Articles
<![CDATA[RANCANG BANGUN VENDING MACHINE MENGGUNAKAN QR CODE BERBASIS MIKROKONTROLER ]]>
<![CDATA[Rizki Pradana Putra]]>;
<![CDATA[I Gusti Agung Pt Raka Agung]]>;
<![CDATA[Pratolo Rahardjo]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 2 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (745.459 KB)
|
DOI: 10.24843/SPEKTRUM.2019.v06.i02.p15
<![CDATA[One of the technologies that continues to be developed today is automated system technology. An automatic system that has the potential to continue to develop in this modern era is the vending machine. Along with the development of technology, vending machines have begun to be developed using tags / RFID cards (Radio Frequency Identification) in lieu of paper money. The disadvantage of this system is the dependence of machine activation on an RFID tag / card that still has security risks. Therefore, a vending machine will be developed using QR (Quick Response) Code and integrated with an Android-based smartphone instead of RFID. The microcontroller based vending machine system uses a QR Code to work to serve drinks automatically after processing serial data sent by a smartphone through an application that has been designed with Bluetooth communication. Users can register an account on the application and fill in the balance to buy canned drinks at the vending machine.]]>
<![CDATA[RANCANG BANGUN ALAT PENGINGAT PENGGANTIAN WATER FILTER MC2 MEMANFAATKAN SMS BERBASIS MIKROKONTROLER ATMEGA-328 ]]>
<![CDATA[I Putu Nugraha]]>;
<![CDATA[I Gst.A.Putu Raka Agung]]>;
<![CDATA[Pratolo Rahardjo]]>
<![CDATA[ Jurnal SPEKTRUM Vol 3 No 2 (2016): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (1133.415 KB)
<![CDATA[Perusahaan produsen minuman, mengandalkan air sebagai bahan baku utama untuk memproduksi produknya. Untuk menjamin kualitas air yang digunakan, diperlukan saringan (filter) air yang dapat menangkap maupun menghilangkan kotoran dan bakteri-bakteri yang masih terkandung pada air. Seiring dengan pemakaian filter air secara terus menurus, maka diperlukan tindakan penggantian filter air secara berkala agar kualitas air yang dihasilkan tetap terjaga. Jika penggantian filter air tidak dilaksanakan, maka kerusakan pada mesin produksi minuman dapat terjadi. Untuk mengatasi masalah tersebut, telah dirancang dan direalisasikan suatu alat untuk mengingatkan penggantian water filter dengan memanfaatkan SMS berbasis mikrokontroler ATMEGA-328. Metode dalam pembuatan alat ini terdapat perangkat keras yang terdiri dari perangkat elektronika dan perancangan media filter air MC2. Perangkat lunak menggunakan bahasa C arduino. Perangkat elektronika water flow sensor dan water pump pressure switch dipasangkan pada jalur air media filter. Kapasitas pemakaian air yang telah melewati media filter air MC2 dibaca oleh water flow sensor dan tekanan airnya dibaca oleh water pump pressure switch. Hasil dari pembuatan alat ini ditandai dengan SMS peringatan yang dikirimkan ke nomor HP tujuan jika air yang melewati filter air MC2 sudah mencapai kapasitas kadaluarsanya dan jika tekanan air yang dihasilkan filter air MC2 sudah mengecil yang ditandai dengan alarm berupa buzzer.]]>
<![CDATA[SISTEM PESAWAT TANPA AWAK MENGGUNAKAN KAMERA THERMAL UNTUK MEMBANTU PENCARIAN KORBAN BENCANA ALAM ]]>
<![CDATA[I Gede Feryanda Frasiska]]>;
<![CDATA[Ir. I Nyoman Budiastra, MKes., MT]]>;
<![CDATA[Pratolo Rahardjo, S.T.,M.T.]]>
<![CDATA[ Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (435.547 KB)
|
DOI: 10.24843/SPEKTRUM.2020.v07.i04.p13
<![CDATA[In Indonesia, the weather is influenced by seasons, namely the dry season and the rainyseason. Apart from weather, natural disasters can also occur due to the earth's tectonicpatterns, either in the form of tsunamis or earthquakes. Every natural disaster will have adetrimental impact on society both economically and socially. The impact of a disaster like anearthquake is the collapse of buildings. Collapsed buildings due to earthquakes can leave largenumbers of people dead or buried in the rubble. The evacuation process of post-disaster victimsmust be carried out immediately to reduce the risks posed by the disaster, such as the numberof casualties caused by delays in the evacuation process. Based on these problems,researchers are motivated to create a technological innovation that can help the SAR team iinthe processs of detecting victims from debris through the air by detecting the victims bodytemperature, the number of victims and showing the coordinates of the victim's position.disaster victims. The tool is called DROPBA, which is an Unmanned Aircraft System or UAVthat uses thermal cameras to help search for victims of natural disasters. The SAR team at thepost will control DROPBA or Unmanned Aircraft to detect disaster victims who are in the wreck,and inform the SAR team information wirelessly in the form of a path to the position of thedisaster victim. The design results are in the form of a 3-dimensional model image from the DROBA tool and the components and camera systems used are a thermal camera connectedto the Raspberi pi system and image processing using Open CV.]]>
<![CDATA[DETEKTOR LPG MENGGUNAKAN SENSOR MQ-2 BERBASIS MIKROKONTROLER ATMega 328 ]]>
<![CDATA[Tander Risard Lowongan]]>;
<![CDATA[Pratolo Rahardjo]]>;
<![CDATA[Yoga Divayana]]>
<![CDATA[ Jurnal SPEKTRUM Vol 2 No 4 (2015): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (278.261 KB)
<![CDATA[Kebocoran LPG pada rumah tangga menjadi salah satu penyebab terjadinya kebakaran. Untuk menghindari kebakaran akibat kebocoran LPG maka kami merancang bangun perangkat detektor LPG yang dapat mengukur dan menampilkan kadar ppm (part per million) LPG di udara. Detektor LPG ini menggunakan sensor MQ-2 berbasis mikrokontroler ATMega 328. Perangkat detektor ini menghasilkan data berupa nilai ppm (part per million) yang ditampilkan oleh LCD. Detektor ini menggunakan mikrokontroler ATMega 328 sebagai unit pengolah data, sensor MQ-2, buzzer, kipas DC, dan LCD. Proses pengujian alat ini menggunakan tabung LPG, regulator, selang LPG dan box container berukuran 38 cm x 18 cm x 15 cm. Hasil dari perangkat detektor ini berupa tampilan status keadaan LPG, nilai PPM LPG, kipas yang berfungsi sebagai blower untuk mengurangi konsentrasi LPG, dan buzzer untuk memberi peringan kepada pengguna. Perangkat detektor LPG ini diharapkan dapat menghindari kebakaran yang diakibatkan oleh bocornya LPG di masyarakat.]]>
<![CDATA[RANCANG BANGUN ALAT PENDETEKSI KADAR ALKOHOL PADA MINUMAN BERALKOHOL MENGGUNAKAN SENSOR MQ-3 BERBASIS ATmega328 ]]>
<![CDATA[Pande Made Agus Yudi Adnyana]]>;
<![CDATA[I B Alit Swamardika]]>;
<![CDATA[Pratolo Rahardjo]]>
<![CDATA[ Jurnal SPEKTRUM Vol 2 No 3 (2015): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (677.078 KB)
<![CDATA[Alat pendeteksi kadar alkohol adalah alat yang dapat mendeteksi kadar alkohol pada minuman beralkohol dan pada mulut seseorang. Alat ini mendeteksi gas Etanol menggunakan sensor MQ-3. Sensor MQ-3 merupakan sensor analog yang memiliki spesifikasi catu daya 5 volt DC. ATmega328 sebagai pengolah data yang diperoleh dari pembacaan sensor MQ-3 dan ditampilkan pada LCD. Alat ini menampilkan kadar alkohol dan menggolongkan minuman beralkohol sesuai dengan peraturan menteri kesehatan no.86/1977. Hasil dari penelitian ini menunjukkan bahwa alat yang dirancang dapat mendeteksi kadar alkohol pada minuman dengan rata-rata persentase kesalahan sebesar 4.7%. Alat pendeteksi kadar alkohol juga dapat mendeteksi alkohol pada mulut seseorang.]]>
<![CDATA[RANCANG BANGUN KENDALI OTOMATIS LAMPU DAN PENDINGIN RUANGAN PADA RUANG PERKULIAHAN BERBASIS MIKROKONTROLER ARDUINO NANO ]]>
<![CDATA[I Wayan Yoga Widiana]]>;
<![CDATA[I Gusti Agung Putu Raka Agung]]>;
<![CDATA[Pratolo Rahardjo]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 2 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (1028.93 KB)
|
DOI: 10.24843/SPEKTRUM.2019.v06.i02.p16
<![CDATA[Automatic control technology for energy savings is no stranger to social life. Negligence in turning off lights and air conditioners in class is one example of the waste of electricity that occurs in school and campus institutions. By using the PIR (Passive Infra Red) sensor and LDR (Light Dependent Resistor) on the automatic control system of lights and air conditioners, it is expected to reduce excess electricity consumption. All uses of sensors are connected directly to Arduino Nano as the center of automatic system controllers. Software design uses the basic programming language C Arduino and utilizes the timer library function which functions as a room timer. From the results of the research, this tool can already be used as an automation while saving electricity consumption in the use of electronic devices such as lights and air conditioners.]]>
<![CDATA[Prototipe Penggerak Atap Kanopi Otomatis Menggunakan Sensor Cahaya, Sensor Hujan Dan Sensor Suhu Berbasis Mikrokontroler ATMega16 ]]>
<![CDATA[I Made Adi Wijaya]]>;
<![CDATA[I Gusti Agung Putu Raka Agung]]>;
<![CDATA[Pratolo Rahardjo]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 1 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (459.83 KB)
|
DOI: 10.24843/SPEKTRUM.2019.v06.i01.p15
<![CDATA[Small house design, sometimes ignoring comfort factors such as air circulation and direct sunlight that can make humidity increase and higher temperature inside the house. Giving a controll system at the part of the house can make the air circulation better. In this paper, the prototype design of automatic roof canopy drive using a light sensor, rain sensor, and an ATMega16 microcontroller based temperature sensor is used to solve the problem. This prototype uses the programming language in BASCOM AVR software and PROTEUS software for circuit simulation. Light sensor in the form of LDR will detect changes in light intensity, that is when dark produces a voltage of 1.17V and logic 0 and when light produces a voltage of 4.30V and logic 1. Rain sensor is used to detect the presence of water in the event of rain, that is in conditions the rain produces a 1.83V voltage and logic 0, whereas in the absence of rain it produces a voltage of 4.70V and logic 1. The LM35 temperature sensor is used to detect temperature changes that occur, namely when temperatures less than 29ºC will logic 0 and when the temperature is over from 29ºC will logic 1. All conditions generated by the three sensors will be converted through the ADC so that it can provide logic input to the microcontroller to drive the servo motor to close or open the canopy roof.]]>
<![CDATA[RANCANG BANGUN MODUL 3 PRAKTIKUM SISTEM EMBEDDED BERBASIS RASPBERRY PI (PERCOBAAN 3: PENGONTROLAN LAMPU MELALUI APLIKASI ANDROID) ]]>
<![CDATA[Hindro Kusumo Wahid]]>;
<![CDATA[Pratolo Rahardjo]]>;
<![CDATA[Lie Jasa]]>
<![CDATA[ Jurnal SPEKTRUM Vol 8 No 3 (2021): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (544.88 KB)
|
DOI: 10.24843/SPEKTRUM.2021.v08.i03.p11
<![CDATA[The role of university in supporting embedded system development and Internet Of Thingsimplementation seen with Embedded System + Lab Course in Electrical Engineering StudyPorgram, Engineering Faculty, Udayana University. Embedded System + Lab Course is a newcourse, so it’s not available yet learning tools in the terms of supporting the course, then it isnecessary to create Embedded System Practicum Module. Embedded System PracticumModule cosists of 4 kinds of experiment. 1st experiment: monitoring servo motor arm positionchange with PIR sensor in Android application. 2nd experiment: monitoring servo motor armposition change with ultrasonic sensor in Android application. 3rd experiment: controlling andmonitoring light bulb with Android application. 4th experiment: controlling and monitoring lightbulb with Telegram Bot. Given the many results of the discussion of experiments and subexperimentsin module 3, in this article, only experimental data 3 data will be discussed.Experimental data in 3rd module showing the success of tool performance and output datasuitability of monitoring and controlling lamp load status on Python Shell, Firebase and Androidapplication. Can be concluded in this research that the success of making 3rd ModuleEmbedded System Practicum(3rd Experiment : Lamp Controlling Through Android Application)has worked well. The overall experimental data can show the success of parsing JSON data onthe Python Shell platform, Firebase database, Android application.]]>
<![CDATA[RANCANG BANGUN SISTEM KONVERSI UANG LOGAM MENJADI E-MONEY BERBASIS MIKROKONTROLER DAN APLIKASI ANDROID ]]>
<![CDATA[D M Baskara Puruhita Wija]]>;
<![CDATA[I G A P Raka Agung]]>;
<![CDATA[Pratolo Rahardjo]]>
<![CDATA[ Jurnal SPEKTRUM Vol 8 No 1 (2021): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (448.812 KB)
|
DOI: 10.24843/SPEKTRUM.2021.v08.i01.p23
<![CDATA[Money is a medium that is used as a means of buying/selling. Indonesia uses theRupiah currency with 2 types of money used, one of which is coins. Coins are generally used intransactions of small amounts, but in some cases, coins are used in transactions of largeamounts. This caused problems in counting and sorting coins in terms of time and energy.Through this problem, a coin sorting and the counter system was developed that could beconverted into E-Money and integrated with an Android-based smartphone. The system isdesigned with 2 parts, namely hardware and software. The sorting system is created using thedifferent diameters of each coin. The counting system uses IR Sensor to detect coins andcounts on the ESP32. Testing on the system is carried out in 3 stages, namely testing the toolsystem, testing the Android application system, and testing the whole system. The system forconverting coins to e-money is made using the ESP32 as the main microcontroller withBluetooth as a medium of communication with smartphones. The coin sorting board is madeinto 4 strips and has holes the same size as the diameter of the coins. In the coin countingsystem, the tool has been able to count up to 250 coins in 8 minutes 21 seconds with anaccuracy percentage above 80%.]]>
<![CDATA[PROTOTYPE ALAT PENGINGAT PENGGANTIAN OLI PADA SEPEDA MOTOR MEMANFAATKAN SMS BERBASIS MIKROKONTROLER ATMEGA-328 ]]>
<![CDATA[Made Bayu Pranata]]>;
<![CDATA[I Gusti Agung Putu Raka Agung]]>;
<![CDATA[Pratolo Rahardjo]]>
<![CDATA[ Jurnal SPEKTRUM Vol 2 No 4 (2015): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
Show Abstract
|
Download Original
|
Original Source
|
Check in Google Scholar
|
Full PDF (409.7 KB)
<![CDATA[Dewasa ini masyarakat banyak disibukan dalam berbagai rutinitas harian mulai dari pekerjaan kantor, sekolah, rumah tangga dan lainnya. Karena terlalu banyak aktifitas biasanya masyarakat sering melupakan hal-hal kecil salah satunya lupa akan waktu yang tepat untuk melakukan perawatan sepeda motor khususnya dalam penggantian oli. Dari permasalahan tersebut maka munculah ide untuk membuat prototype alat pengingat penggantian oli pada sepeda motor memanfaatkan SMS berbasis mikrokontroler ATmega-328. Pada perangkat mekanik prototype terdapat komponen rotary encoder dan sensor kecepatan yang diletakkan pada velg. Jarak yang sudah ditempuh dan kecepatan putaran roda didapat dari putaran velg. Program delay timer akan menghitung waktu penggantian oli. Pada alat ini terdapat fitur pengiriman SMS terus-menerus serta buzzer terus berbunyi jika pengendara melebihi batas kecepatan. Alat ini bertujuan untuk mengingatkan pengendara sepeda motor dengan mengirimkan SMS tentang waktu yang tepat dalam melakukan penggantian oli serta peringatan jika melebihi batas kecepatan maksimal.]]>
