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The Use of Instrumentation Amplifiers and Voltage-to-Current Converter In a Process Control : Simulation and Implementation Wardhana, Arief Wisnu; Zulfa, Mulki Indana
JURNAL NASIONAL TEKNIK ELEKTRO Vol 8, No 3: November 2019
Publisher : Jurusan Teknik Elektro Universitas Andalas

Signal in the form of voltage are often need to be transmitted when we deal with measurement. However, voltage signal transmission creates many problems. The series resistance that appears between the output of the signal conditioner and the load produces some voltage drop. Even a few millivolts of the voltage drops could significantly alter the percentage error of the measurement. Current signal is the same everywhere in a series loop. So, by converting the signal into a current and then sending the current signal will assures that the load will receive all of the signal we sent. In this paper, a simulation and an implementation of using instrumentation amplifiers and V-I converter for sending a voltage signal has been conducted. The process variable being measured is a differential pressure that is sensed by a pressure sensor. The output voltage signal was then amplified by an instrumentation amplifier and fed to a V-I converter for transmission purpose. The results is an increase in output current when the presssure was increased. It can be concluded that the instrumentation amplifier and V-I converter are the devices that are properly used for a voltage signal transmission.Â Â Keywords : Instrumentation amplifiers, signal transmission, V-I converter, voltage signal, current signal, pressure sensors.

Pengontrolan Motor Stepper Menggunakan Driver DRV 8825 Berbasis Signal Square Wave dari Timer Mikrokontroler AVR Wardhana, Arief Wisnu; Nugroho, Daru Tri
JURNAL NASIONAL TEKNIK ELEKTRO Vol 7, No 1: March 2018
Publisher : Jurusan Teknik Elektro Universitas Andalas

In this research, an electronic circuit system was designed for controlling stepper motors. A stepper motor driver IC was used to implement those control mechanism. A Microcontroller Unit (MCU) is used to generate the square-wave needed for input to motor driver. The circuit was used on two types of stepper motors, namely permanent magnet stepper motor and hybrid stepper motor. Several modes of controls are conducted here, which are full-stepping, half-stepping, and microstepping. Some useful motor movements which are often used in many applications were tried here. Observations were made on the speed of the motor for various input waveform frequencies, on the stepper motor sound for a range of microstepping level, and on the acceleration profile. Some significant results were obtained in that by using higher microstepping levels, a smoother stepper motor movement can be achieved. Another important result is that by applying an acceleration profile in the microcontroller program, we may target a speed which is well above the rated start-on speed of the stepper motor.Keywords : stepper motor, microcontroller unit, stepper motor driver integrated circuit, full-stepping, half-stepping, microsteppingÂ AbstrakPada penelitian ini dirancang suatu rangkaian elektronik untuk mengendalikan motor stepper. Suatu IC kontroler digunakan sebagai piranti kontrolnya. Microcontroller Unit (MCU) digunakan untuk menghasilkan sinyal input. Rangkaian ini dicobakan pada dua jenis motor yaitu motor stepper Permanent Magnet dan motor stepper Hybrid. Berbagai mode stepping dilakukan pada penelitian ini, yaitu full-stepping, half-stepping dan microstepping. Beberapa profil pergerakan motor stepper yang biasa digunakan pada berbagai aplikasi juga dicobakan. Parameter pergerakan motor diamati, seperti besarnya kecepatan motor, seberapa halus suara motor yang dihasilkan, serta profil percepatannya. Hasil yang diperoleh adalah bahwa dengan menggunakan level microstepping yang lebih tinggi menyebabkan suara motor stepper menjadi lebih tidak terdengar. Hasil selanjutnya didapat bahwa dengan mengaplikasikan suatu profil percepatan di dalam program mikrokontroler, maka bisa ditargetkan suatu kecepatan motor stepper yang diperkirakan melebihi kecepatan start-on yang di support oleh motor stepper tersebut.Kata Kunci : stepper motor, microcontroller unit, integrated circuit, microstepping, Permanent Magnet, Hybrid Â

Pengontrolan Motor Stepper Menggunakan Driver DRV 8825 Berbasis Signal Square Wave dari Timer Mikrokontroler AVR Arief Wisnu Wardhana; Daru Tri Nugroho
JURNAL NASIONAL TEKNIK ELEKTRO Vol 7, No 1: March 2018
Publisher : Jurusan Teknik Elektro Universitas Andalas

In this research, an electronic circuit system was designed for controlling stepper motors. A stepper motor driver IC was used to implement those control mechanism. A Microcontroller Unit (MCU) is used to generate the square-wave needed for input to motor driver. The circuit was used on two types of stepper motors, namely permanent magnet stepper motor and hybrid stepper motor. Several modes of controls are conducted here, which are full-stepping, half-stepping, and microstepping. Some useful motor movements which are often used in many applications were tried here. Observations were made on the speed of the motor for various input waveform frequencies, on the stepper motor sound for a range of microstepping level, and on the acceleration profile. Some significant results were obtained in that by using higher microstepping levels, a smoother stepper motor movement can be achieved. Another important result is that by applying an acceleration profile in the microcontroller program, we may target a speed which is well above the rated start-on speed of the stepper motor.Keywords : stepper motor, microcontroller unit, stepper motor driver integrated circuit, full-stepping, half-stepping, microstepping AbstrakPada penelitian ini dirancang suatu rangkaian elektronik untuk mengendalikan motor stepper. Suatu IC kontroler digunakan sebagai piranti kontrolnya. Microcontroller Unit (MCU) digunakan untuk menghasilkan sinyal input. Rangkaian ini dicobakan pada dua jenis motor yaitu motor stepper Permanent Magnet dan motor stepper Hybrid. Berbagai mode stepping dilakukan pada penelitian ini, yaitu full-stepping, half-stepping dan microstepping. Beberapa profil pergerakan motor stepper yang biasa digunakan pada berbagai aplikasi juga dicobakan. Parameter pergerakan motor diamati, seperti besarnya kecepatan motor, seberapa halus suara motor yang dihasilkan, serta profil percepatannya. Hasil yang diperoleh adalah bahwa dengan menggunakan level microstepping yang lebih tinggi menyebabkan suara motor stepper menjadi lebih tidak terdengar. Hasil selanjutnya didapat bahwa dengan mengaplikasikan suatu profil percepatan di dalam program mikrokontroler, maka bisa ditargetkan suatu kecepatan motor stepper yang diperkirakan melebihi kecepatan start-on yang di support oleh motor stepper tersebut.Kata Kunci : stepper motor, microcontroller unit, integrated circuit, microstepping, Permanent Magnet, Hybrid

The Use of Instrumentation Amplifiers and Voltage-to-Current Converter In a Process Control : Simulation and Implementation Arief Wisnu Wardhana; Mulki Indana Zulfa
JURNAL NASIONAL TEKNIK ELEKTRO Vol 8, No 3: November 2019
Publisher : Jurusan Teknik Elektro Universitas Andalas

Signal in the form of voltage are often need to be transmitted when we deal with measurement. However, voltage signal transmission creates many problems. The series resistance that appears between the output of the signal conditioner and the load produces some voltage drop. Even a few millivolts of the voltage drops could significantly alter the percentage error of the measurement. Current signal is the same everywhere in a series loop. So, by converting the signal into a current and then sending the current signal will assures that the load will receive all of the signal we sent. In this paper, a simulation and an implementation of using instrumentation amplifiers and V-I converter for sending a voltage signal has been conducted. The process variable being measured is a differential pressure that is sensed by a pressure sensor. The output voltage signal was then amplified by an instrumentation amplifier and fed to a V-I converter for transmission purpose. The results is an increase in output current when the presssure was increased. It can be concluded that the instrumentation amplifier and V-I converter are the devices that are properly used for a voltage signal transmission. Keywords : Instrumentation amplifiers, signal transmission, V-I converter, voltage signal, current signal, pressure sensors.

Strategi caching aplikasi berbasis in-memory menggunakan Redis server untuk mempercepat akses data relasional Mulki Indana Zulfa; Ari Fadli; Arief Wisnu Wardhana
Jurnal Teknologi dan Sistem Komputer Volume 8, Issue 2, Year 2020 (April 2020)
Publisher : Department of Computer Engineering, Engineering Faculty, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jtsiskom.8.2.2020.157-163

Utilization of an in-memory database as a cache can overcome relational database latency problems in a web application, especially when using a lot of join queries. This study aims to model the academic relational data into Redis compatible data and analyze the performance of join queries usage to accelerate access to relational data managed by RDBMS. This study used academic data to calculate student GPA that is modeled in the RDBMS and Redis in-memory database (IMDB). The use of Redis as an in-memory database can significantly increase Mysql database system performance up to 3.3 times faster to display student data using join query and to shorten the time needed to display GPA data to 52 microseconds from 61 milliseconds.

DESIGN AND SIMULATION OF BUILDING BLOCKS OF A LOW-DROPOUT VOLTAGE REGULATOR Arief Wisnu Wardhana; Azis Wisnu Widhi Nugraha; Eko Atmojo; Ari Fadli
Transmisi: Jurnal Ilmiah Teknik Elektro Vol 24, No 1 Januari (2022): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/transmisi.24.1.9-22

Regulator Low Dropout (LDO) adalah sebuah cara yang sederhana dan murah untuk mengatur sebuah tegangan keluaran yang diberi daya dari suatu masukan yang lebih tinggi tegangan nya. Regulator LDO adalah sebuah pengatur tegangan DC linear yang bisa meregulasi besarnya tegangan keluaran bahkan ketika tegangan suplai nya berubah turun menjadi sangat mendekati tegangan keluaran tersebut. Pada artikel penelitian ini, dijelaskan secara detail tentang cara untuk mendesain setiap blok penyusun suatu regulator tegangan drop-out rendah berbasis CMOS. Semua blok penyusun kemudian digabung untuk membentuk piranti LDO tersebut. Hasil desain kemudian disimulasikan menggunakan Multisim LIVE, yang merupakan sebuah simulator rangkaian online. Berbasis pada hasil simulasi, beberapa spesifikasi dari LDO yang sudah didesain kemudian diberikan. Spesifikasi tersebut diantara nya adalah besarnya tegangan dropout LDO, arus quiescent, besarnya regulasi beban, dan besarnya regulasi line. Kata kunci: regulator tegangan, tegangan dropout, arus quiescent, regulasi beban, regulasi line Low dropout regulators (LDOs) are a simple and inexpensive way to regulate an output voltage that is powered from a higher voltage input. An LDO regulator is a DC linear voltage regulator that can regulate the magnitude of the output voltage even when the supply voltage is very close to the output voltage. In this research paper, various building blocks of a CMOS-based low-dropout voltage regulator were designed and simulated using Multisim LIVE, an online circuit simulator. All of the building blocks were then combined to form the device. Based on the results of the simulation, several spesifications of the LDO were determined. Those are the LDO’s dropout voltage, its quiescent current, its load regulation, and its line regulation. Keywords: voltage regulator, dropout voltage, quiescent current, load regulation, line regulation

Utilization of Solar Street Lights as Lighting Facilities in Tourist Places: Pemanfaatan Lampu Penerangan Jalan Umum Bertenaga Surya Sebagai Sarana Penerangan di Tempat Wisata Ari Fadli; Daru Tri Nugroho; Arief Wisnu Wardhana; Gito Sugiyanto; Hari Prasetijo; Widhiatmoko Herry Purnomo
Mattawang: Jurnal Pengabdian Masyarakat Vol. 3 No. 1 (2022)
Publisher : Yayasan Ahmar Cendekia Indonesia

Hutan Pinus Limpakuwuswhich is located on the southern slope of Mount Slamet is located at an altitude of about 750 meters above sea level (MDPL). The Limpakuwus Pine Forest has limited access to electricity from the PLN network, so there are still many locations at night or cloudy skies, so these locations have limited access, this causes the manager to use generators to turn on the lights in order to provide the electricity needed for electricity. provide information on the location in the Limakuwus Pine Forest tourist spot. The interview and survey method started this service activity, the interview aimed to determine the need for the number of spots (spots), to get lighting and a survey to determine the location of the lamp installation. equipment, and manufacture of solar powered PJU light poles and their installation. The results of these activities include increasing knowledge, skills of residents in the field of fabrication and installation of solar-powered PJU lamps with the installation of 2100Lm 20 Watt LED lights, 5V/40Watt Solar Panels and 3.2V/32 Ah batteries at predetermined locations, as well as increased ease of use. running activities at night at that location. Abstrak Hutan Pinus Limpakuwus yang berada di lereng selatan Gunung Slamet itu berada pada ketinggian sekitar 750 meter di atas permukaan laut (MDPL). Hutan Pinus Limpakuwus memiliki akses listrik terbatas dari jaringan PLN, sehingga masih banyaknya lokasi yang malam hari atau kondisi langit mendung, maka lokasi tersebut memiliki akses yang terbatas hal ini menyebabkan pihak pengelola menggunakan genset guna menghidupkan lampu dalam rangka menyediakan sarana kebutuhan listrik yang digunakan untuk memberikan penerangan pada lokasi di tempat wisata Hutan Pinus Limakuwus tersebut. Metode wawancara dan survey mengawali kegiatan pengabdian ini, wawancara bertujuan untuk menentukan kebutuhan jumlah titik (spot), untuk mendapat penerangan dan survey guna menentukan lokasi pemasangan lampu Metode pelaksanaan kegiatan meliputi: survey lokasi, identifikasi dan solusi masalah, perencanaan kegiatan, perhitungan kebutuhan bahan dan peralatan, dan pembuatan tiang lampu PJU bertenaga surya dan pemasangannya. Hasil kegiatan antara lain peningkatan pengetahuan, ketrampilan warga di bidang fabrikasi dan instalasi lampu PJU bertenaga surya dengan terpasangnya lampu LED 2100Lm 20 Watt, Solar Panel 5V/40Watt dan battery 3.2V/32 Ah pada lokasi yang telah di tentukan sebelumnya, serta peningkatan kemudahan dalam menjalankan aktivitas dimalam hari pada lokasi tersebut.

Design and Simulation of a Multistages Common-Emitter, Common-Collector, AC Voltage Amplifier Arief Wisnu Wardhana; Yogi Ramadhani; Priswanto Priswanto
JURNAL NASIONAL TEKNIK ELEKTRO Vol 11, No 2: July2022
Publisher : Jurusan Teknik Elektro Universitas Andalas

The main function of the ampifier is to increase the signal strength, in terms of its voltage or current. In this research, a multistages ac voltage common-emitter amplifer and common-collector amplifier with a single supply of +15 V was designed. The objective is to design an amplifier for amplifying a small ac signal from a transducer. The transducer has an output impedance of 10 k. The amplifier will have a small-signal gain in order of about 1500 and a small-signal bandwith ranging from 100 Hz to 20 kHz. It will drive a load of 300 Ω. The entire circuit consists of a first stage common-emitter configuration gain amplifier, another second stage common-emitter configuration gain amplifier, and a third stage buffer unity gain common collector amplifier. The three-stages was capacitor coupled. The overall gain of the entire amplifier is the product of the first-stage gain, the second-stage gain, and the third-stage gain. A method called short-circuit time constants was used to determine the apropriate coupling and bypass capacitors. The overall circuit was then simulated by using NI Multisim. The magnitude of the overall gain of the circuit was obtained by performing an interactive analysis and simulation. The frequency response of the amplifier was obtained by performing an AC sweep analyses and simulation. It can be showed that the amplifier’s overall gain obtained from simulation is in agreement with the calculated results. The simulated result for the frequency responses were also in agreement with the requirement

Analisis Perbandingan Metode Certainty Factor, Dempster Shafer dan Teorema Bayes dalam Deteksi Dini Gangguan Kesehatan Mental Novanka Veldasari; Ari Fadli; Arief Wisnu Wardhana; Muhammad Syaiful Aliim
Jurnal Pendidikan dan Teknologi Indonesia Vol 2 No 7 (2022): JPTI - Juli 2022
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpti.191

Kesehatan adalah hal yang sangat penting, karena tanpa kesehatan yang cukup, maka setiap individu akan sulit dalam melaksanakan aktivitasnya kesehariannya, baik berupa kesehatan fisik maupun mental. Dewasa ini, kesehatan mental masih menjadi hal yang sering diabaikan oleh sebagian masyarakat. Padahal gangguan kesehatan mental ini dapat menyebabkan komplikasi serius, baik pada fisik, emosi, maupun perilaku. Penelitian ini bertujuan untuk melakukan diagnosis awal terhadap gangguan kesehatan mental, sehingga dapat diminimalisir dampak yang dapat ditimbulkannya. Diagnosis awal yang dihasilkan merupakan hasil analisis berdasarkan gejala yang ditimbulkan dengan menggunakan tiga buah metode yaitu Certainty Factor, Dempster-Shafer, dan Teorema Bayes. Ketiga metode ini melakukan analisis masing-masing dengan cara mengukur tingkat keyakinan pakar dengan nilai probabilitas berdasarkan gejala yang ada. untuk dapat mengukur nilai kemungkinan seseorang menderita gangguan Kesehatan Mental, sehingga dapat mengetahui metode mana yang paling tepat digunakan. Berdasarkan hasil analisis tersebut penelitian ini menunjukan bahwa metode Certainty Factor memiliki nilai probabilitas sebesar 99,4%, metode Dempster-Shafer dengan nilai probabilitas sebesar 94% dan Teorema Bayes dengan nilai probabilitas sebesar 81.65%. Sehingga metode Certainty Factor merupakan metode yang paling tepat digunakan untuk melakukan diagnosasi penyakit ini. Pada pengujian Usability yang dilakukan website Sistem Pakar hasil implementasi ketiga metode ini diperoleh hasil sebesar 80.68%, sehingga juga dapat disimpulkan bahwa hasil pengguna cukup puas dengan sistem pakar tersebut.

Rancang Bangun Sistem Rak Penetas Telur Otomatis Menggunakan Real Time Clock Berbasis Mikrokontroler Arduinio Mega 2560 Danar Zidni Ilman; Arief Wisnu Wardhana; Daru Tri Nugroho
Dinamika Rekayasa Vol 19, No 1 (2023): Jurnal Ilmiah Dinamika Rekayasa - Februari 2023
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2023.19.1.580

Penetasan telur adalah upaya hewan ovipar (termasuk didalamnya adalah ayam) dalam mempertahankan populasinya, yaitu dengan cara bertelur. Pada prosesnya penetasan bisa dilakukan dengan cara alami ataupun buatan dengan bantuan mesin penetasan telur. Prinsip kerja mesin penetas telur adalah tiruan dari keadaan alami proses pengeraman indukan terhadap telurnya. Maka dari itu alat penetas telur menyediakan berbadai kondisi layaknya pengeraman alami. Kondisi yang perlu diperhatikan salah satunya adalah pemutaran telur (Egg Turning) yang bertujuan agar embrio dalam telur dapat berkembang dengan semestinya hingga telur dapat menetas. Pemutaran telur dilakukan secara berkala pada frekuensi waktu tertentu. Untuk memudahkan pengoprasian mesin penetas diperlukan rancangan rak penetas otomatis. Tipe rak ayun digunakan karena metode ini yang umum digunakan pada mesin penetas skala industri. Untuk pergerakan rak ayun ini menggunakan aktuator linier elektrik yang dalam kerjanya memerlukan driver motor agar gerakan bisa bolak-balik. Pemicu driver motor menggunakan mikrokontroler arduino mega 2560 dengan input perwaktuan RTC 3231. Untuk memudahkan pengoperasian mesin penetas diperlukan rancangan rak penetas otomatis. Dalam peracangan tipe rak ayun menjadi pilihan karena metode ini umum digunakan pada mesin penetas skala industri. Untuk pergerakan rak ayun ini menggunakan aktuator linier elektrik yang dalam kerjanya memerlukan driver motor agar terdapat gerakan bolak-balik. Pemicu driver motor menggunakan mikrokontroler arduino mega 2560 dengan input perwaktuan RTC 3231.Terdapat 3 fitur otomatis yaitu diantaranya jeda sebagai interval waktu pergerakan rak, DayOn sebagai hari mulainya pemutaran telur, dan DayOff sebagai hari terakhir pemutaran telur.

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