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All Journal International Journal of Electrical and Computer Engineering International Journal of Applied Power Engineering (IJAPE) Jurnal Sains Materi Indonesia Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) JOURNAL AGRIBUSINESS TELKOMNIKA (Telecommunication Computing Electronics and Control) JURNAL LITIGASI (e-Journal) Jurnal Matematika & Sains Journal of Mathematical and Fundamental Sciences JOIV : International Journal on Informatics Visualization Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Yudisial Indonesian Journal of Criminal Law Indonesian Journal of Electrical Engineering and Computer Science Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Indonesian Journal of Physics (IJP)

Maman Budiman

Institut Teknologi Bandung

Author-ID : 244349

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Low-cost wireless mesh communications based on openWRT and voice over internet protocol Nina Siti Aminah; Muhamamad Reza Ramadhani Raharjo; Maman Budiman
International Journal of Electrical and Computer Engineering (IJECE) Vol 11, No 6: December 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v11i6.pp5119-5126

Technology makes it easier for us to communicate over a distance. However, there are still many remote areas that find it difficult to communicate. This is due to the fact that communication infrastructure in some areas is expensive to build while the profit will be low. This paper proposes to combine voice over internet protocol (VoIP) over mesh network implemented on openWRT router. The routers are performing mesh functions. We set up a VoIP server on a router and enabled session initiation protocol (SIP) clients on other routers. Therefore, we only need routers as a means of communication. The experiment showed very good results, in the line-of-sight (LOS) condition, they are limited to reception distances up to 145 meters while in the non-line-of-sight (NLOS) condition, they are limited to reception distances up to 55 meters.

A Low Cost C8051F006 SoC-Based Quasi-Static C-V Meter for Characterizing Semiconductor Devices Endah Rahmawati; Riska Ekawita; Maman Budiman; Mikrajuddin Abdullah; Khairurrijal Khairurrijal
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 10, No 4: December 2012
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v10i4.862

Based on a C8051F006 SoC (system on-a-chip), a simple and low cost quasi-static capacitance-voltage (C-V) meter was designed and developed to obtain C-V characteristics of semiconductor devices. The developed C-V meter consists of a capacitance meter, a programmable voltage source, a C8051F006 SoC-based slave controller, and a personal computer (PC) as a master controller. The communication between the master and slave controllers is facilitated by the RS 232 serial communication. The accuracy of the C-V meter was guaranteed by the calibration functions, which are employed by the program in the PC and obtained through the calibration processes of analog to digital converter (ADC), digital to analog converters (DACs) of the C8051F006 SoC, and the programmable voltage source. Examining 33-pF and 1000-pF capacitors as well three different p-n junction diodes, it was found that the capacitances of common capacitors are in the range of specified values and typical C-V curves of p-n junction diodes are achieved.

KARAKTERISTIK ARUS FILM TIPIS CeO2 DAN Nd-CeO2 YANG DIDEPOSISIKAN DI ATAS SUBSTRAT Si(100) MENGGUNAKAN TEKNIK PULSED-LASER ABLATION DEPOSITION (PLAD) Iis Nurhasanah; Khairurrijal Khairurrijal; Mikrajudin Abdullah; Bambang Ariwahjoedi; Maman Budiman; Sukirno Sukirno
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

KARAKTERISTIK ARUS FILM TIPIS CeO2 DAN Nd-CeO2 YANG DIDEPOSISIKAN DI ATAS SUBSTRAT Si(100) MENGGUNAKAN TEKNIK PULSED-LASER ABLATION DEPOSITION (PLAD). Karakteristik arus film tipis CeO2 dan Nd-CeO2 yang dideposisikan di atas substrat p-Si(100) menggunakan teknik Pulsed-Laser Ablation Deposition (PLAD) telah diamati melalui pengukuran arus-tegangan (I-V). Film tipis CeO2 memiliki rapat arus yang lebih besar 2 orde dari film tipis Nd-CeO2. Perbedaan rapat arus dapat dijelaskan berdasarkan perbedaan orientasi kristal, keadaan trap dan tinggi potensial penghalang. Mekanisme konduksi yang terjadi terutama adalah Space-Charge Limited Current (SCLC) pada tegangan rendah dan emisi Schottky pada tegangan tinggi. Diketahui pula bahwa potensial penghalang film tipis Nd-CeO2 lebih besar dari film tipis CeO2 dan memberikan kontribusi terhadap penurunan rapat arus.

STUDI PENGARUH KONSENTRASI AL PADA STRUKTUR KRISTAL DAN MORFOLOGI FILM TIPIS AlxGa1-xN/Si(111) YANG DITUMBUHKAN DENGAN TEKNIK PA-MOCVD Heri Sutanto; Agus Subagio; Edy Supriyanto; Pepen Arifin; Sukirno Sukirno; Maman Budiman; Moehamad Barmawi
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

STUDI PENGARUH KONSENTRASI AL PADA STRUKTUR KRISTAL DAN MORFOLOGI FILM TIPIS AlxGa1-xN/Si(111) YANG DITUMBUHKAN DENGAN TEKNIK PA-MOCVD. Film tipis AlxGa1-xN telah ditumbuhkan di atas substrat Si tipe-p dengan menggunakan teknik PA-MOCVD. Film tipis AlxGa1-xN ditumbuhkan dengan parameter-parameter: suhu substrat, laju alir N2, TMGa dan TMAl berturut-turut sebesar 700 oC; 90 sccm; 0,1 sccm dan 0,01sccm hingga 0,04 sccm. Film polikristal AlxGa1-xN yang ditumbuhkan mempunyai struktur heksagonal dengan bidang difraksi dominan (1010) dan (1011) hingga konsentrasi Al sebesar 6,78%. Diperoleh nilai kekasaran permukaan film dari pengukuran SPM pada range 11,44 nm sampai dengan 27,20 nm. Morfologi permukaan film semakin halus dengan peningkatan konsentrasi Al pada film. Penurunan nilai konstanta kisi hasil pengujian XRD terjadi karena kekosongan nitrogen pada film. Peningkatan konsentrasi Al pada film menyebabkan penurunan laju penumbuhan film tipis AlxGa1-xN yang terbentuk.

FABRIKASI FILM TIPIS SEMIKONDUKTOR FEROMAGNETIK TiO2-Co DENGAN TEKNIK MOCVD DAN PENGAMATAN MAGNETORESISTANSI Edy Supriyanto; Horasdia Saragih; Agus Subagio; Maman Budiman; Pepen Arifin; Moehammad Barmawi; Sukirno Sukirno
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

FABRIKASI FILM TIPIS SEMIKONDUKTOR FEROMAGNETIK TiO2-Co DENGAN TEKNIK MOCVD DAN PENGAMATAN MAGNETORESISTANSI. Film tipis TiO2-Co telah berhasil ditumbuhkan di atas subtrat Si dengan teknik MOCVD. Film tipis TiO2-Co bersifat feromagnetik pada suhu ruang, dan memiliki respon magnetik lunak (soft magnetic). Penggunaannya sebagai material injektor pada divais spintronika berstruktur TiO2-Co/Si/TiO2-Co, diinvestigasi. Karakteristik arus-tegangannya, tanpa dan dengan medan magnetik luar, dianalisa. Teramati adanya pengaruh magnetik terhadap resistansi divais yang disebut sebagai magnetoresistansi. Magetoresistansi diperoleh bergantung pada besarnya tegangan bias yang diberikan pada divais. Penambahan tegangan ke suatu nilai tertentu dapat menghilangkan efek magnetoresistansi.

DEPOSISI FILM TIPIS CERIA DIDADAH Nd MENGGUNAKAN TEKNIK PULSED-LASER ABLATION DEPOSITION (PLAD) lis Nurhasanah; Khairurrijal .; Mikrajuddin Abdullah; Bambang Ariwahjoedi; Maman Budiman; Sukirno .
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 7, No 2 (2006): Agustus 2006
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jstni.2006.7.2.2137

DEPOSISI FILM TIPIS CERIA DIDADAH Nd MENGGUNAKAN TEKNIK PULSED-LASER ABLATION DEPOSITION (PLAD). Film tipis ceria didadah Nd (Nd-doped ceria/NDC) telah berhasil dideposisikan di atas substrat Si(100) pada ~temperatur 400°C menggunakan teknik pulsed-laser ablation depostion (PI‑AD) dalam kondisi vakum dan tekanan 02 antara 15 - 29 mTorr. Analisis difraksi sinar-x, scanning electron microscopy (SEM), dan energy dispersive x-ray (EDX) digunakan untuk mengamati struktur, ketebalan dan komposisi kimia film. Hasil studi ini menunjukkan bahwa tekanan 02 selama proses deposisi menentukan kristalisasi, ketebalan film dan komposisi atom dalam film. Film tipis NDC dengan struktur kompak dan komposisi beragam yang diperoleh menunjukan bahwa teknik PLAD berpotensi untuk menghasilkan film tipis elektrolit yang penting bagi solid electrolyte fuel cell (SOFC).

THE IMPLEMENTATION OF DISAGGREGATION ALGORITHM IN THE ANALYSIS OF ENERGY CONSUMPTION BASED ON THE INTERNET-OF- THINGS TECHNOLOGY Husein H; Aditya Alviori; Maman Budiman; Mitra Djamal
AGRIBUSINESS JOURNAL Vol 13, No 1 (2019): AGRIBUSINESS JOURNAL
Publisher : Departement of Agribusiness Faculty of Science and Technology

The effort to reduce the mass energy usage without involvement of consumers is not effective. Thereby, creating a pathway for anyone of consumer to be much more involved in the energy-saving effort. The implementation of disaggregation algorithm in the analysis of energy consumption is to recognize when and which appliance has the largest energy consumption and being able to control the state of all appliances from anywhere. In this research, the principle of disaggregation is event-based and low-sampling data frequency. A KWH-meter is used to send power data to the cloud server via MQTT protocol. The cloud server gathers the energy-consumption data, analyses them and then disaggregates them. The output of the disaggregation algorithm would tell the state (on/off), the average power and the percentage of energy consumed by each appliances. The output will then be sent from the cloud server to Android Apps via MQTT protocol. Then the consumer can easily access and control the energy consumption from their smartphone after knowing it through the disaggregation algorithm.

A Simple Microcontroller-Based 4-20 mA Current Loop Receiver for Sensors with Current Transmitters Arif Surachman; A. Suhendi; Maman Budiman; Mikrajuddin Abdullah; Khairurrijal Khairurrijal
Jurnal Otomasi Kontrol dan Instrumentasi Vol 2 No 1 (2010): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2010.2.1.2

A current loop receiver system based on a microcontroller has been developed. The current loop receiver system can serve 8 gas sensors with 4-20 mA outputs, which are handled by employing a multiplexer. The data acquisition of the system is composed of a common operational amplifier-based current loop receiver, a CD4051 multiplexer, an ADS7822 serial analog to digital converter (ADC), and an AT89S52 microcontroller. The measured gas concentration is displayed on the 7-segments or transmitted to a personal computer via the RS232 serial communication to be processed by the Microsoft Excel. Additional functions such as gas concentration level warning and error code display are also provided. Keywords:4-20 mA, Current loop, Microcontroller, Receiver, Transmitter

Sistem Kontrol Otomatik Pembatasan Daya Listrik Berbasis Mikrokontroler PIC18F4520 Nur A. Aprianti; Indra W. Fathona; Suprijadi Suprijadi; Maman Budiman; Khairurrijal Khairurrijal
Jurnal Otomasi Kontrol dan Instrumentasi Vol 2 No 2 (2010): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2010.2.2.6

Sistem kontrol otomatik yang diterapkan untuk membatasi daya listrik telah dirancang dan dikembangkan berbasis mikrokontroler PIC18F4520. Dalam melakukan pengontrolan, sistem tersebut menggunakan aksi kontrol on-off. Sebagai aktuator digunakan Triac beserta drivernya sedangkan sensornya menggunakan sensor arus berbasis efek Hall. Sistem tersebut dilengkapi keypad untuk memasukkan set point arus dan peraga LCD untuk memantau arus yang terukur. Dari pengujian yang telah dilakukan, ditunjukkan bahwa sistem telah berjalan baik. Aksi kontrol PID (proporsional-integral-diferensial) disarankan menggantikan on-off untuk pengontrolan yang lebih baik. Kata kunci: Aksi kontrol on-off, Kontrol otomatik, Mikrokontroler PIC18F4520, Pembatas Daya, Sensor efek Hall, TriacAbstractAutomatic control system for controlling the electronic power has been designed and developed based on microcontroller PIC18F4520 and on-off control action. This system uses Triac and its driver as an actuator and Hall Effect-based current sensor. This system also provided with a keypad to enter the set point current and LCD display to monitor the flow measured. From the testing that has been conducted, it was showed that the system has been running well. PID (proportional-integral-differential) controller is suggested to replace the on-off controller for better controlling. Keywords: on-off control action, Automatic control, Microcontroller PIC18F4520, Power restrain, Hall Effect sensor, Triac

Pengembangan Universal Audio Scrambler Menggunakan Teknik Orthogonal Frequency Division Multiplexing (OFDM) Maman Budiman; R Riyanto; Y Fitri; A Adnan
Jurnal Otomasi Kontrol dan Instrumentasi Vol 3 No 1 (2011): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2011.3.1.6

AbstrakTelah didesain sebuah alat universal audio scrambler menggunakan teknik OFDM yaitu suatu teknik modulasi yang menggunakan banyak frekuensi (multicarrier) yang saling tegak lurus (orthogonal). Teknik ini dilakukan dengan menggunakan transformasi Fourier balik (Invers Fast Fourier Transform/IFFT) yang mengubah domain frekuensi menjadi domain waktu pada bagian pemancar (transmitter) sedangkan pada penerima menggunakan tranformasi Fourier (Fast Fourier Transform/FFT) untuk mendapatkan kembali sinyal dalam domain frekuensi. Frekuensi output dari transmitter didesain berada pada daerah frekuensi audio dengan bandwith 2,4 kHz sehingga dapat diterapkan pada berbagai jenis alat komunikasi. Alat ini menggunakan kompresi suara CVSD dengan ratio 1:8 dan mapping 16PSK untuk memperkecil jumlah bit data. Kecepatan transfer data (data rate) alat ini adalah 8 kbps. Desain juga diuji performanya terhadap variasi noise pada kanal transmisi dan terhadap frekuensi offset akibat efek doppler. Hasilnya, desain bekerja baik pada SNR di atas 60 dengan toleransi frekuensi offset sebesar 5 Hz. Kata kunci: audio scrambler, OFDM, IFFT/FFT, 16PSK, CVSD.AbstractUniversal audio scrambler has been designed using OFDM technique, a modulation technique which uses multi-frequency (multi-carrier) that is orthogonal to each other. This technique is performed using Invers Fast Fourier Transformation (IFFT), which changes the frequency domain into time domain at the transmitter, while the receiver using Fast Fourier Transformation (FFT) to get the signal back in the frequency domain. The output frequency of the transmitter is designed to be in the audio frequency area (2.4 kHz bandwidth), so that it can be applied to various types of communication tools. This tool uses CVSD voice compression with 1:8 ratios and 16PSK mapping to minimize the number of data bits. Data transfer speed (data rate) for this tool is 8 kbps. The design was also tested its performance against the variation of noise in transmission channels and the frequency offset due to Doppler effect. As a result, the design works well at SNR above 60 with a tolerance offset frequency of 5 Hz. Keywords: audio scrambler, OFDM, IFFT/FFT, 16PSK, CVSD.

Co-Authors A Adnan A. Suhandi A. Suhendi Abdul Muid Abdul Muid Aditya Alviori Agus Subagio Agus Subagio Alifa Febiola Yasmin Aminah, Nina Siti Ant. Ardath Kristi Arif Surachman Bambang Ariwahjoedi Bambang Ariwahjoedi Beny Agustirandi Budi Mulyanti Darsikin Darsikin Edi Supriyanto Edy Supriyanto Efraim Partogi Endah Rahmawati Euis Sustini Evita, Maria Fitri Suryani Arsyad Goib Wiranto Heri Sutanto Hery Sutanto Horasdia Saragih Husein H Iis Nurhasanah Inayatul Inayah Indra Wahyudin Fathonah Irzaman, Irzaman Khairurrijal Khairurrijal Lilik Hasanah lis Nurhasanah M. Barmawi Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajudin Abdullah Mitra Djamal Mitra Djamal Moehamad Barmawi Moehammad Barmawi Mohamad Barmawi Muhamad Barmawi Muhamamad Reza Ramadhani Raharjo Ngurah Ayu Ketut Umiati Nina Aminah, Nina Nina Siti Aminah Nur A. Aprianti Pepen Arifin Prianka Anggara R Riyanto Riska Ekawita Sony Wardoyo Sugianto - Sukirno . Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Suprijadi Suprijadi Suprijadi Suprijadi Yulia Fitri Zulirfan Zulirfan

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