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All Journal Indonesian Journal of Electronics and Instrumentation Systems

Agfianto Eko Putra

Jurusan Ilmu Komputer dan Elektronika, FMIPA UGM, Yogyakarta

Author-ID : 2898796

Electrical & Electronics Engineering

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Metode Stereo Cancelation untuk Vocal Removal pada Lagu Pop, Rock, dan Jazz Rahmanu Hermawan; Agfianto Eko Putra; Catur Atmaji Atmaji
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 4, No 1 (2014): April
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

Penelitian ini mengujikan metode stereo cancelation kepada tiga jenis aliran musik yang sering didengarkan oleh orang-orang yaitu aliran pop, rock, dan jazz. Pengujian bertujuan untuk mengetahui efektivitas/keakuratan metode stereo cancelation terhadap cara bernyanyi yang berbeda-beda. Ketiga aliran musik tersebut mempunyai karakter cara bernyanyi yang berbeda pula. Analisis keakuratan dilakukan dengan dua cara, yaitu dengan analisis spektrum frekuensi dan menggunakan survei kepada para pemusik di Jogjakarta.Hasil yang didapatkan dari pengujian yang dilakukan adalah metode stereo cancelation bekerja dengan baik di ketiga jenis aliran dengan efek samping berupa kehilangan suara bass pada masing-masing lagu. Berdasarkan penilaian responden, sebanyak 62% responden menilai bahwa atenuasi vokal pada lagu jazz dinilai baik. Sedangkan untuk lagu pop dan rock dinilai baik oleh 64% responden. Kata kunci--stereo cancelation, vocal removal, analisis spektrum. This research is testing stereo cancelation method to three types of music that are often heard by those people that pop, rock, and jazz. Testing aims to determine the effectiveness of stereo cancelation when meets a variative singing method. The analysis of effectiveness is done in two ways, namely by analysis of the spectrum of frequencies and use of surveys of the musicians at Jogjakarta.The result is stereo cancelation method works well in all three music genres with side effects such as loss of bass sounds on each track. Based on the survey, 62% of responden assess that the result of stereo cancelation on jazz is well. While 64% of responden assess that the pop and rock music have a good result too. Keywords--stereo cancelation, vocal removal, spectrum analysis.

Electronic Power System untuk Satelit Nano Triawan Nugroho; Agfianto Eko Putra; Bakhtiar Alldino
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 4, No 2 (2014): October
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

AbstrakSebuah electronic power system telah dirancang dan diimplementasikan untuk menyimpan dan menyalurkan energi listrik. Electronic power system merupakan bagian penting dari satelit yang berfungsi untuk menghasilkan, menyimpan dan menyalurkan listrik. Apabila terjadi kegagalan pada electronic power system, maka seluruh sub sistem yang mendapatkan pasokan daya akan mengalami gangguan. Electronic power system satelit nano yang diteliti berbasis mikrokontroller keluarga AVR, ATMega 8. Sistem ini dilengkapi dengan sensor ACS712, sensor MAX7500, regulator switching LM2576 dan multiplekser DG560A. Hasil dari penelitian ini adalah sebuah electronic power system yang berfungsi menyalurkan arus dan tegangan pada masing-masing channel yang digunakan, yaitu 3.3 V, 5 V dan 12V, serta mampu mengendalikan arus dan tegangan apabila terdapat kelebihan beban. Data digabung dalam format string yang dikirim melalui komunikasi serial dan ditampilkan pada Graphical User Interface (GUI). Data hasil pengukuran arus dan tegangan juga dapat disimpan dalam bentuk excel. Kata kunci— Nanosatelit, eps, sensor, power system Abstract An electronic power system has been made and implemented to be able to save and distribute electrical power. Electronic power system is an important part of satellite that function to produce, to save and to distribute electrical. If suffers failure on electronic power system, then all the subsystem receiving the supply of power will be in default. Electronic power system of nano satellite that researched is based on microcontroller of AVR family, ATMega 8. This system is completed by ACS712 sensor, MAX7500 sensor, switching LM2576 regulator and DG560A multiplexer. The result of this research is an electronic power system that function to distribute the current and the voltage in each channel used, namely 3.3 volt, 5 volt, and 12 volt, and able to control the current and voltage if there is overloaded. All these data are then bundled into a single data string which is sent by serial communication and displayed on Grafical User Interface ( GUI ). Data of result of measurement the current and voltage can be deposited in the excel form. Keywords—Nanosatellite, eps, sensor, power system

Sistem Pemantauan Ruangan Dengan Server Raspberry Pi Egrit Nurcahyo Wijatsongko; Agfianto Eko Putra; Bambang Nurcahyo Prastowo
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 5, No 1 (2015): April
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

Continuous record will overload storage, due to big size recorded video files. One of the solution to this problem is to make system only record at necessary time. The example of the “necessary time” is when someone enter the room. Because of that, surveillance system which can detect motion in the room is needed. In this research, mentioned problem was tried to be solved by design and build a mini computer (Raspberry Pi) based room surveillance system. This surveillance system is made with Motion program. Motion program handle motion detection and streaming. Besides that, system also made so it can send notification via email, when motion is detected. For security and back up data reasons, system will also upload recorded video to Google Drive. System consists of one server and one client that are connected using WLAN network. The System performance was tested by observing recorded video frame rates as parameter. The motion detection of the system was also tested on various light intensity. From the test, got that the best condition for the system is at frame size 320x240 with light intensity more than 8 lux.

Desain dan Implementasi On-Board Computer/ On-Board Data Handling (OBDH) pada UGM-SAT Bakhtiar Alldino Ardi Sumbodo; Agfianto Eko Putra
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 5, No 1 (2015): April
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

The engineering model of OBDH for UGM-SAT was designed to control data handling program and tointerface the satellite subsystems to OBDH. The OBDH’s based on the Microchip microcontroller PIC16F877A with 20 Mhz clock speed. The system’s equipped with four external 24LC512 EEPROM’s with a storage capacity of 256 kB. The external memories’re used to store housekeeping information. The system’s equipped with a ACS712ELCTR-05B-T current sensor, voltage sensor and LM335Z temperature sensor. The accuracy of the measurements’re more than 99%. The system’s also equipped with IC Real Time Clock (RTC) DS3232M with an internal clock of 32.768 Hz, which’s used to synchronize the time between OBDH with other subsystems.The components of OBDH was chosen with industrial standards, small packages and low power. OBDH’s designed to operate in environments with extreme temperature conditions. The communication with other subsystems was designed to use I2C-bus. Protocol data for communication between the satellite subsystems have been designed. A HammingCode(8,4) algorithm has been implemented to protect housekeeping information from being corrupted due to radiation. Error detection and correction speed is 1.800 byte/s. The engineering model of OBDH for UGM-SAT have met the standard specifications, and ready for further testing hardware and software.

Balancing Robot Menggunakan Metode Kendali Proporsional Integral Derivatif Rizka Bimarta; Agfianto Eko Putra; Andi Dharmawan
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 5, No 1 (2015): April
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

Center of gravity’s inverted pendulum is located above its pivot point therefore inverted pendulum is unstable. Specific control is needed so that inverted pendulum stable which is by move the cart where the pendulum is mounted. Inverted pendulum application can be found in balancing robot. The purpose of this research is to design a system to control a two wheeled robot using the control system to balance it.The inputs are accelerometer to measure angular acceleration (m/s2) and gyroskop to measure angular velocity (rad/s). The output’s of accelerometer and gyroscope are fused by complementary filter algorithm method to get the actual angle. The actual angle is then compared to set point which is 0o. The differences between set point and actual angle are processed using Proportional Integral Derivative control method. The process of PID control is programmed using Arduino IDE which its result is fed to DC motors. The direction of DC motors are determined by two conditions, if actual angle less than zero then DC motors will spin backwards. Whereas if actual angle more than zero then DC motors will spin forward. The PID control’s constans value based on Ziegler-Nichols Oscillation tuning method are Kp=1.5, Ki=0.75, Kd=1.875 and complementary filter’s coefficient is a=0.96.

Co-Authors Andi Dharmawan Bakhtiar Alldino Bakhtiar Alldino Ardi Sumbodo Bambang Nurcahyo Prastowo Catur Atmaji Atmaji Egrit Nurcahyo Wijatsongko Rahmanu Hermawan Rizka Bimarta Triawan Nugroho

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