the sistem runs stably, records data accurately, and can be easily accessed through a computer. Integration with DOS allows data storage and retrieval processes to be faster and more efficient. Therefore, this sistem provides a practical solution for automatic weather monitoring that is reliable, time-saving, and easy to use in various environmental conditions.

A conveyor is a tool with a large rubber band arranged transversely between two pulleys at a constant speed as a transporter of solid material in this case coal with the provisions of the permitted amount. Damage to the conveyor tool has a major impact on the smooth running of a coal loading and unloading process, so a coal monitoring tool was designed using an ESP32 microcontroller-based data logger. The purpose of this study is to find out how to design a coal load monitoring tool based on a data logger using the Research and Development (R&D) method type ADDIE. Using the following types of testing: static and dynamic. The research results show that the load monitoring system based on a load cell and ESP32 microcontroller demonstrates high accuracy, with a reading deviation of less than 2% from the actual weight. The system is also considered effective, as it can detect loads, adjust the hatch door angle, and transmit data to Google Spreadsheet in real-time without disruptions. Its ability to adapt to varying loads indicates that the prototype operates stably, responsively, and in accordance with the design objectives.

Freon is one of the refrigerants used in refrigeration systems. The refrigeration system has a very important role, namely to preserve food ingredients so that food can last longer. The use of freon is not only used in ships but is widely found in home appliances in refrigeration systems used in freezers, air conditioners, refrigerators, and dispensers. If more freon is used, the negative impact that arises is greater, namely the depletion of the ozone layer and global warming which can have a bad influence on health, the life of living things and the environment. The purpose of this researcher is to create a tool to reduce the negative impact of freon use, namely by using peltier as a cooling medium with environmentally friendly thermoelectric modules. This study uses trial and error methods. Where the trial process is carried out by turning on one of the working push buttons and observing the temperature value. Then it is processed by the control system, namely Arduino Mega which will later provide a PWM output signal to the IRF540 mosfet when the output temperature value is in line with the reference value and vice versa. The test of this tool was carried out by comparing measurements between the author's prototype tool and the standard measuring tool, namely the digital thermometer. Based on the test results, this device can produce a minimum temperature of 140C at 30-minute intervals without any media. The trial using 330ml bottled water can reach a temperature of 170C within 30 minutes in the cooler box. This tool is also equipped with an automatic monitoring system using a PWM signal in the form of a change in fan speed, which is 255 RPS maximum speed and when getting a PWM signal it changes to 50 RPS. The percentage of errors resulting from the comparison of standard measuring instruments and sensor values had the highest and lowest percentages of 2.37% and 0.84% in cold dispersion conditions without charge. Then the highest and lowest error percentages were 1.69% and 0.72% in the state of containing a load of 1 330ml mineral bottle. This ptototype uses data recording using Micro-SD as a data logger.

In simplifying the process of monitoring the temperature of electric vehicle batteries, especially in discharging conditions, a remote electric vehicle battery temperature monitoring system was created. The problem with the previous monitoring system was that there was no electric battery temperature monitoring system, so users could not monitor the temperature condition of the vehicle battery when in use. The purpose of this study is to design an Internet of Things (IoT)-based electric vehicle battery temperature monitoring device system using the web and add a data logger to monitor battery temperature remotely and find out the difference in temperature values from the device with a thermogun. And the addition of a cut off feature when the battery overheats as one of the safety. The research method uses experiments, namely by comparing the speed between 30km/h and 50km/h and comparing the readings of the monitoring device with a thermogun. In proving the performance of the monitoring equipment, it is carried out with a distance of 1km, 2km, and 3km and in sloping road conditions. The data obtained were then analyzed using the paired T-test method. The results of the study showed that the tool worked quite well with the highest error value of 3.88%. And the battery temperature value between the speed of 30km/h and 50km/h is a significant difference with a P-value result of 0.035 which means that H0 is rejected and H1 is accepted.

Pharmaceutical Wholesalers (PBFs) have the responsibility to ensure that the quality of pharmaceutical products is maintained in accordance with Good Drug Distribution Practices (CDOB). One of the regulated aspects is related to the control of temperature-sensitive cold chain products. Product control must ensure product quality from receipt, storage to distribution to consumers. One of the efforts to ensure product quality during the delivery process is to conduct cold chain product delivery validation which aims to ensure product delivery remains at the appropriate range for patient safety. Delivery validation is carried out using Coolbox and Polyurethane box delivery media to compare the duration of the delivery media can maintain the temperature in the appropriate range and also ensure the necessary conditioning time before the product can be transferred to the delivery media. Also used are 4 icepacks, 5 icepacks and 6 icepack variations. Temperature is monitored for 1x24 hours, 2 x 24 hours and 3 x 24 during the standard delivery process. Temperature monitoring using a thermo logger and data processing using the Testo Comfort Software Basic 5.0 app. The results showed that Polyurethane Box using 5 icepacks could maintain the longest temperature of 49 hours and 40 minutes  

Capacitor bank is an arrangement of capacitors in series or parallel that can store energy temporarily and provide limited energy according to its capacity. Basically, a capacitor is composed of two parallel pieces called electrodes separated by a room called a dielectric which when given a voltage will store energy. The purpose of this study is to determine the effect of road slope and distance on charging in capacitor banks. In this study used a 2.7 V 500F capacitor and used a generator that has a specification of 300 watts. In this study using a quantitative experimental method that aims to determine the effect of road slope variations of 20⁰ and 25 ⁰ and with distances of 100m, 300m, 500m, 700m, and 900m. Testing is done by measuring the voltage on the capacitor bank using a multitester and indicator by utilizing a data logger and the percentage of voltage capacity on the capacitor bank. Furthermore, the data will be processed in the table using minitab. In the research results, it was concluded that the longer the distance traveled, the more the charging voltage value on the capacitor bank increased. For the effect of road slope on the voltage value on charging capacitor banks does not have a significant effect and for the effect of the interaction between road slope and distance has no effect on the voltage value.     

Sterilization is the eradication of materials, substances, or tools from various live microorganisms or their resting stages. Bacterial and fungal vegetative cells can be killed at a temperature of 60 °C within 5 to 10 minutes. A data logger is a tool used to monitor the temperature inside an autoclave. Previous research on "Autoclave Data Logger" aimed to assist in recording temperature activities within the autoclave. When the device is turned on, it automatically records the temperature inside the autoclave and stores the temperature data read on an SD card. After the sterilization process is completed, the SD card is retrieved for reading on a personal computer in Excel format or converted into a graph. Therefore, the author developed an IoT-based autoclave calibrator tool with data storage. This IoT-based autoclave calibrator tool with data storage utilizes the ESP32 microcontroller for programming and as a source in the IoT system. The ESP32 is used to control the input from the waterproof DS18b20 sensor, which functions to read or detect the temperature in the autoclave. The data read by the sensor will be displayed on the IoT platform, which is the Blynk IoT application, and after the results are displayed on the IoT platform, they will be stored on an SD card.      

Inductive loads on ships are loads that cause the power factor value to move away from 1.00, especially if the addition of this type of load exceeds the standard and the load is installed unbalanced, it can worsen the power factor value. A low power factor value results in soaring current values and reactive power, which often results in cable insulation burning and reduced efficiency. The aim of this research is to create a tool that can automatically correct low power factor values using a Capacitor Bank, PZEM-004T sensor and ESP32 controller at certain inductive loads and can monitor and record electrical load parameter data from various areas on the ship online and offline. This research uses a trial and error method. Based on the test results, this tool can automatically improve the power factor value of inductive loads in the form of TL lamps and electro motors to above 0.90 and the working current value of TL lamps can be reduced from 0.30-0.31 A to 0.17-0.18 A. Electro motors experience a decrease in current from 0.74-0.76 A to 0.66-0.68 A. This tool is also equipped with a system for monitoring and recording load parameter data using Google Spreadsheet when an internet connection is available. If an internet connection is not available, the recording will be transferred using Micro-SD.

Teknologi elektronika dalam komponen/elemen dasar elektronika maupun pada sebuah sistem terpadu. Penelitian-penelitian sebelumnya yang pernah dilakukan pada umumnya melakukan pengamatan besaran-besaran fisis dan perubahannya dengan menggunakan beberapa sensor. Salah satu untuk mendeteksi perubahan atas fenomena fisis yang terjadi dengan menggunakan sensor / transducer seperti LDR, PTC, NTC, ping, PIR dan lain sebagainya. Pengamatan perubahan fisis ini diperlukan untuk kebutuhan pengamatan dan analisa atas perubahan fisis suatu perangkat, sehingga dapat memberikan simpulan sementara atau prediksi terhadap tindak lanjut sistem dalam menangani perubahan tersebut. Perkembangan saat ini adalah penggunaan mikrokontroler Arduino yang merupakan keluarga dalam rangkaian terpadu ATMEL sebagai salah satu media bantu pengamatan perubahan fisis seperti suhu, kecepatan, jarak, tekanan dan lain sebagainya.Pada kesempatan penelitian ini tim peneliti berupaya untnuk melakukan visualisasi data terekam berkaitan dengan sistem logger. Pengamatan dilakukan dengan merekam data yang dikirim oleh papan Arduino oleh perangkat lunak komputer, yang pada kesempatan ini menggunakan MATLAB. Kemudian MATLAB akan memvisualisasikan dat yang diterima secara realtime dalam mode grafik.Hasil penelitian ini terfokus pada pengamatan dan analisa terhadap konsep antarmuka/interfacing antara mikrokontroler dan komputer, meliputi desain, rancang bangun dan pemrograman yang terlibat dalam suatu simulasi sistem kendali terpadu berbasis Arduino-MATLAB. Visualisasi data secara realtime diperoleh dengan mengkondisikan perangkat papan Arduino yang terhubung dengan sensor jarak (ultrasonik) untukmengirimkan data secara signifikan terhadap perubahan jarak yang ada, dan data ini kemudian direkam oleh variabel MATLAB dan menampilkannya dalam format grafik plot, yang terdistribusi dalam sumbu x mewakili jarak dalam centimeter dan sumbu y mewakili besaran waktu dalam detik. Hasil berjalan baik secara realtime dan sesuai dengan standar ukuran sebenarnya.