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All Journal Jurnal Ilmu Komputer Journal of Mathematical and Fundamental Sciences
I Ketut Putra
Universitas Udayana
Astronomy Chemistry Computer Science & IT Earth & Planetary Sciences Languange, Linguistic, Communication & Media Library & Information Science Mathematics Physics

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PERANCANGAN DAN PEMBUATAN LUX METER DIGITAL BERBASIS SENSOR CAHAYA EL7900 I Made Satriya Wibawa; I Ketut Putra
Jurnal Ilmu Komputer Vol 11 No 1 (2018): Jurnal Ilmu Komputer
Publisher : Informatics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1347.11 KB) | DOI: 10.24843/jik.2018.v11.i01.p06

Abstract

Akan dibuat prototype alat lux meter digital berbasis sensor cahaya EL7900. Dengan menggunakan mikrokontroller R8C/13 sebagai unit proses dan tampilan hasil proses pada LCD. Unjuk kerja alat telah menunjukkan bahwa ada hubungan linier antara kebenaran tegangan output sensor dengan intensitas yang di tampilkan pada LCD. Kebenaran alat ini telah di kalibrasi dengan alat lux meter standar Hioki 3422 dan data menunjukkan bahwa intensitas yang di hasilkan oleh lux meter digital EL7900 berada pada range standar deviasi intensitas lux meter standar dengan kesalahan rata - rata sebesar 0,49 %. Serta sensitivitas sensor EL7900 terletak pada daerah warna kuning.
PERANCANGAN DAN PEMBUATAN SISTEM KONTROL LAMPU DENGAN SMS (SHORT MESSAGE SERVICE) I Made Satriya Wibawa; I Ketut Putra
Jurnal Ilmu Komputer Vol 9 No 2: September 2016
Publisher : Informatics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.488 KB)

Abstract

Telah dibuat sebuah sistem kontrol lampu dengan SMS (Short Message Service)berbasis komputer. Sistem ini menggunakan ponsel Siemens C35i sebagai modem untukpenerimaan SMS yang terhubung dengan komputer melalui port serial. SMS yang diterimadiolah oleh program kontrol lampu yang dibuat dengan memanfaatkan software Borland Delphi7.0. Program kontrol lampu akan mengaktifkan pin-pin data pada port paralel komputer, yangsemula tidak ada tegangan keluaran, setelah diaktifkan akan menghasilkan tegangan keluaransebesar 5 Volt untuk menjalankan rangkaian pengontrol lampu. Sistem ini mempunyai tiga carapengontrolan yaitu dengan SMS, dengan timer dan secara manual. Kontrol lampu ini bisadikontrol kapan saja tidak terbatas waktu dan dari mana saja tidak terbatas tempat asalkantempat tersebut masih dalam jangkauan jaringan komunikasi.
Study on Transport Properties of Chitosan Membrane in Different Types of Electrolytes Ni Nyoman Rupiasih; Made Sumadiyasa; I Ketut Putra; Ni Made Rasmini
Journal of Mathematical and Fundamental Sciences Vol. 50 No. 2 (2018)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2018.50.2.6

Abstract

In this study, the electrical properties of chitosan membrane in different types of electrolytes were investigated by analyzing the current-voltage (I"‘V) curve. The membrane used was chitosan membrane 2%. The different electrolyte solutions used were KCl, HCl, MgCl2, CaCl2 and AlCl3 at concentrations of 0.025 M. The I-V experiments were done using a two-compartment cell, which contained two working electrodes made of platinum connected to a DC current source and two Ag/AgCl reference electrodes connected to a voltmeter. All experiments were conducted at an ambient temperature of 28.7 °C. Water uptake (hydrophilicity) and Fourier transform infrared (FTIR) measurements were also studied in this research. The I-V curves show the ohmic behavior of the membrane. The resistance of the membrane was higher in the electrolyte solutions with larger Stokes radii and lower in the electrolyte solutions with larger diffusion coefficients, except in the HCl solution. These results indicate that the I-V curve shapes are affected by the type of electrolyte solution used for the chitosan membrane transport. The hydrophilicity of the membrane was improved after exposure to the electrolyte solutions. The FTIR analysis revealed a new peak at about 677 cm-1, which indicates the formation of C-Cl groups in the used membranes.
Co-Authors Bayun Kurniawan Bhakti Hardian Yusuf Gusnul H Yakin I Ketut Sukrasa Komang Ngurah Suarbawa Made Sumadiyasa Ni Kadek Sugestiani Ni Made Rasmini Ni Nyoman Rupiasih Ryan Juliston Pangihutan Simanjuntak Satriya Wibawa, I Made Sukarasa, I Ketut