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All Journal Jurnal SPEKTRUM Majalah Ilmiah Teknologi Elektro Jurnal EECCIS International Journal of Engineering and Emerging Technology Majalah Ilmiah Teknologi Elektro

Pratolo Rahardjo

Department Of Electrical Engineering, Faculty Of Engineering, Udayana University

Author-ID : 2816939

Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

Published : 62 Documents Claim Missing Document

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Penghapus Derau Adaptif dengan Algoritma NLMS Ukuran Langkah Adaptasi Tetap dan Berubah Panca Mudjirahardjo; Pratolo Rahardjo
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 1 No. 1 (2007)
Publisher : Fakultas Teknik, Universitas Brawijaya

Penghapus derau adaptif adalah penapis optimal yang dapat diterapkan bila masukan referensi tersedia. Keuntungan metode ini adalah kemampuan adaptasi dan distorsi keluaran yang rendah. Penggunaan ukuran langkah yang tepat memberikan kecepatan konvergensi yang tinggi. Penelitian ini memodifikasi ANC klasik sehingga memberikan kecepatan konvergensi yang lebih tinggi dan distorsi sinyal keluaran yang lebih rendah. Seratus iterasi pertama menerapkan ukuran langkah tetap kemudian berubah-ubah untuk iterasi berikutnya. Ukuran langkah modifikasi ini berdasar pada estimasi SNR. Simulasi komputer dengan derau putih, menunjukkan ANC usulan mempunyai distorsi 10 hingga 20 dB dibawah ANC klasik.

RANCANG BANGUN SPECTROSCOPY OPTIK PORTABEL BERBASIS ARDUINO MICRO I Gede Yogi Astawan; Yoga Divayana; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 6 No 2 (2019): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

This research is conducted to build portable spectroscopy optic with Android and desktop applications. Portable spectroscopy optic consists of Arduino Micro, Nextion Liquid Crystal Display (LCD), 2 pieces Light Emitting Diodes (LED), servo motor, diffraction grating (600 lines/mm), 2 pieces photodiodes, Bluetooth HC-05, and SD Card Reader Writer. Android and desktop applications realized by using Qt IDE. Spectroscopy testing is done using polymers with color red, green, and blue. The result of polymers sample testing shows that the spectrum with same wavelength range as the sample color will be passed, while other wavelengths will be absorbed. The device has been able to measure absorption of sample. On testing restore the test results to the SD card produces file with size about 2 kB. Device uses battery with capacity 3000 mAh and can be actively sustainable during 3 hours 31 minutes. Testing of communication Android and desktop applications with spectroscopy is done using bluetooth and Universal Serial Bus (USB) cable. The result of application testing are already able to send and receive data from spectroscopy.

RANCANG BANGUN MODUL PRAKTIKUM SISTEM EMBEDDED BERBASIS RASPBERRY PI (MODUL 2: PENERAPAN SISTEM SEDERHANA) I Putu Pawesi Siantika; Pratolo Rahardjo; I Gusti Agung Putu Raka Agung
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Embedded systems play a very important role in various fields so that several universities,especially Udayana University in the Electrical Engineering Study Program, Faculty ofEngineering have included embedded systems + lab courses. However, the availability ofsupporting facilities for activities in the lab is not yet available as it should be. Based on this, inthis research, a practicum module for an embedded system based on Raspberry Pi will bedesigned and made (Module 2: implementation of a simple system). This practicum module hasthree experiments, namely a lamp control system and a 5 V DC motor equipped with an LDRsensor (experiment 1); monitoring the water level using the HC-SR04 sensor module and theheight data is displayed on a 16 x 2 LCD (experiment 2); Human movement detection uses theHC-SR501 sensor module with output in the form of audio that is channeled to the speaker, theimage display by the 0.96 inch OLED module, and the rotation of the LDR servo shaft(experiment 3). The results obtained in the three experiments are that all systems worksuccessfully with the following conditions: The load on the relay turns on when the LDR sensorcondition is covered with black cloth, the load on the relay goes out when the LDR sensorcondition is left unobstructed and the LDR sensor is illuminated by an LED flashlight. The LEDindicator lights up according to the condition of the water level reading by the HC-SR04 sensormodule. The HC-SR501 sensor module successfully detects the movement of objects in theform of humans at a distance of 1 m, 1.5 m, and 3 m.

PERANCANGAN MODUL PEMBELAJARAN HURUF BRAILLE BERBASIS MIKROKONTROLER UNTUK MEMBANTU PROSES BELAJAR DISABILITAS NETRA I Putu Agus Padma Diana; I Gusti Agung Putu Raka Agung; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 5 No 1 (2018): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

We design Braille-learning module based on microcontroller as a helping tool for Braille-learning process for people with vision disabillity. The main operating system used is Arduino ATMega 2560 as the input data processor and provide output commands according to planning. The result is a system consists of a push-button Keyboard for data input, DFPlayer mini for sound output and a LCD for character display. Braille-learning module can be used for 5.6 hours under standby keyboard module condtion and 5.04 hours in keyboard module condition suppressed with minimum or maximum mini DFPlayer volume.

SISTEM PENYIRAMAN OTOMATIS MENGGUNAKAN RTC (REAL TIME CLOCK) BERBASIS MIKROKONTROLER ARDUINO MEGA 2560 PADA TANAMAN MANGGA HARUM MANIS BULELENG BALI Pratolo Rahardjo
Jurnal SPEKTRUM Vol 8 No 1 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Along with technological developments, various technological innovations have begunto emerge that can be applied to facilitate individual or group work. One of them is the use ofappropriate technology, namely the use of technology in a field that can provide real benefit.Researchers designed an automatic watering system using RTC (Real time clock) based on theArduino Mega 2560 microcontroller. This watering system works automatically based on aspecified watering schedule according to the user's wishes. Users can set the watering timeeasily because the system is equipped with a keypad. Based on the results of tests carried out,the watering process occurs, when the time displayed on the LCD is the same as the timesetting given. Long watering duration of approximately 1 minute.

Algoritma Backtracking Pada Perjalanan Pulang Robot Pemadam Api Arya Sukma Krisnayoga; Yoga Divayana; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Kontes Robot Pemadam Api Indonesia or commonly in short KRPAI is a robot competition that has the main mission of putting out fires. During the competition there are several bonus points that must be taken. One bonus that must be taken is the robot able to return home after holding a fire. In this research the KRPAI Udayana University robot will use the backtracking algorithm to return home. The purpose of using backtracking alogritma is to shorten the distance back home to the robot. In KRPAI University robot Udayana use SRF-05 sensors to measure the distance of the robot to the wall and use 18 servo as the driving leg of the robot. the use of backtracking algorithm, the path that has been passed by the robot when looking for fire will be simplified. the results of the simplification of the fire search path will be used as the return route. Based on the test results, using the robot backtracking algorithm is able to minimize the distance traveled when returning home, the room entered is only 1 room, and there is no detecting dolls.

Pengendali Mobile Robot Melalui Bluetooth Berbasis Mikrokontroler AVR ATmega8 Dilengkapi Lengan dan Kamera Obed Bettuang; I G A Putu Raka Agung; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 2 No 2 (2015): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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Mobile robot adalah robot yang dapat bergerak atau berpindah tempat dengan menggunakan roda serta dapat dikendalikan secara otomatis maupun manual. Teknologi bluetooth dapat dimanfaatkan untuk mengendalikan mobile robot secara manual. Bluetooth yang dipakai menggunakan bluetooth serial HC-07. Setiap pergerakan mobile robot dikendalikan melalui Laptop dengan cara mengirimkan karakter tertentu dari keyboard Laptop. Driver motor menggunakan IC L293D dengan arus output maksimal 1,2 Ampere. Mikrokontroler ATmega8 dapat mengolah data yang diterima bluetooth serial HC-07 sehingga dapat mengendalikan mobile robot bergerak maju, mundur, belok kanan, belok kiri, stop, mengerakkan lengan secara otomatis dan manual, serta menampilkan setiap data instuksi ke dalam LCD.

RANCANG BANGUN SISTEM MONITORING PADA HIDROPONIK NFT (NURTIENT FILM TEHCNIQUE) BERBASIS IOT Lindu Pamungkas; Pratolo Rahardjo; I Gusti Agung Putu Raka Agung
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The use of hydroponics is an effective way to carry out farming activities without theneed for large tracts of land. Hydroponics requires extra supervision to be able to produceplants with good quality. There are three main parameters in hydroponics, namely the amountof dissolved nutrient content, the pH level in water, and the water suhue level. To provideconvenience in conducting surveillance, this research designed an IoT-based NFT hydroponicmonitoring system. The use of TDS sensors, pH sensors, and temperatur sensors DS18B20 inthis study are used to measure any changes that occur in the three parameters. Sensor datawill be processed by Arduino Mega 2560 and sent to Firebase databases via NodeMCUESP8266 which is connected to the internet network, so users can supervise anytime andanywhere through the android mobile application.

RANCANG BANGUN SCORING BOARD MENGGUNAKAN JOYSTICK BERBASIS ARDUINO YANG DIGUNAKAN PADA LATIH TANDING TAEKWONDO Komang Agus Werdi Darmayasa; I Gusti Agung Putu Raka Agung; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 5 No 2 (2018): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Taekwondo is one of the martial arts competitions competed in the Olympics. Taekwondo comes from Korea, Tae means "kicking or destroying with legs"; Kwon means "boxing"; and Do means "road" or "art". The taekwondo match is led by a referee and a judge who is responsible for giving scores to athletes who get points. During taekwondo match training, the assessment is still done in a manual way so that electronic score equipment is needed that is portable and easy to operate. Based on this, there is a desire to make electronic score equipment used for taekwondo match training by creating a scoring board using an Arduino-based joystick. The Arduino-based scoring board uses two PS3 sticks that are connected to Arduino wirelessly using Bluetooth and received by the joystick receiver. The display value of this match training will be displayed on the LED Matrix display in the form of numbers / scores. The time and the taekwondo match training round are displayed on the seven segment display and are set at the beginning of the practice match using a blue joystick. When the match time runs out, there will be a sound issued by the buzzer. From the research conducted, it is expected to be able to facilitate assessment when competing in taekwondo training.

RANCANG BANGUN MODUL PRAKTIKUM SISTEM EMBEDDED BERBASIS RASPBERRY PI (PENGONTROLAN DASAR LED, LED DOT-MATRIX, DAN SEVEN SEGMENT DISPLAY) Muhammad Abdul Hadi; Pratolo Rahardjo; I Putu Elba Duta Nugraha
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Embedded system is microprocessor-based systems that are used to perform certainfunctions. Embedded systems learning is very much needed, especially for students ofElectrical Engineering, Faculty of Engineering, Udayana University. This is evidenced by theexistence of a new course, namely the Embedded + Lab System. To support the convenienceof practicum in the laboratory, in this study, an Embedded+Lab System practical guide will bedesigned and built by utilizing the Single Board Microcomputer Raspberry Pi. It is hoped thatthis Embedded+Lab System practical guide will be useful for Electrical Engineering students,Faculty of Engineering, Udayana University. This research carried out several basic designsthat will be used in the Embedded System module 1 practical experiment, namely the design ofa Light Emitting Diode (LED) control, LED DOT-Matrix, and seven segment display. The designof each control system will generally be divided into two parts, namely hardware design andsoftware design. The results of this study are a box 1 system embedded practical module andpractical guides, as well as the design of each control system, all of which work well.

Co-Authors Adrian Pramuditya, I Made Agustadewa, Yosia Alie Sulthan, Mayben Sayyidina Alif Rizqian Aki Arya Sukma Krisnayoga D M Baskara Puruhita Wija Efina Marianis Elba Duta Nugraha, I Putu Gea, Susi Susanti Gede Prananda Putra Gede Widi Kurniawan Hernandi, William Hindro Kusumo Wahid I Gede Agus Darmawan I Gede Feryanda Frasiska I Gede Hery Putrawan I Gede Yogi Astawan I Gst Agung Putu Raka Agung I Made Adi Wijaya I Made Anand Gopal I Made Nova Suardiana I Nengah Raka Utama I Nyoman Budiastra I Putu Agus Padma Diana I Putu Elba Duta Nugraha I Putu Elba Duta Nugraha, I Putu Elba I Putu Nugraha I Putu Pawesi Siantika I Wayan Yoga Widiana Ida Bagus A. Swamardika Indra Christian, Febry Kadek Bintang Anjasmara Komang Agus Werdi Darmayasa Komang Edy Surya Prabowo Komang Oka Saputra Langit, Sekar Lie Jasa Lindu Pamungkas Liwa Purnadita, Putu Tesa Made Bayu Pranata Mudjirahardjo, Panca Muhammad Abdul Hadi Nugraha, I Putu Elba Duta Obed Bettuang Oka Saputra, Komang Pande Made Agus Yudi Adnyana Pande Made Nova Paramarta Putu Althea Putri Wiradani Putu Arya Mertasana Raka Agung, I G A Putu Raka Agung, I Gusti Agung Pt Rizki Pradana Putra Sekar Langit Susi Susanti Gea Tander Risard Lowongan Yoga Divayana

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