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Elektrika

elektrika
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Published by Universitas Semarang

ISSN : 20850565 EISSN : - DOI : -

Core Subject : Engineering,

Electrical & Electronics Engineering

Jurnal eLEKTRIKA diterbitkan oleh Jurusan Teknik Elektro, Fakultas Teknik, Universitas Semarang sejak tahun 2009, dan terakreditasi oleh Kementerian Ristekdikti pada tanggal 29 Januari 2009, dengan No. ISSN 2085-0565. Jurnal eLEKTRIKA adalah jurnal open akses dengan pelibatan mitra bebestari (peer-reviewed yang terbit dua kali dalam setahun, Maret dan Oktober.

Arjuna Subject : -

Articles 90 Documents

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MODEL SISTEM INFORMASI MONITORING PERKULIAHAN FAKULTAS TEKNIK UNIVERSITAS SEMARANG BERBASIS WEB Derman Derman; Harmini Harmini
Elektrika Vol 10, No 2 (2018): Oktober 2018
Publisher : Universitas Semarang

The development of Information Technology is increasingly demanding that Higher Education to provide information quickly to meet the needs of Information and Monitoring Course for Lecturers, Students and Admin staff. This study aims to design a Model Information System and Monitoring Course at the Faculty of Engineering, University of Semarang Web-based. Coverage includes lecture planning, lecturing, evaluation of lecturing, control of lecturing and improvement of lecture planning. This research produces an application of Information System and Monitoring model of lecturing which aims to facilitate and accelerate the preparation of time, room and course schedule and ease in monitoring the attendance status of lecturers in class either to students or other parties in real time without having to come to campus check board information . The contribution of this research results will greatly affect the application of science and technology for higher education institutions and to realize the development of Faculty of Engineering Semarang University as a leading Faculty in 2023. The method used is dynamic priorities method which prioritizes the process that has the highest priority and is able to respond to changes in the system environment operate. Modeling the system using XAMPP package in which integrated MySQL module for database purposes, PHP for management of information systems, and Apache for simulation purposes. The results showed the implementation of the application of Information Systems Monitoring System Lectures Faculty of Engineering, University of Semarang goes well.

SISTEM MONITORING PENGENDALI DAN PENGHITUNG WAKTU PADA DRAG RACE BERBASIS MIKROKONTROLER AT MEGA 8535 Vendi Bangun Marhendra; Sri Heranurweni
Elektrika Vol 9, No 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1095

In a drag race, which is often held by race organizers. The process of determining the jump start and determining who crosses the first finish line still relies on human monitoring. Manually recording (stopwatch) is not enough because there are many inhibiting factors, including: operator, start theft by drivers, recording results, damage to the stopwatch and others. The drag race is often held during the day. The hot weather will cause someone to get tired quickly, in this case it is aimed at the person who is the operator who monitors the theft of the start and the operator at the finish line because the person is in the middle of a very hot track. Based on the reasons mentioned above, it is necessary to have a controller and timer system on the ATMega8535 microcontrollerbased drag race. Making this tool will facilitate the work of humans in obtaining information in the racing arena that does not allow humans to do it manually, so that accurate data is obtained.Keywords: Atmega 8535 microcontroller, jump start, stopwatch

RANCANG BANGUN APLIKASI MONITORING PERAWATAN DAN PEMELIHARAAN MESIN CENTRAL UTILITY PT. PHAPROS, Tbk DI MOBILE SMARTPHONE BERBASIS ANDROID 4.0 MENGGUNAKAN SOFTWARE ECLIPSE KEPLER Edi Sudarmono
Elektrika Vol 9, No 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1096

Pekerjaan perawatan dan pemeliharaan mesin merupakan salah satu prioritas utama dalam menjamin kehandalan operasional mesin yang harus terkontrol dan termonitor. Monitoring perawatan dan pemeliharaan mesin central utility di PT. Phapros Tbk, dilakukan secara manual. Pelaksanaan pekerjaan seringkali tidak sesuai dengan jadwal yang telah ditentukan. Administrasi pekerjaan belum berjalan dengan baik.Salah satu sistem yang dapat digunakan untuk membantu pekerjaan perawatan dan pemeliharaan mesin central utility di PT. Phapros, Tbk adalah aplikasi monitoring smartphone berbasis android. Aplikasi ini menampilkan informasi spesifikasi dan fungsi tentang mesin - mesin central utility, jadwal pekerjaan, informasi personil teknisi dilengkapi dengan speedcall untuk menghubungi teknisi secara langsung, catatan pekerjaan serta record data maintenance. Pembuatan aplikasi monitoring perawatan dan pemeliharaan mesin central utility di PT. Phapros Tbkini menggunakan software berbasis Java dan XML. Pengembangan aplikasi Android menggunakan IDE (Integrated Development Environment) Eclipse Kepler sebagai emulatornya. Catatan pekerjaan dan record data maintenace tersimpan dalam memori internal dan dapat ditampilkan dalam Personal Computer.Administrasi hasil pekerjaan dapat terdata dengan baik. Serta dapat memberikan informasi berkaitan dengan mesin, teknisi, dan catatan pekerjaan perawatan dan pemeliharaan mesin central utility di PT. Phapros, Tbk. Kata Kunci: Android, Aplikasi, Perawatan dan Pemeliharaan Mesin

RANCANG BANGUN SMART HOME AUTOMATIC CONTROL dengan KOMUNIKASI MELALUI BLUETOOTH HC-05 BERBASIS MIKROKONTROLER ARDUINO dan ANDROID Yohan Erwinnanto; Andi Kurniawan N; Sri Heranurweni
Elektrika Vol 9, No 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1092

Design of Smart Home Automatic Control with Communications Via Bluetooth HC-05-Based Microcontroller Arduino and Android, will provide all the comfort, safety, security and energy savings, which takes place automatically and programmed via microcontroller, the house or building. Design of Smart Home Automatic with Control Communications Via Bluetooth HC-05-Based Microcontroller Arduino and Android is intended for automatic control processes.The system consists of seven sensors, keypad password for security doors, HC-05 Bluetooth GSM alarm application and device control applications aktuaktor, and aktuaktor buzzer, dc motors, lights, fans and fan dc exhausting. Among these sensors is a PIR sensor to detect theft, sensor MQ6 to detect leakage of LPG gas and smoke from fires, sensor HC-SR04 ultrasonic for automatic garage doors, fire sensors to detect a fire, the sensor LM35 to detect the temperature of the room, when the room temperature is hot the fan will be on automatically, when the cold room temperature will shut off the fan and LDR sensor to detect the intensity of light during the day which turn the lights off automatically and vice versa, thus saving energy. Homeowners can also control lights and monitoring sensors with android phones that are connected with communication via Bluetooth HC-05 microcontroller arduino, and can receive GSM alarm application sensors such as calling and sms.Test results are used UART communication data transmission between the microcontroller serial monitor monitor has an error of 0 % . HC - 05 Bluetooth can accept orders at the farthest distance of 11 meters . The fire sensor can work well when the fire was 1-10 cm . Sensor HC - SR04 is already working with an error rate of 0.3 %, so the accuracy of this tool by 100 % - 0.3 % = 99.7 % .Keywords : Security Door , Bluetooth HC - 05 , Microcontroller Arduino and Android , Application Control and Application GSM alarm.

RANCANG BANGUN SYRINGE PUMP Hafidz Falista M
Elektrika Vol 9, No 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1094

A syringe pump is a tool for inserting high-dose drug fluids given to patients. The accuracy and accuracy of the amount of fluid given to this device are quite high. The need for this tool in hospitals is very large, but in terms of the economy, the price of the equipment is still very expensive so it is not affordable for small hospitals. The purpose of making a syringe pump is to be able to meet the needs of the syringe pump in small hospitals so that it can save on budget expenses. Therefore a syringe pump is designed, designed using the Arduino Nano as a control system, display flow speed with 16x2 LCD, stepper motor as a syringe booster according to the regulated flow speed, and buzzer as an alarm when a blockage occurs and the syringe placement is incorrect. Flowrate parameters at a speed of 10 ml / hour, 20 ml / hour, 30 ml / hour, 40 ml / hour and 50 ml / hour.Keywords: Syringe Pump, flowrate, stepper motor, Arduino Nano

SIMULASI PH AIR UNTUK AIR BOILER DAN AIR CHILLER PADA MESIN PRODUKSI REFRIGERATOR DENGAN MENGGUNAKAN LOGIKA FUZZY Andhika Irawan; Sri Heranurweni; Titik Nurhayati
Elektrika Vol 11, No 1 (2019): April 2019
Publisher : Universitas Semarang

The need for water is very important for the production process, the water quality must also be considered the pH value so that the water is suitable for use in boilers or chillers. Seeing from these needs a simulation was made on matlab R2017a using a fuzzy toolbox that can find out the water quality with fuzzy mamdani method. This fuzzy logic simulation can determine the standard value of boiler water pH (10.5-11.5) and the standard pH value of chiller water (6-8) in the production machine. The methods in fuzzy logic used are mamdani and centroid methods as deffuzification with R2017a matlab simulation tool. The fuzzy inference system used is the mamdani method. This study made a simulation of mamdani method that can determine the quality of the PH water produced by using fuzzy logic. Chiller water pH can be used if iron ion values (0-2 ppm), silica ions (50-150 ppm), Total Dissolved Solid (TDS) (500-1000 ppm), total Hardness (100-200 ppm), M-alkalinity (500-750 ppm) from the standard value, the pH of the chiller water can be proven to reach a water pH value of 6-8. Boiler water pH can be used if iron ion values (0-2 ppm), silica ions (100-150 ppm), Total Dissolved Solid (TDS) (2000-3500 ppm), total Hardness (0-3 ppm), M-alkalinity (700-800 ppm) from the standard value, the pH of boiler water can be proven to reach a water pH value of 10.5-11.5.Keywords: fuzzy logic, Mamdani method, pH of boiler water

PREDIKSI BEBAN ENERGI LISTRIK APJ KOTA SEMARANG MENGGUNAKAN METODE RADIAL BASIS FUNCTION (RBF) Mukti Dwi Cahyo; Sri Heranurweni; Harmini Harmini
Elektrika Vol 11, No 2 (2019): Oktober 2019
Publisher : Universitas Semarang

Electric power is one of the main needs of society today, ranging from household consumers to industry. The demand for electricity increases every year. So as to achieve adjustments between power generation and power demand, the electricity provider (PLN) must know the load needs or electricity demand for some time to come. There are many studies on the prediction of electricity loads in electricity, but they are not specific to each consumer sector. One of the predictions of this electrical load can be done using the Radial Basis Function Artificial Neural Network (ANN) method. This method uses training data learning from 2010 - 2017 as a reference data. Calculations with this method are based on empirical experience of electricity provider planning which is relatively difficult to do, especially in terms of corrections that need to be made to changes in load. This study specifically predicts the electricity load in the Semarang Rayon network service area in 2019-2024. The results of this Artificial Neural Network produce projected electricity demand needs in 2019-2024 with an average annual increase of 1.01% and peak load in 2019-2024. The highest peak load in 2024 and the dominating average is the household sector with an increase of 1% per year. The accuracy results of the Radial Basis Function model reached 95%.

DESAIN GENERATOR OZONE DENGAN TEKNOLOGI PLASMA DBD (Die-lectric Barrier Discharge) Ricky Aryadi; Supari Supari; Harmini Harmini
Elektrika Vol 11, No 1 (2019): April 2019
Publisher : Universitas Semarang

Industrial sterilization is a very important problem. Ozone is a powerful oxidizer that can function for sterilization and is environmentally friendly. Plasma DBD (Dielectric Barrier Discharge) is one of the effective technologies to obtain ozone. The ozone generator currently uses a lot of manual control operations. Manual control uses a mechanical system in the form of a potentiometer to calibrate the frequency and output of the ozone generator output, so that digitization and automation are needed to operate to replace human labor. The design of the digital ozone control generator is done using an AVR microcontroller. Programming used in this research is basic language (BASCOM), then uses a DAC (Digital to Analog Converter) system which is the output of a Microcontroller with a Weighted Binnary Resistor. The output of the microcontroller is frequency and 8 bit digital with a decimal parameter of 200. The result of automation is that the timer works for 2 hours. The greater frequency the ozone produced. At a frequency of 1500Hz the power produced is 308.58 watts with an ozone concentration of 59 ppm. Efficiency using a switching system> 90%. Keywords: Plasma, AVR Microcontroller, Ozone.

RANCANG BANGUN PROTOTYPE SMART HOME DENGAN KONSEP INTERNET OF THINGS (IOT) MENGGUNAKAN RASPBERRY PI BERBASIS WEB Bagus Eryawan; Ari Endang Jayati; Sri Heranurweni
Elektrika Vol 11, No 2 (2019): Oktober 2019
Publisher : Universitas Semarang

High economic growth makes the demand for comfortable and safe houses increase and the application of technology that is most clearly seen is technology with automatic systems. With this technology, the use of electricity in the house can be minimized and offer convenience in controlling the house. Sometimes homeowners forget to turn off the lights when they are outside the house so they have to go back and do checks that are very inefficient both in terms of time and financially such as the cost of gasoline to return to the house. Based on this, the Smart Home Prototype was created with the concept of the Internet of Things (IoT) using Raspberry Pi Web-Based, which is a system that can remotely control electronic home appliances using Raspberry Pi as a base system, which is connected to Web Applications through the internet network. The electronic equipment used in this study is in the form of 5 lamps, 1 stepper motor to control the garage, 1 servo motor to control the door lock, and 1 brushless motor that functions as a fan. Blocking and overall test results on Bedroom Lights, Living Room Lights, Kitchen Lights, Bathroom Lights, Porch Lights, Garages, Door Locks, and Fans, all work well. The testing of the distance between cities against the Prototype Smart Home was successfully carried out, where the Prototype Smart Home in the City of Demak was successfully controlled by the User who at the time of testing was in the City of Semarang, Kudus, Japan, Surabaya, and Jakarta.

Rancang Bangun Electronic Couter Dengan Control Display Ahmad Muhajirin Wibowo
Elektrika Vol 9, No 2 (2017): Oktober 2017
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v9i2.1093

Perkembangan dunia medis saat ini tingkat efisiensi waktu dan ketelitian sangat menentukan, salah satu alat penunjang di bidang peralatan kedokteran adalah electronic couter, yang digunakan pada saat tindakan khitan dan pemotongan/ cutting. Tujuan penggunaan alat ini adalah untuk mengurangi atau meminimalisir perdarahan, tanpa jahitan, dengan nilai estetika lebih baik, karena pembuluh darah yang terbuka di daerah luka langsung dapat ditutup. Sebelum ditemukannya alat ini, teknik pembedahan dilakukan hanya dengan menggunakan instrumen konvensional, yaitu berupa pisau bedah. Dampak penggunaan instrumen ini dapat mengakibatkan pendarahan pada saat dilakukan tindakan pembedahan. Berdasarkan latarbelakang tersebut penulis ingin membuat alat electronic couter yang mampu memudahkan dokter khitan dalam pekerjaannya. Dengan interactive Control Display, alat ini mampu menampilkan suhu panas pada filament prob logam yang akan digunakan untuk tindakan pemotongan jaringan kulit. KataKunci :Electronic Couter, Cutting, Control Display

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