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All Journal Transmisi: Jurnal Ilmiah Teknik Elektro GEMA TEKNOLOGI Jurnal Sistem Komputer Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Pengabdian Vokasi Journal of Vocational Studies on Applied Research GOTAVA

Arkhan Subari

STr. Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro

Author-ID : 387030

Agriculture, Biological Sciences & Forestry Computer Science & IT Economics, Econometrics & Finance Education Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Public Health Social Sciences

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RANCANG BANGUN DAN MONITORING PENYEARAH DAN ATS (AUTO TRANSFER SWITCH) PADA SISTEM MONITORING SUMBER DC GARDU INDUK BERBASIS ARDUINO MEGA 2560 Wirawan, Herdoyo; Subari, Arkhan
Gema Teknologi Vol 19, No 2 (2017): October 2016 - April 2017
Publisher : Vocational School Diponegoro University

Herdoyo Wirawan, Arkhan Subari, in this paper explain that the DC source at a PLN substation has a very important role in the smooth operation of the substation itself in a protection and serving the electricity needs of customers. This DC source serves to drive protective equipment, emergency lighting, and others.When the DC source on the receptor is interrupted, the dc source used is a DC source that comes from the battery. When certain conditions cannot guarantee whether the battery capacity is capable of supporting the load borne by the battery, it must always be monitored with a voltage sensor. In order for the protective equipment to continue to work, when the rectifier from the PLN power supply is cut off, a voltage source from 12VDC batteries is used. Switching the voltage source between the rectifier and the battery is done automatically by using the ATS (Automatic Transfer Switch) circuit. When the DC source from the PLN electricity supply will return it will be detected by an optocoupler sensor which later ATS will automatically switch the voltage source again.

RANCANG BANGUN SISTEM MONITORING KEAMANAN RUMAH BERBASIS WEB MENGGUNAKAN RASPBERRY PI B+ SEBAGAI SERVER DAN MEDIA KONTROL Syabibi, Muhammad Khoiru; Subari, Arkhan
Gema Teknologi Vol 19, No 1 (2016): April 2016 - October 2016
Publisher : Vocational School Diponegoro University

Muhammad Khoiru Syabibi, Arkhan Subari Â in this paper explain that Along with the progress of era, the development of advanced technology also impacts on the development of security systems. Sophisticated security systems that digitally integrated has been growing, one of them is a web-based security system.Â This web-based home security monitoring system uses a raspberry pi b + that serves as a server and media controller, then for the web programming, it uses HTML, CSS and Javascript. This web-based home security monitoring system home uses a webcam (web camera) that functions like CCTV which can be monitored via a web browser, magnetic switch as security detector, keypad as access control to turn off security monitoring system for 10 seconds, and the buzzer and LED as security indicators.Â When someone enter the house, he/she must press the keypad. If keypad input is correct according to the passcode then the LED will turn off, indicate that home security monitoring system off for 10 seconds. If he/she enter the house without pressing the keypad according to the passcode then when the door opens, a switch magnetic will active, then buzzer will sound and the indicator on the web will change, indicate that he/she is a person who will do the crime.Keyword : raspberry pi b+, webcam, magnetic switch, keypad, buzzer and LED.Â ReferencesAndre. 2014. Sejarah PHP dan Perkembangan Versi PHP. http://www.duniailkom.com/sejarah-php-dan-perkembangan-versi-php.Apache Software Foundation. About the Apache HTTP Server Project. http://httpd.apache.org/ABOUT_APACHE.html.Arfa. 2014. Akses Kontrol Kendaraan Bermotor Roda Empat Menggunakan Password dan Sensor. Skripsi. Jakarta: STMIK Raharja.Aziz, Abdul. 2012. Pengertian, Fungsi, Serta Cara Kerja Web Server. http://www.dedeerik.com/pengertian-fungsi-serta-cara-kerja-web-server.Baharudin, M. 2011. Pengertian Website. http://www.naevaweb.com/pengertian-website/arsip.html.Cox, Tim. 2014. Raspberry Pi Cookbook. Birmingham: Packt Publishing.Embedded Linux Wiki. Raspberry Pi, Low-level Peripherals. http://elinux.org/RPi_Low- level_peripherals.Embededdlinux. Raspberry Mode B-Block diagram. Diunduh http://embeddelinux01.com.Faizal. 2011. Prinsip Kerja Piezoelectric. http://www.insinyoer.com/prinsip-kerja-piezoelectric.Friedl, Stave. 2015. Secure Linux/Unix Access With Putty and Open SSH. http://unixwiz.net/techtips/putty-openssh.html/2015.Gudang Linux. 2011. Python. http://gudanglinux.com/glossary/python.Gurevich, Vladimir. 2011. Electric Relays: Principles and Applications. London: CRC Press.Harian Android. 2014. Pengertian dan Fungsi SD Card. http://www.harianandroid.com/2014/04/pengertian-dan-fungsi-sd-card.html.Heranudin. 2011. Rancang Bangun Sistem Keamanan Ruangan Menggunakan Radio Frequency. Skripsi. Depok: FT UI.Iswan, Agusta. 2012. Sistem Proteksi Brankas Berpassword Menggunakan Magnetic Doorlock sebagai Penggerak Doorstrike Berbasis Mikrokontroller. Tugas Akhir D3 Teknik Elektro. Semarang: FT UNNES.Kho, Dickson. 2012. Dioda dan Fungsi Dioda. http://teknikelektronika.com/-dioda-fungsi-dioda.Kho, Dickson. 2012. Pengertian LED (Light Emitting Diode) dan Cara Kerjanya. http://teknikelektronika.com/pengertian-led-light-emitting-diode-cara-kerja.Kho, Dickson. Pengertian Resistor dan Jenis Resistor. http://teknikelektronika.com/pengertian-resistor-jenis-jenis-resistor.Komponen Elektronika. 2011. Rangkaian Buzzer. http://komponenelektronika.com/rangkaian- buzzer.html.MS-1 Magnetic Door Switch datasheet. http://www.braude.ac.il/files/departments/electrical_electronic_engineering/labs/data_pages/p3.pdfNasih, Muhammad Usman. 2013. Alat Pengaman Kendaraan Bermotor Menggunakan Password dan SMS. Tugas Akhir. Yogyakarta: STMIK El Rahma.Ã–zcan, Yakut. 2014. Piezoelektrik.Paul Malvino, Albert. 2010. Prinsip-Prinsip Elektronika. Jakarta: Erlangga.Pemrograman Komputer. 2012. Petunjuk Praktikum Pemrograman Komputer. Semarang: D3 Teknik Elektro UNDIP.Prayitno, Indra. 2010. Kupas Tuntas Malwar. Jakarta: Elex Media Komputindo.Raspberry Pi Fondation. GPIO Raspberry Pi Model A dan B. https://www.raspberrypi.org/documentation/usage/gpio/2009Raspberry Pi Fondation. Setting Up And Apache Web Server On A Raspberry Pi. https://www.raspberrypi.org/documentation/remote-access/web-server/apache.md.Raspberrry Pi Fondation. SSH Using Windows. http://raspberrypi.org/documentation/remote-access/ssh/windows.md/2014Richardson, Matt dan Shawn Wallace. 2015. Make: Getting Started with Raspberry Pi. Sebastopol: Maker Media.Robinson, Andrew dan Mike Cook. 2014. Raspberry Pi Projects. Chichester: John Wiley & Sons Ltd.Rohiman, Ao. 2011. Pengertian dan cara kerja router.http://www.catatanteknisi.com/2011/05/pengertian-cara-kerja-router.html.Sidik, Betha. 2011. Javascript. Jakarta: Informatika.Wahyu. Pengertian Webcam dan Fungsinya. http://wahyu.blog.fisip.uns.ac.id/2011/12/06/pengertian-web-cam-dan-fungsinya.Wikipedia. Secure Digital. https://en.wikipedia.org/wiki/Secure_Digital#Micro.Â

REALISASI PENGENDALI ON-OFF HISTERISIS DENGAN OPERATIONAL AMPLIFIER (OP-AMP) Tadeus, Dista Yoel; Subari, Arkhan; Manan, Saiful
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

The realization of the On-Off control system can be built using the comparator principle. The principle has a weakness that is the possibility of chattering due to 'thin' limit of comparator switching. Low immunity to noise increases chances of chattering, if not anticipated it will cause 'fatigue' on actuator thus reducing componentâ€™s lifetime. Hysteresis has features to suppress chattering. This article describes how to realize the hysteresis On-Off controller using Operational Amplifier (Op-Amp) which is simple and cheap discrete electronics component, by modifying the Op-Amp comparator circuit so that it has the hysteresis band with minimum and maximum limit variable so that the reference point of the comparator can be shifted.

SIMULASI PELIMPAHAN BEBAN SISTEM PMT KOPEL TO KOPEL PADA SAAT PEMELIHARAAN TRAFO BERBASIS ARDUINO MEGA 2560 MENGGUNAKAN VT SCADA 11.2 Samputro, Muhammad Rizki; Subari, Arkhan
Gema Teknologi Vol 20, No 3 (2019): April 2019 - October 2019
Publisher : Vocational School Diponegoro University

Mochammad Rizki Samputro, Arkhan Subari in this paper explains that the need for electricity in everyday life demands PT. PLN to always maintain the distribution of electrical energy to customers. Therefore, it is necessary to use a strategy to prevent blackouts if the transformer is being maintained, that is by maneuvering the load through the network or by using a 20 KV coupling system. The 20 KV Coupling System consists of PMT Kopel Transformer 1 and PMT Kopel Transformer 2 or often called PMT Kopel to Kopel. In this research, a Kopel to Kopel PMT simulation tool is used to transfer transformer loads during maintenance using a LY2N DPDT 12 V relay, ZMCT103C current transformer sensor, voltage sensor, tap changer and use Arduino Mega 2560 as a delivery choice change. After the experiment, the total current size of transformer 1 and transformer 2 exceeds the capacity of transformer which is 4.29 A and the voltage difference is 0.71 V (5.9 %). Therefore it is necessary to adjust the current and voltage regulation so that it becomes 2.82 A and 0.06 V (0.5 %). After that the transfer of load Transformer 2 to Transformer 1 using PMT Kopel to Kopel can be done. The load transfer is done by entering the PMT Kopel 1 and PMT Kopel 2 simultaneously and the Incoming 2 PMT is released. For the normalization, PMT Incoming 2 is entered and PMT Kopel 1 and Kopel 2 are released simultaneously.

PEMBUATAN CREAM DETERGENT UNTUK MENINGKATKAN KETRAMPILAN IBU-IBU PKK Kusumayanti, Heny; Budiyono, Budiyono; Dwimawanti, Ida Hayu; Yesiana, Reny; Purwanto, Agus; Subari, Arkhan
Gema Teknologi Vol 19, No 4 (2018): October 2017 - April 2018
Publisher : Vocational School Diponegoro University

Cream detergent is often used in everyday life, serves to wash and clean the dirt (fat). In order to commemorate the day of kartini in 2018, held a training on making cream detergent in Kp. Krapyak RT 07 RW 11 Bintoro Demak. The pH cream detergent generated from this training is 11, this is in accordance with SNI 0062: 2016, where the pH max cream detergent is 11. The purpose of this devotion provides the transfer of science and technology appropriately to the mother of PKK and also to provide skills and entrepreneurship to PKK mothers.

RANCANG BANGUN SISTEM MONITORING KETINGGIAN AIR DAN KELEMBABAN TANAH PADA PENYIRAM TANAMAN OTOMATIS DENGAN HMI (HUMAN MACHINE INTERFACE) BERBASIS RASPBERRY PI MENGGUNAKAN SOFTWARE NODE-RED Wiguna, Esa Hayyu; Subari, Arkhan
Gema Teknologi Vol 19, No 3 (2017): April 2017 - October 2017
Publisher : Vocational School Diponegoro University

Esa Hayyu Wiguna, Arkhan Subari, in this paper explain that the monitoring system is a system used to monitor and control work processes in a plant design. This system is widely used and applied in the industrial world to find out the performance of a plant. To do the monitoring system, a lot of software can be used, which is then called the HMI (Human Machine Interface). The monitoring system with an interface in the form of HMI can be presented in various forms, such as buttons, or can also be displayed in the visualization of the plant while working. This monitoring system through an HMI interface uses supporting hardware in the form of a Raspberry Pi as a device to process the data that will be displayed on the display screen, while displaying its visualization uses an LCD touch screen. This LCD touch screen is connected to the Raspberry Pi via the LCD driver. The graphic form that will be displayed on the LCD touch screen is designed using Node-RED software. The visualization that will be displayed on the Touch Screen LCD will be adjusted to the working system of automatic plant sprinklers. This monitoring system using an HMI interface can display the plant's working system through indicators of water level and soil moisture. To test tube 2 water level measured through ultrasonic sensors through HMI has an error ratio of 1.01%, while for soil moisture measured through soil moisture sensors has an error ratio of 1.51%.

SIMULASI PENENTUAN LOKASI GANGGUAN SATU FASA PADA JARINGAN TEGANGAN MENENGAH 20 KV BERBASIS ARDUINO MEGA 2560 DILENGKAPI DENGAN MONITORING MELALUI VTSCADA Ashifa, Danu Nur; Subari, Arkhan
Gema Teknologi Vol 20, No 2 (2019): October 2018 - April 2019
Publisher : Vocational School Diponegoro University

Danu Nur Ashifa, Arkhan Subari in this paper explain that in a distribution network of 20 KV, short circuit interference often occurs. Short circuit interference will produce a fault current that is felt by protection equipment. Each fault current will differ depending on the distance of the interference. Determining the distance of interference can not be displayed in SCADA, SCADA will only display the amount of interference and which equipment works. Determination of distance is carried out after analysis by the officer. Based on this matter the compiler makes a simulation tool where the tool can monitor the location of the disturbance from the nearest protective equipment that feels a single phase short circuit interference. The simulation tool consists of Arduino Mega 2560 which functions as a control center. The input used is a potentiometer as a simulator of the impedance magnitude that occurs during a single phase short circuit where the potentiometer will provide input in the form of a signal. And Omron LY2N relay which functions as protection equipment. After the experiment, the results obtained are that the tool can determine the location of interference from the nearest protection equipment based on changes in the bits read by Arduino. The larger the bits read by Arduino, the more distant the interference occurs from the protection equipment. 125 bits will produce an Arduino impedance calculation of 2.6 ohms so that the fault location is 0 km from PMT while 1023 bits will produce an impedance calculation of 21.30 ohms so that the fault location is 4.5 km from SSO.

IMPLEMENTASI IDENTIFIKASI SISTEM METODE BLACK BOX PADA MOTOR DC MENGGUNAKAN CORRELATION ANALYSIS DAN MODEL ARX Mangkusasmito, Fakhruddin; Tadeus, Dista Yoel; Subari, Arkhan
Gema Teknologi Vol 20, No 4 (2020): October 2019 - April 2020
Publisher : Vocational School Diponegoro University

The identification system is a procedure to obtain a model of a system, then of the model will be validated to see the accuracy of the model is obtained, compared to the input-output results obtained from the experiments. In the identification system itself known two methods, the method of "non-parametric" and "parametric". On the other hand, DC motor is a type of motor that uses direct electric current to produce rotational mechanical energy and is widely used in various applications. In this study, input and output data acquisition will be performed on the Feedback brand DC motor, and the data will be processed so that the system model is obtained by the black box method. The data will then be processed with the help of MATLAB software. The input signal used in this experiment is Pseudorandom binary sequence (PRBS), which is used because it has a wide frequency range. The signal is generated by an arduino uno microcontroller. From the test results it was found that the validation of the non parametric system model with the correlation analysis method has a fitness value of = 83.19%, while the validation of the parametric system model with the least square ARX method has a fitness value of = 80.59%.

RANCANG BANGUN SISTEM RACK IN DAN RACK OUT PMT OTOMATIS DI KUBIKEL 20 KV BERBASIS ARDUINO MEGA 2560 MENGGUNAKAN VTSCADA 11.2 Puteri, Ratna Azizah; Subari, Arkhan; Tadeus, Dista Yoel
Gema Teknologi Vol 20, No 4 (2020): October 2019 - April 2020
Publisher : Vocational School Diponegoro University

The 20 KV PMT (Circuit Breaker) is an important equipment for the reliability of electricity distribution. Therefore it must be maintained so that it is always in good condition with regular maintenance. Prior to maintenance, PMT is terminated from the bus bar, which is called the rack out process. After maintenance, the PMT is reconnected with the bus bar, which is called the rack in process. Usually, 20 KV PMT rack in and rack out process in maintenance or disturbance is still using the manual method. The 20 KV PMT can only be racked in and racked out in one way, by turning the lever. The lever will rotate the bolt as a PMT rail. In the manual method, there is no system for monitoring the condition of the bus bar whether it is has electric-voltage or not. There is also no remote control that can rack in and rack out. So officers must ensure the conditions of PMT and bus bars are safe manually, before maintenance is carried out. This is quite troublesome and dangerous for officers. From these problems, in this research Â designed a system that could ensure the condition of the PMT and the bus bar was safe before the rack in and rack out process was carried out and could monitor and control the system remotely using SCADA. Rack-in and rack-out automation system using VT SCADA, using Ethernet Shield that has been connected with Arduino Mega. Ethernet is connected to a mini PC. The microcontroller pins will be connected to the relays that will turn or stop the motor. The rack in and rack out commands from VT SCADA will determine the rotation of the motor so that the PMT moves. The current sensor reads the current flow and detects interference. Interference detection will automatically make PMT Rack out. System testing shows that the process of racking out in a state of maintenance or disturbance can be carried out automatically controlled by VT SCADA. Current sensor works to detect the current flowing, so that it can detect PMT interference and perform automatic rack out. The rack-in process is also capable of being remotely controlled with VT SCADA. This makes it easier for officers to also become additional reliability of PMT in the 20 KV cubicle.

PEMANFAATAN METODE WAVS (WEB APPLICATION SECURITY SCANNERS) MENGGUNAKAN BURP SUITE TOOLS DALAM AUDIT TEKNIS KEAMANAN SISTEM INFORMASI SURAT TUGAS SEKOLAH VOKASI UNDIP Arkhan Subari; Saiful Manan; Eko Ariyanto; Adnan Fauzi
Gema Teknologi Vol 21, No 4 (2022): October 2021 - April 2022
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v21i4.46828

An official travel assignment letter is a type of assignment letter needed by an employee in carrying out work assignments. In many ways, the assignment letter information system is built based on web-programming. In web-programming there are two methods to send data from client to server. The two methods are the POST method and the GET method. Information security is an important aspect that needs to be considered in design a information system. There are many attacker spying data on information system daily. Usually the attacker uses the loopholes in the data transmission method to attack the system. There are many techniques used to attack information systems likes WAVs (Web Application Security Scanners). WAVs is a program that is used to find security holes in web-based information systems using several methods, such as XSS, SQL Injection, Intercept and Bruteforce. One program that can be used is Burp Suite. Burp Suite is often used by security auditors, researchers, and testers for analysis of different systems. Burp's core functionality is to intercept and display HTTP requests in a structured manner. The Vocational School of Diponegoro University has developed an information system that is used to manage this assignment letter. The information system is design using a web-based application. However, the system has never been technically audited on its security level. Therefore, it is necessary to audit the information system security techniques so that the level of information system security can be ascertained and corrective steps can be taken if there are security holes found. This study is intended to conduct a technical audit of the security of the UNDIP Vocational School assignment letter information system. The audit was conducted using the WAVs (Web Application Security Scanners) method with the Burp Suite application. The results of the brutefoce test using Burpsuite showed that there was no suitable password. However, the fact that an attacker can attack 30,0006 times is a weakness that needs to be fixed.

Co-Authors AGUS PURWANTO Alim, Ilmam Fauzi Hashbil Ashifa, Danu Nur Azis Nurrochma Wardana, Azis Nurrochma Budiyono Budiyono Dinda Hapsari Kusumastuti, Dinda Hapsari Dista Yoel Tadeus Eko Ariyanto Fakhruddin Mangkusasmito Fakhrudin Mangkusasmito Fauzi, Adnan Fauzi, Adnan Galuh Wahyu Wohingati, Galuh Wahyu Hati, Redi Permata Heny Kusumayanti Heru Winarno Heru Winarno Ida Hayu Dwimawanti Indradewa, Rhian Irene Ega Novena Putri, Irene Ega Lutfiyanto, Agung Hanifan Manan, Saiful Muhammad Ishaq Islahuddin, Muhammad Ishaq Puteri, Ratna Azizah Ratih Kusuma Dewi Reny Yesiana Roy Wijayanto Saiful Manan Saiful Manan Samputro, Muhammad Rizki Setiyani, Umi Stacia Reviany Mege Syabibi, Muhammad Khoiru Wiguna, Esa Hayyu Windriya, Anafil Wirawan, Herdoyo Yuniarto Yuniarto, Yuniarto

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