Sihono Sihono
Center for Application of Isotope and Radiation Technology, National Nuclear Energy Agency Jl. Lebak Bulus Raya, Pasar Jumat, Jakarta, Indonesia

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RANCANG BANGUN KENDALI ON/OFF LAMPU PENERANGAN DENGAN TEKNOLOGI WIRELESS ZIGBEE SEBAGAI PENUNJANGPRATIKUM MIKROKONTROLER Sihono, Sihono
Orbith Vol 12, No 2 (2016): Juli 2016
Publisher : Orbith

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Abstract

Penerangan ruang merupakan kebutuhan utama yang sangat diperlukan pada setiap  tempat atau ruang baik untuk rumah tangga, perkantoran, tempat-tempat usaha, industri dan tempat- tempat lain. Pada penelitian ini akan dilakukan pembuatan alat kendali lampu penerangan ruang jarak jauh menggunakan teknologi nirkabel dengan protokol Zigbee, sehingga kendali lampu penerangan menjadi lebih mudahdan nyaman.Pembuatan alat kendali lampu nirkabel terdiri dari dua unit yaitu unit kendali yang terdapat saklar kendali ON/OFF lampu dan Unit beban yang berfungsi menterjemahkan informasi data digital menjadi keluaran nyala/padam lampu penerangan. Pada penelitian ini digunakan mikrokontroler AVRATMega 328 sebagai pusat kendali dan modul Zigbee DRF 1604 sebagai penghubung komunikasi data antara unit kendali dan unit beban. Hasil penelitian menunjukan bahwa data digital dapat dikirimkan melalui modul Zigbee sehingga perintah dari unit kendali dapat digunakan untuk memberi perintah nyala atau padam pada lampu penerangan. Pada penelitian ini juga dibuat program untuk merealisasikankendali lampu menggunakan bahasa C menggunakan program IDE Codevision yang merupakan bahasa pemrograman mikrokontroler yang banyak digunakan saat ini.
Alat Peraga Kendali Pemanas Udara Berbasis Arduino Uno Sebagai Penunjang Praktikum Laboratorium Kendali Politeknik Negeri Semarang [A Demonstration Tool of Arduino Based Air Heater Controller to Support Control Laboratory of Politeknik Negeri Semarang] Supriyo, Bambang; Kuntardjo, Samuel Beta; Sihono, Sihono
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Publisher : Universitas Pelita Harapan

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The objective of this research is to develop and test the demonstration tool of Arduino based air heater controller with Proportional Integral Derivative (PID) based control methods for the temperature range between 50ºC and 70ºC.   Arduino Uno was programmed using C-language to do control tasks and to transfer control data serially to computer via USB port. The selection of the initial PID  parameters are determined using the combination of Relay Feedback method and Ziegler-Nichols  formula.  The control methods were focused on proportional (P), proportional derivative (PD) dan Proportional Integral Derivative (PID) with the performance criteria based on overshoot  dan steady state error.  The experimental results show that the PID controllers give best output responses in terms of zero steady state errors, while P and PD controllers still result in steady state errors of about 3ºC. In addition, P controllers still give about 2,5ºC-4ºC fluctuative output values below set points, while the PD and PID have very small fluctuative values and even very close to zero. This laboratory demonstration tool has shown very good PID based controller performance, so it is feasible to be used as a supporting demonstration tool for control system laboratory in Politeknik Negeri Semarang or even other universities.
Metabolite Profiles and Antioxidant Activity of Caulerpa racemosa with Different Handlings sihono, Sihono; Tarman, Kustiariyah; Madduppa, Hawis; Januar, Hedi Indra
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 13, No 3 (2018): December 2018
Publisher : Research and Development Center for Marine and Fisheries Product Processing and Biotechnol

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.v13i3.355

Abstract

 Metabolite profiles and antioxidant activity of Caulerpa racemosa extract with different handlings were investigated. Three different handlings during transportation were applied, namely samples chilled with ice, stored in liquid nitrogen and soaked in seawater. The different handling significantly affected the yield of ethanolic crude extracts and inorganic fractions but insignificantly to organic fractions. Different handlings resulted in differences of major fractions of C. racemosa extracts. Major fractions of the sample that was handled with chilling temperature contained low polar fractions (K10, K11, K12, and K13), while seawater handling extract contained very polar (K1, K2 and K3), polar (K6, K7, and K8) and low polar (K13) fractions. The extract of the sample handled in liquid nitrogen contained balanced fractions. Chilling temperature handling produced highest antioxidant activity (IC50 below 2,000 ppm) in ethanolic extract of C. racemosa. Keywords: antioxidant activity, Caulerpa racemosa, ethanolic extract,handlings, IC50