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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Sistemasi: Jurnal Sistem Informasi Jurnal Pengabdian UntukMu NegeRI Journal of Electrical Technology KOMPUTEK Unri Conference Series: Community Engagement Jurnal Riset Teknologi Pencegahan Pencemaran Industri Algor Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) SAINSTEK BATOBO: Jurnal Pengabdian Kepada Masyarakat
Suwitno Suwitno, Suwitno
Jenderal Soedirman University
Religion Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Implementing QR Codes on Student ID for Transactions: TAM Testing Approach Noviany, Caroline; Daniawan, Benny; Suwitno, Suwitno
Sistemasi: Jurnal Sistem Informasi Vol 13, No 3 (2024): Sistemasi: Jurnal Sistem Informasi
Publisher : Program Studi Sistem Informasi Fakultas Teknik dan Ilmu Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v13i3.3922

Abstract

The rapid advancement of technology has had a significant impact on contemporary life. One of the technologies commonly encountered is the Quick Response Code (QR-Code) and Barcode, both of which serve a similar function, that is, to store information represented in the form of squares and lines. Three squares at the corners of the QR-Code are key to ensuring accurate scanning. Universities are educational institutions that provide Student ID Cards as a means of student identification. This research aims to design a transaction system by utilizing QR-Code technology on Student ID Cards for parking and library transactions, as well as creating a transaction system using digitized Student ID Cards. This study employs the Technology Acceptance Model (TAM) testing method to measure the factors influencing users in utilizing the application. The system design successfully incorporates QR-Codes and can be used as a transaction tool. The TAM testing results from 75 respondents regarding system acceptance conclude that the Perceived Ease of Use (PEOU) variable will influence the Perceived Usefulness (PU) variable by 67.4% and affect the Behavioral Toward Using (BITU) variable by 55.1%.
Optimization of Injection Pressure and Fuel Temperature in a Diesel Engine Using Biodiesel B40 Romy, Romy; Suwitno, Suwitno; Ginting, Yogie Rinaldi; Sembiring, Ferdinandus Extranta
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 15 No. 1 (2024): May
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2024.v15.no1.p1-9

Abstract

Biodiesel is an alternative fuel substitute for diesel engines produced from vegetable or animal oil through the transesterification reaction process between fatty acid, methanol, and catalyst. However, in its use in diesel engines, there is a decrease in engine performance. This is partly due to the higher viscosity value compared to diesel. Some ways to improve engine performance using biodiesel include adjusting injection pressure and increasing fuel inlet temperature. This study aimed to determine the effect of adding injection pressure and fuel inlet temperature on the performance of diesel engines using B40, such as power, thermal efficiency, sfc, and AFR. This study used a 1-cylinder diesel engine with constant rotation, using five variations of injection pressure 110-150 bar with a 10 bar interval, and five variations of fuel inlet temperature 30˚C-70˚C with a 10˚C intervals, and five loads from 5,000 kg/m2 to 25,000 kg/m2 with a 5000 kg/m2 interval. Testing and data processing were done using the Taguchi method. The results showed that the best diesel engine performance occurred at an injection pressure of 150 bar and a fuel temperature of 60˚C. The predicted performance value achieved under optimal conditions is a power of 2.9 kW at a load of 25000 kg/m2, thermal efficiency of 69.92% at a load of 25000 kg/m2, sfc of 3 x10-5 kg/kJ at a load of 25000 kg/m2, and AFR of 169.23 at a load of 5000 kg/m2. Temperature significantly affects engine performance power, sfc, thermal efficiency, and AFR compared to injection pressure.
ANALISIS DAN PERANCANGAN SISTEM INFORMASI PENJUALAN (E-COMMERCE) BERBASIS WEB DENGAN MENGGUNAKAN FRAMEWORK LARAVEL (STUDI KASUS PADA PT. GLUCKSINDO MAKMUR) Fraderic, Daniel Ivan; Suwitno, Suwitno
ALGOR Vol. 4 No. 2 (2023): Updated Technology
Publisher : Fakultas Sains dan Teknologi-Universitas Buddhi Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31253/algor.v4i2.1497

Abstract

Electronic commerce or commonly known as e-commerce is a trading activity carried out by sellers and buyers to offer or buy goods or services electronically using electronic payments. With e-commerce, it will certainly facilitate transactions because sellers and buyers do not need to meet in person, and the prices offered are cheaper because sellers do not need to pay rent. With the ease of this transaction, it certainly adds to the competition in the business because the target market is wider. Competition in business is an unavoidable part, now competition in business is getting tougher in various aspects both in terms of production, service and marketing. Many companies want to develop and their products are known by the public and potential buyers, including PT. Glucksindo Makmur, which until now is still using the offline marketing system, namely sales looking for customers from one place to another to offer products. So that an electronic-based sales system is needed. The software used to design this application are PHP, MySQL, and Laravel Framework. The method used in this test is UAT. The results of this study are the presence of an E-Commerce system that can assist customers in placing orders online, knowing information on the type of product they want to buy and a clear and complete company profile. This research has succeeded in implementing the Laravel framework in designing web-based E-Commerce.
ANALISIS DAN PERANCANGAN SISTEM INVENTORY BERBASIS WEB PADA PT. LINKNET Tbk Luter Manurung, Josua; Suwitno, Suwitno; Gunawan, Alexius Hendra; Damayanti, Lily
ALGOR Vol. 5 No. 1 (2023): Sustainability of Information Technology
Publisher : Fakultas Sains dan Teknologi-Universitas Buddhi Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31253/algor.v5i1.2355

Abstract

Zaman Yang dimana serba teknologi ini, dimana teknologi sebuah kebutuhan yang sangat penting dan tidak dapat dipisahkan dari kehidupan manusia. khususnya Stok atau yang biasa disebut Inventory pada suatu perusahaan juga sangat saling bekerjasama erat menggunakan aktivitas dalam mengumpulkan data mengenai kegiatan pada aktivitas proses keluar dan masuknya pada setiap bisnis perusahaan. Lantaran Persedian sangat berpengaruh dan krusial bagi kebutuhan bisnsis perusahaan, Pt. Link Net adalah perusahaan yang bergerak bidang tv kabel dan jaringan. oleh karena itu sistem ini dapat berguna dalam melakukan transaksi keluar masuk barang pada perusahaan. Metode penelitian ini adalah dengan menggunakan metode Black Box Testing yaitu pengujian yang dilakukan oleh user untuk memastikan bahwa sistem yang dibuat sudah sesuai dengan harapan user atau pengguna.permasalahan yang ada di PT. Link Net yaitu dalam melakukan transaksi keluar masuk barang pada gudang masih menggunakan pencatatan buku besar dan excel. maka penulis ingin merancang suatu sistem inventory berbasis web dan dapat diaskses oleh pengguna dimanapun dan kapanpun untuk membantu dalam transaksi keluar masuk barang dan kestabilan stock barang pada Gudang PT. Link Net
Desain Dan Implementasi Inverter Satu Fasa Berbasis Teknologi Mikrokontroler Arduino Uno Suwitno, Suwitno; Aziz, M.; Ali, Nurhalim Dani; Rosma, Iswadi Hasyim; Firdaus, Firdaus; Marpaung, Noveri Lysbetti
JET (Journal of Electrical Technology) Vol 10, No 3 (2025): Edisi Oktober
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/jet.v10i3.13158

Abstract

Penelitian ini membahas desain dan implementasi inverter satu fasa berbasis mikrokontroler Arduino dengan teknik modulasi gelombang persegi. Sistem inverter dirancang untuk mengonversi sumber tegangan DC menjadi tegangan AC satu fasa dengan frekuensi 50 Hz. Arduino digunakan sebagai pembangkit sinyal kendali, sedangkan IC IR2110 berfungsi sebagai driver untuk menghubungkan sinyal logika mikro kontroler dengan piranti switching MOSFET pada rangkaian inverter. Untuk meningkatkan kualitas tegangan keluaran, diterapkan rangkaian filter kapasitor pada sisi sekunder transformator guna mereduksi komponen harmonisa yang dihasilkan oleh modulasi gelombang persegi. Pengujian dilakukan dengan variasi beban resistif berupa lampu pijar 15 W, 25 W, dan 40 W untuk mengevaluasi kestabilan tegangan dan bentuk gelombang keluaran inverter. Hasil pengujian menunjukkan bahwa setelah pemasangan kapasitor filter, bentuk gelombang keluaran inverter mendekati sinusoidal dengan tingkat distorsi yang lebih rendah. Tegangan keluaran terukur tanpa beban sebesar 219,8 V dengan frekuensi 50 Hz, sesuai dengan standar system listrik AC. Meskipun terjadi penurunan tegangan saat beban 40W 3,1% seiring peningkatan beban, inverter tetap mampu mempertahankan kinerja yang stabil tanpa distorsi gelombang yang signifikan. Hasil penelitian ini menunjukkan bahwa inverter satu fasa berbasis Arduino dengan modulasi gelombang persegi dan penambahan filter kapasitor dapat digunakan secara efektif untuk aplikasi daya rendah.
Co-Authors Agus Ika Putra Ahmad Jamaan Ali, Nurhalim Dani Ali, Nurhalim Dani Ali Amir Hamzah Anak Agung Istri Sri Wiadnyani Anhar Anhar Anisa Yulvi Azni Antonius Rajagukguk, Antonius Ari Sandhyavitri Aziz, M. Budhi Anto Budiman, Marcel Adi Damayanti, Lily Daniawan, Benny Dian Yayan Sukma, Dian Yayan Edi Susilo Edy Ervianto Ery Safrianti Firdaus Firdaus Fraderic, Daniel Ivan Fri Murdiya, Fri Ginting, Yogie Rinaldi Gukguk, Antonius Raja Gunawan, Alexius Hendra Hamdani, Eddy Hutabalian, Ronaldi Hutabarat, Bijujent IRSAN TAUFIK ALI Julianto, Ryan Junaidi Junaidi Karamallah, Rizky Kuliz, Muhammad Fakhri Al Laksono Trisnantoro Linna Oktaviana Sari Luter Manurung, Josua Noveri Lysbetti M Noviany, Caroline Nurhalim Nurhalim, Nurhalim R.A Rizka Qori Yuliani Putri Rahyul Amri Ramadhan, Muhammad Zahrul Faizi Romy Romy Rosma, Iswadi Hasyim Sandi, Rio Aditya Febri Sembiring, Ferdinandus Extranta Tampubolon, Ari Taufiq, M Wahono, Ambrosius Wijaya, Michelle Lanetha Winanda, Muhammad Valdi Yoel, Yoel Marcelino Pribadi Yusnita Rahayu