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Journal of Electrical Technology UMY
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 25501186     EISSN : 25806823     DOI : 10.18196/jet
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Library & Information Science
The Journal of Electrical Technology UMY (JET-UMY) is a peer-reviewed journal that publishes original theoretical and applied papers on all aspects of Electrical, Electronics, and Computer Engineering.
Arjuna Subject : -
Articles 115 Documents
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Voice Recognition Security Reliability Analysis Using Deep Learning Convolutional Neural Network Algorithm Wahyu Ibrahim; Henry Candra; Haris Isyanto
Journal of Electrical Technology UMY Vol 6, No 1 (2022): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i1.14281

Abstract

This study discusses the reliability analysis of voice recognition security using the deep learning convolutional neural network (CNN) algorithm. The CNN algorithm has learning advantages in that it is safer, faster, and more accurate. CNN also can solve user identification problems in large amounts of data. The measured voice input is ten types of user's voice with the number of iterations of 6000, 12000, and 15000 sound files. Furthermore, voice extraction features are performed to recognize conversations and retain information that is very much needed. After that, the voice file iteration data is trained to register the user's voice so that a trained model is obtained. These results measure performance (confusion matrix) to analyze the actual value compared to the predicted value in the CNN algorithm. The results obtained are that the best accuracy is obtained at 15000 sound file iterations, 96.87%, 12000 sound file iterations get 96.30%, and 6000 sound file iterations get 95.77%. CNN's performance data shows that 15000 iterations of voice files produce high accuracy. Voice recognition security helps provide high security and maintain the privacy of one's identity.
Hybrid Energy Storage Performance Evaluation of Fuel Cell Injection on Standalone Photovoltaic System Indah Sulistiyowati; Jamaaluddin Jamaaluddin; Izza Anshory
Journal of Electrical Technology UMY Vol 6, No 1 (2022): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i1.14841

Abstract

In this research, some performance evaluations of battery as the main storageand supercapacitor as the supporting storage in a hybrid energy storage system werecarried out to determine the recommendations of whether fuel cells could be integratedinto a standalone photovoltaic system. In previous studies, the fuel cell circuit was judgedto be quite different by integration with a standalone photovoltaic system, and in thisstudy, observations were made on aspects of power quality such as voltage, current, andpower for the two energy storage systems. The research method is using simulation as themedium with several self-definition aspects on photovoltaic, fuel cell, battery, andsupercapacitor, also with their parameters. The result shows that on the battery, the fuelcell integration has no particular effect since the battery is the main storage, and thevoltage and current had minor perturbation. While in a supercapacitor, majorperturbation from the system had been absorbed due to the fuel cell integrationcharacteristic of giving major perturbation to the system. The main recommendation is bychoosing supporting storage instead of using both supercapacitors and fuel cells.
An Inventory Tool for Receiving Practicum Report Based on IoT by Using ESP32-CAM and UV Sterilizer: A Case Study at Muhammadiyah University of Sidoarjo Shinta Carolin Stevi Yanti; Indah Sulistiyowati
Journal of Electrical Technology UMY Vol 6, No 1 (2022): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i1.14607

Abstract

Currently, there are several problems related to practicum report collection inthe electrical engineering laboratory at the Muhammadiyah University of Sidoarjo. The firstproblem is the presence of crowds during practicum report collection that have theirdangers, specifically during the Covid-19 pandemic. Another problem is the absence oflaboratory assistants in the electrical engineering laboratory when there are students whowill collect reports. A tool that can receive practicum reports was made from these problems,and it can be monitored remotely by a laboratory assistant. By putting an RFID card to theRFID sensor on the box so that the solenoid can open the box door and the student can putthe report into the box. At the same time, ESP32-CAM takes pictures of students collectingthe report. Then, notification in the form of photos and student information will be sent tothe laboratory assistant through the Telegram application. After the report is placed into thebox, the UV Sterilizer will turn on to disinfect the report. The expectation of making this toolis to facilitate the collecting report process of practicum results and reduce the crowd in thelaboratory.
Design of Monitoring Device for the Process of Organic Waste Decomposition into Compost Fertilizer and Plant Growth through Smartphones based on Internet of Things Smart Farming Haris Isyanto; Jumail Jumail; Rahayu Rahayu; Nofian Firmansyah
Journal of Electrical Technology UMY Vol 5, No 2 (2021): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v5i2.12815

Abstract

Based on data published by the Ministry of Living Environment and Forestry in 2020, Indonesia produces at least 93,200 tons of waste per day in various types of composition or around 34 million tons of waste per year. From the collection of waste, it could be used as compost fertilizer which is taken from leaf waste. From these problems, a device was designed that could monitor the decomposition process of organic waste into compost fertilizer. This device is equipped with a temperature sensor, humidity sensor, sensor of soil pH, soil moisture sensor, and color sensor to monitor the composting fertilizer process. The device could also detect plant growth as an indication that the compost fertilizer made is in good condition. Our device was used on the Internet of Things (IoT) and the blynk application as a monitoring application. From the test results, the temperature sensor's accuracy is 98.2%, the humidity sensor is 96.1%, the soil pH sensor is 95.26%, the soil moisture sensor is 98.55%, and the color sensor successfully detects the results of plant growth well. The design of this device is expected to invite the public to be wiser in sorting waste and using it for the surrounding environment.
Performance Analysis and Comparison of Non-Inverting Buck-Boost Converter Using PI, OCC, and Hybrid OCC-PI Control Ahmet Karaarslan; Ali Shaibu
Journal of Electrical Technology UMY Vol 6, No 2 (2022): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i2.15756

Abstract

The study compares and analyses the performance of the one-cycle control (OCC), hybrid one-cycle-proportional integral control (OCC-PI), and the conventional PI control method applied to the non-inverting buck-boost converter. The hybrid OCC-PI control method combines the OCC and PI control techniques to provide a hybrid non-linear closed-loop control technique for regulating the buck-boost converter. The MATLAB/Simulink equivalent system model was simulated with design parameter variations using a wide input voltage range of 9 – 36 V, a nominal output voltage of 28 V, and a fixed switching frequency of 250 kHz to validate the control response speed, reliability, and robustness of the proposed control technique. The simulation results due to input voltage, output voltage, and load variations were carried out whiles recording the settling time, overshoots, efficiency, output voltage, and inductor current ripples due to each applied control technique. The simulation results indicated that the Hybrid OCC-PI control provides better response speed and a lower output voltage overshoot relative to the PI. It also provides better reference voltage tracking compared to the OCC control method. 
Design of Security System Device for Motorized Vehicles through the Telegram Messenger Application and Updating GPS Locations on Smartphones in Real Time with IoT-based Smart Vehicles Haris Isyanto; Husnibes Muchtar; Rasma Rasma; Adam Rasyid Dinata
Journal of Electrical Technology UMY Vol 6, No 2 (2022): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i2.16182

Abstract

Currently, the number of cases of motorized vehicle theft is increasing. Lack of double security, when left by the owner, is one of the factors that cause vehicles to be easily stolen. Based on these problems, we designed a motorized vehicle security system device that can monitor the condition and update the vehicle location with a smartphone through Global Positioning System (GPS). Furthermore, it can send an active alarm in the form of a buzzer alarm when there is an indication of the danger of vehicle theft. Furthermore, send notifications to the user so that the user immediately locks the vehicle by controlling it remotely in real-time through the Internet of Things (IoT)-based Smart Vehicle Security System using the Telegram Messenger Application and Google Maps (GMaps). The results of testing the response time show that the best performance is very responsive at 2.776 seconds in monitoring and controlling the vehicle. Moreover, the results of testing the vehicle distance position with GMaps and GPS obtained the best performance with a success rate percentage of 97.35% and an error rate percentage of 2.65%. It aims to make vehicle owners feel safe and comfortable and prevent motorized vehicle theft.
Design of Circular Patch Array Microstrip Antenna Using Slot for ISM Band Liya Yusrina Sabila; Anton Yudhana; Muhammad Miftahul Amri; Asra Akrima; Igo Putra Pratama
Journal of Electrical Technology UMY Vol 6, No 2 (2022): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i2.16514

Abstract

This paper presents a Microstrip Antenna Analysis for the ISM Band with a circular patch design with a radius of 17 mm at a frequency of 2,400 – 2.484 GHz. The fabricated array antenna has a very compact width and length of 9.5 x 7.5 cm each. Therefore, an increase in bandwidth on the monopole antenna can be applied to the array arrangement. So to get the best antenna design, two optimizations of antenna size changes are carried out during the simulation: optimization of patch radius and slot length. The radius variation is used to shift the frequency range and slot length for impedance matching, as seen from the S11 value of less than -10 dB. From each change, the best results are taken. Experiments get the best antenna simulation results and are then fabricated. From the measurement results on the fabricated antenna, the lowest S11 value is -19.602 dB, and the gain is 3.52 dBi. The slot technique's optimization process has successfully shifted the frequency to approximately 100 MHz and increased the bandwidth by about 5% or 40 MHz.
Design and Analysis of Solar-powered E-bike Charging Stations to Support the Development of Green Campus Slamet Suripto; Gilang Ari Widodo Utomo; Kunnu Purwanto; Karisma Trinanda Putra; Muhammad Yusvin Mustar; Mosiur Rahaman
Journal of Electrical Technology UMY Vol 6, No 2 (2022): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i2.16543

Abstract

Currently, conventional motorcycles that utilize hazardous fossil fuels are expanding rapidly in Indonesia's major cities. Especially in campus environments, the increase in motorcycle usage has the potential to raise emissions of greenhouse gases and toxic microparticles. The green campus concept entails that campus living must implement low-emission energy efficiency, conserve resources, and enhance environmental quality by teaching its residents how to live a healthy lifestyle. However, limiting the number of motorcycles on campus is the main challenge, especially in Indonesia. To overcome this challenge, this study provides a design for the e-bike system that will be implemented at Universitas Muhammadiyah Yogyakarta (UMY). In addition, a solar power plant is integrated into the design to support the adoption of the zero-emission green energy concept on the campus. The design accommodates specifications for a 6 km radius surrounding the school, a two-day lifespan, and 100 electric bicycles. The experiment's findings indicate that the solar-powered e-bike design requires 99 solar panels with a capacity of 150 Wp, 9 SSCs with a capacity of 100 A, and three inverters with a capacity of 2,500 W. It is projected that this device will reduce exhaust emissions by 7.62 tons of CO2 per year once it is entirely operated.
Design of PI and PID Control System for Induction Motor Control on Gamma Irradiator Characterization Prototype Using a Modified Ziegler-Nichols Method Rissa Damayanti; Beny Syawaludin; Hyundianto Arif Gunawan
Journal of Electrical Technology UMY Vol 6, No 2 (2022): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i2.16412

Abstract

The irradiator simulator's induction motor drive control system is carried out to maintain safety and accuracy in the loading/unloading process and product transportation system. Control is done by maintaining the speed of the induction motor at a certain speed so that the travel time for the loading/unloading process is predetermined. This study aims to answer the existing problems using the PI and PID control systems and prove that using the control system will give better results than the current system applications. In this study, the gain configuration for the PI controller that best fits the design requirements is obtained at a Kp value of 0.038, a Ki of 2.18, and a Phase Margin ( ) of 70°, resulting in a motor rotational speed that can achieve stability at the set point determined by the setting time is 0.90 seconds. The maximum overshoot is 0% and has a steady state error value of 0.00013. Then the gain configuration for the PID controller that best fits the design requirements is obtained at a value of Kp of 0.0066, Ki of 10.85, Kd of 9.9x10-7 and with a Phase Margin ( )  of 50°, resulting in a motor rotational speed that is high. Able to achieve stability at the specified set point with a setting time of 0.63 seconds and a maximum overshoot of 0%, the steady state error value of 0.00013. From the results obtained, it can be seen that this PI and PID control method can be used as an alternative control system on the induction motor drive system on the irradiator simulator. The controller can control the system according to the specified conditions so that the irradiation process time accuracy improves or increases.
Automatic Stove Control System Based on the NodeMCU ESP8266 Microcontroller Muhammad Nauval Khoiron Hamdani; Indah Sulistiyowati; Shazana Dhiya Ayuni
Journal of Electrical Technology UMY Vol 6, No 2 (2022): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i2.16308

Abstract

A stove is a handy tool for humans. The use of stoves in everyday life brings beneficial and detrimental impacts. A stove is a tool used to help human activities, but the impact of its weakness can cause household accidents caused by the negligence of the community itself. The NodeMCU-based automatic hob was built to address this problem. This stove can set the cooking time and automatically stop working at the specified time. This stove can also turn off automatically if the sensor does not detect the presence of people around to minimize the occurrence of household accidents. This automatic stove is expected to be a technological reformer in household appliances and a solution to reduce the number of accidents caused by stoves.

Page 10 of 12 | Total Record : 115

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