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Progam Studi Teknik Elektro, Fakultas Teknik Universitas Muhammadiyah Surakarta Jl. Ahmad Yani, Pabelan, Kartasura, Surakarta 57162 Telp: 0271-717417 Ext.: 3223
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Emitor: Jurnal Teknik Elektro
Published by Universitas Muhammadiyah Surakarta
ISSN : 14118890     EISSN : 25414518     DOI : https://doi.org/10.23917/emitor
Core Subject : Engineering,
Engineering
Emitor: Jurnal Teknik Elektro merupakan jurnal ilmiah yang diterbitkan oleh Jurusan Teknik Elektro Fakultas Teknik Universitas Muhammadiyah Surakarta dengan tujuan sebagai media publikasi ilmiah di bidang ke-teknik elektro-an yang meliputi bidang Sistem Tenaga Listrik (STL), Sistem Isyarat dan Elektronika (SIE) yang meliputi Elektronika, Telekomunikasi, Komputasi, Kontrol, Instrumentasi, Elektronika Medis (biomedika) dan Sistem Komputer dan Informatika (SKI).
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 65 Documents
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Implementation of the Viola-Jones Algorithm for a Hand Sign Language Translation System Atik Novianti; Siti Nurul Muthiah; Asep Mulyana
Emitor: Jurnal Teknik Elektro Vol 24, No 2: July 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i2.3966

Abstract

People who speech impaired that uses body movements to deliver information. In everyday life, it is not uncommon for people with disabilities to communicate with normal people who do not understand the meaning of what is delivered. One example is when a speech-impaired person wants to order food at drive-thru service fast food restaurant, the seller must have special skills to understand what is being delivered. In this paper, we will discuss the application of the Viola Jones algorithm for hand gesture detection systems in drive-thru service fast food restaurant. The Viola Jones algorithm was proposed because the algorithm is the most famous and best choice of gesture classifier for detecting hands in real time based on the accuracy speed. The system is able to translate the given gestures, data enters Firebase as a real time database, sellers can find out the total shopping through the cashier application. The system cannot translate the gesture if the given hand is not completely in the specified area of the box. Based on testing on 10 different respondents, the system can detect hand gesture with an average system success of 92,01%.
Design and Development of a Body Fat Percentage Measurement System Using the Bioelectrical Impedance Analysis (BIA) Foot-to-Foot Method Febrian Ruciyanti; Budi Sumanto
Emitor: Jurnal Teknik Elektro Vol 24, No 2: July 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i2.4017

Abstract

A person's nutritional status is ideally determined based on a body composition assessment, which differentiates the fat mass and fat-free mass in a human body. Fat and fat-free mass can be calculated using a non-invasive method called bioelectrical impedance analysis (BIA). In this research, a body fat measurement system was designed using the BIA foot-to-foot method, which is also equipped with the automatic body mass and height measurements system using a load cell sensor and a ToF VL53L1X sensor. The BIA method is designed to flow a 0.4mA current with a frequency of 50kHz into the body using four electrodes through the object’s feet. Other parameters required in this system, such as age and gender, will be entered using the keypad. The computing and data processing process uses an Arduino Nano microcontroller and is displayed on the LCD. The system that has been designed is then compared with a similar measuring instrument, Mi Scale Body Composition 2. The results obtained in this study are: the average error value for measuring body weight is 0.43kg; the average error for measuring height is 1.13cm; the average error in measuring BMI is 0.32 kg/m2; and the average error in measuring body fat percentage is 3.25%.
Implementation of Fuzzy Method towards Hydroponic Smart Showcase Innovation Sembiring, Sarmayanta; Exaudi, Kemahyanto; Prasetyo, Aditya PP; Rendyansyah, Rendyansyah; Nadhira, Wardha
Emitor: Jurnal Teknik Elektro Vol 24, No 3: November 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i3.4043

Abstract

Hydroponics is a technique that allows easy cultivation of fresh and hygienic vegetables, even with limited space. Recent innovations in hydroponic development have resulted in a smart showcase prototype, which is controlled using Sugeno fuzzy techniques. This prototype uses a DC fan to maintain a stable temperature and humidity level. This invention is both ecologically friendly and portable, making it suitable for a wide range of users, including apartment residents. Experimental results using the fuzzy method show that this prototype can effectively support indoor hydroponic techniques, with fan rotation ranging from 180 to 255 rpm based on variations in room temperature and humidity. The showcase successfully maintained a stable temperature range of 28–30 °C and a humidity of 60–70% RH. In addition, out of 12 vegetable samples tested for 14 days, 7 kale stems showed significant growth. Overall, this smart showcase prototype offers the potential to bring hydroponics indoors and promote fresh vegetable cultivation.
Android Smartphone Application to Control Home Lights Based on ESP8266 and IoT Rendyansyah, Rendyansyah; Yoggi Rahmawan
Emitor: Jurnal Teknik Elektro Vol 24, No 3: November 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i3.4072

Abstract

A house often lived in due to someone going to work all day or even on holiday outside the city. There must be a special strategy to activate the lights at night and deactivate the lights during the day. A smart device that can help as a position to turn on and turn off the house lights. Home lights can be controlled remotely using an Android smartphone and IoT internet network. The system is designed on a prototype scale; there are four AC-powered lamps, namely two lamps, each installed inside and outside the house. The ESP8266 microcontroller is a data processing medium for communication from Android smartphones to lighting devices. Utilizing the IoT system to connect the smartphone to the Internet and the ESP8266 forms a system that can be accessed remotely. The Android application on the smartphone has four buttons, namely from light-1 to light-4. All lights can turn on and off on command. When testing a system connected to Firebase, the system can respond well and from a long distance while connected to the Internet. The system response in turning the lights on and off is ±4 seconds, and the longest distance is ±10 km. All control buttons in this system application can function properly according to their function to control home lights by sending data in the form of logic high or logic low to Firebase. This Android-based home light control uses the Internet network, making it easier to turn on or off the house lights while connected to the Internet network.
Analysis of the Influence of Soil Resistance on the Substation Grid Grounding System Fitriani, Ayu; Anwar Syahputra, Syofyan; Hidayat, Jhoni
Emitor: Jurnal Teknik Elektro Vol 24, No 3: November 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i3.4136

Abstract

The grounding system is one of the security systems in substations to channel excess voltage caused by lightning strikes that occur at substations, as well as electrical equipment. To design a grounding system, several factors must be considered, including the type of soil, the configuration of the grounding system, the resistivity of the soil, and the condition of the surrounding environment. This research aims to determine the safe limit in the substation grounding system which is influenced by the type of soil in the emergence of touch voltage and step voltage which can be dangerous to humans. The method used is simulation with the Finite Element Method (FEM). The overall result is that with variations in area and soil type, the highest resistance values and touch and step stress values are found in rocky soil types. The touch and step voltage values are within safe limits and do not harm humans, namely in swampy soil where the actual touch voltage value is smaller than the permitted touch voltage value. For the actual touch voltage on rocky soil and wet soil, the actual touch voltage value is greater than the actual touch voltage value, this is within the unsafe limit and can be dangerous to humans. The actual step stress value also results in the actual step stress value being smaller than the permitted step stress value, this is included in safe conditions, and for rocky and wet soil types the actual step stress value is greater than the permitted step stress value, this is included in the condition unsafe and can harm humans.
Temperature Control for Seaweed Dryer Based on PID krisna mukti
Emitor: Jurnal Teknik Elektro Vol 24, No 2: July 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i2.4318

Abstract

Seaweed is a commodity that has great potential in terms of establishing small or medium scale community businesses which are usually referred to as SMEs. The first thing you need to know about cultivating seaweed is the drying process, which aims to reduce the water content of the seaweed. When drying seaweed, people still use the traditional method, namely drying it in the sun, which takes 2 to 3 days. During the rainy season, farmers have to take 3 to 5 days for good results. Apart from that, the work is still manual or traditional, namely drying seaweed which takes quite a long time. If the weather when harvesting seaweed is rainy season, it will cause losses to seaweed farmers. As an alternative, a PID-based seaweed temperature and humidity control device has been developed using a light bulb heater as a substitute for sunlight for the process of drying the seaweed. The DS18B20 sensor is used to measure temperature, which is then displayed on the LCD. The Arduino Uno microcontroller is used to control the seaweed drying tool. This seaweed dryer can speed up drying by utilizing the Arduino system to reduce humidity so that drying time is faster. The results obtained with this simple seaweed dryer can speed up the drying process to 1.5 to a maximum of 2 days and the quality of the dried seaweed is better because it is protected from surrounding dust and dirt. The result of this research is a seaweed dryer that can help farmers dry the results of their seaweed cultivation in any weather conditions with the hope of better results.
Sistem Pengontrol Suhu CNC Laser Cutting 40W dengan Modul TEC1-12706 Abidin Rohmatulloh; Muhammad Kusban
Emitor: Jurnal Teknik Elektro Vol 24, No 1: Maret 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i1.4365

Abstract

Pengontrolan suhu pada tabung laser CO2 sangat penting untuk menjaga kinerja tabung laser. Tabung laser sendiri menghasilkan energi berupa cahaya dan panas. Energi panas ini jika tidak dikendalikan akan berpotensi merusak tabung laser. Adanya sistem pengontrol suhu menggunakan modul TEC1-12706 sangat bermanfaat untuk menjaga kinerja laser. Modul ini termasuk dalam thermoelectric yang mampu merubah energi listrik menjadi energi panas atau dingin dan juga sebaliknya. Penggunaan modul TECI-12706 termasuk ramah lingkungan karena tidak memakai Freon sebagai bahan utamanya. Proses yang dilakukan yaitu mensirkulasikan air dari tabung menuju peltier untuk didinginkan dan dibawa lagi menuju tabung. Proses ini menggunakan dua sensor yaitu sensor suhu dan sensor waterflow. Kriteria yang harus dipenuhi yaitu suhu tidak boleh kurang dari 25 derajat celcius atau melebihi 35 derajat celcius. Selain itu, volume air yang mengalir juga tidak boleh kurang dari 20 liter per menit. Hasil percobaan sistem pengontrol suhu menggunakan peltier TEC1-12706 mampu menurunkan suhu saat laser sedang running dengan cara mendinginkan air sirkulasi pada tabung laser.
VSAT Pointing Parameter Calculation Programming with Trigonometry Principles Using NEO6M GPS Module as Coordinate Detection Using C++ Programming Language Hasanah, Uswatun; Darma Setiawan, Antonius; Jaenul, Ariep
Emitor: Jurnal Teknik Elektro Vol 24, No 3: November 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i3.4415

Abstract

Very Small Aperture Terminal or VSAT is a type of telecommunications technology that uses satellites as a transmission medium. In the VSAT installation process there is a process called pointing, which is the process of directing the VSAT vertically and horizontally in the direction of the target satellite. This is very important to do to get good signal quality, so that the service output from the VSAT is good. The position of the VSAT device on earth, while the satellite is in outer space, creates complexity in the pointing process. The parameters to pay attention to when pointing are the azimuth value, namely the direction formed horizontally between the VSAT device and the point 0 degrees north of the earth, as well as the elevation value, namely the angle formed vertically between the VSAT device and the satellite towards the 0 degree point in the horizon plane. To obtain the azimuth and elevation parameters, previous scientists had written them in a mathematical formula with complex trigonometry elements. By using quantitative methods, this journal summarizes the programming of these formulas using the C++ language. This is useful in the future to determine the suitability of calculation results and can be developed further by direct integration into VSAT devices. This research also uses the NEO6M GPS module which can provide coordinate information because it is needed in calculating the formulation. The results of this research are that C++ can be used to program complex trigonometric mathematical calculations and the accuracy of the programmed parameters can be adjusted according to the type of data used. In conclusion, the C++ language can be used to carry out VSAT pointing parameter calculation programs in collaboration with GPS sensor readings with appropriate results.
Perancangan dan Implementasi Sistem Pencuci dan Sterilisasi Tangan Berbasis Arduino Uno untuk Pencegahan Penularan COVID-19 Muhammad Akbar Raihan; Muhammad Kusban
Emitor: Jurnal Teknik Elektro Vol 24, No 1: Maret 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i1.4783

Abstract

Penyebaran COVID-19 dapat dicegah melalui tindakan pencegahan seperti mencuci tangan dan sterilisasi yang efektif. Maka penelitian ini memiliki tujuan dalam merancang dan membangun sistem otomatis untuk mencuci serta mensterilkan tangan berbasis Arduino uno sebagai upaya untuk mengurangi resiko penyebaran COVID-19. Sistem ini menggunakan sensor inframerah untuk mendeteksi hadirnya tangan dan memulai proses pencucian tangan secara otomatis, dimulai dari pemberian air terhadap tangan, kemudian mencemprotkan cairan sabun pada tangan yang sudah terdeteksi sensor yang berada di tempat sabun, dilanjutkan kembali dengan pemberian air untuk membilas sabun dan diakhiri dengan pengeringan tangan dengan blower udara dan sinar UV yang terpisah dari keran air dan tempat sabun. Pengujian dilakukan dengan mengukur waktu yang dibutuhkan untuk mencuci dan mensterilkan tangan, serta tingkat keberhasilan keberhasilan dalam mencapai standar sanitasi yang diharapkan. Hasil penelitian menunjukkan bahwa sistem ini efektif dalam mencuci dan mensterilkan tangan secara otomatis dengan waktu yang relatif cepat, serta dapat membantu mengurangi resiko penyebaran COVID-19 pada tempat umum seperti sekolah, kantor, dan tempat lainnya. Sensor terbaca mulai dari jarak 7cm sampai dengan jarak 1cm, dan debit air mencapai 1120 mL dalam 5 detik. Sabun dapat keluar jika aktif lebih dari 2 detik, dan akurasi sensor suhu mencapai 0,05%.
Multifunctional Digital Protection Relay for Voltage and Current Disturbances in Power Networks Riza, Andrian; Suhariningsih; Okky Anggriawan, Dimas; Sunaryo, Epyk
Emitor: Jurnal Teknik Elektro Vol 24, No 3: November 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v24i3.5313

Abstract

The protection system is an essential part of the electrical power system, designed to minimize disturbances quickly, accurately, and precisely. Excessive electricity use can lead to frequent voltage and current fluctuations, resulting in short circuits, significant current spikes, and equipment damage. In addition to voltage and current variations, some electrical equipment is highly sensitive to frequency changes. Therefore, a device is needed to provide protection, prevent damage to electrical equipment, and ensure reliability. This research focuses on developing a protection relay using digital technology to continuously monitor and analyze voltage, current, and frequency parameters. When a fault or an out-of-range parameter is detected, the relay activates to protect the electrical system. For current protection, an experiment with a standard inverse setting at four different points was conducted, achieving an average reliability of 7.5%. For the very inverse setting with four different points, the average reliability was 5.79%. Voltage testing involved setting the overvoltage to the standard value of 231 volts and using various time delay types, resulting in an average reliability of 6%. This device is expected to protect electrical equipment that is highly sensitive to current, frequency, and voltage fluctuations.

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