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Specta Journal of Technology
Published by Institut Teknologi Kalimantan
ISSN : 25492713     EISSN : 26229099     DOI : https://doi.org/10.0610/specta.v2i3
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Environmental Science
SPECTA journal is published by Lembaga Penelitian dan Pengabdian kepada Masyarakat, Institut Teknologi Kalimantan, Balikpapann Indonesia. SPECTA is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in the field of Physics, Mathematics, Mechanical Engineering, Electrical Engineering, Chemical Engineering, Materials and Metallurgy, Civil Engineering, Industrial Engineering, Naval Engineering, Urban Planning, Informatics, Information System, Environmental Engineering, and Ocean Engineering. SPECTA accepts submission from all over the world, especially from Indonesia.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol. 3 No. 1 (2019): SPECTA Journal of Technology" : 5 Documents clear
Desain Inverter Satu Fasa 12V DC ke 220V AC Menggunakan Rangkaian H-Bridge MOSFET Andhika Giyantara; Risky Susanto Tjiang; Subchan Subchan
SPECTA Journal of Technology Vol. 3 No. 1 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1183.999 KB) | DOI: 10.35718/specta.v3i1.112

Abstract

Inverter is an electronic circuit that convert electric voltage with direct current (DC) to alternating current (AC). One of the commonly used inverter configuration is H-Bridge circuit. Inverter with H-Bridge circuit does not need voltage-balanced diode or capacitor to operate and can be cascaded to obtain multilevel output voltage. H-Bridge circuit works by adjusting the combination of switches that were enabled. One of the commonly used switches is Metal Oxide Semiconductor Field Effect Transistor (MOSFET). The advantages of MOSFET as switching components are its fast switching speed and it did not cause current tail. Therefore, the writing of this paper aims to design a 12V DC to 220V AC 50Hz single-phase inverter with H-Bridge MOSFET circuit. The design stage begins with determining the specifications of the inverter, creating a block diagram of the inverter, determining the required components, and calculating the required parameters of the inverter. The designed inverter is simulated using Proteus 8.4 software. Simulation results are in accordance with the desired specification.
Tinjauan Aspek Tanah Dalam Pengelolaan Daerah Rawa Pasang Surut Di Kalimantan Selatan Akhmad Gazali; Fathurrahman Fathurrahman
SPECTA Journal of Technology Vol. 3 No. 1 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (749.413 KB) | DOI: 10.35718/specta.v3i1.113

Abstract

Lahan rawa merupakan lahan yang potensial digunakan untuk usaha pertanian, kehutanan dan konservasi sumber air. Para pakar berbeda pendapat mengenai luas lahan rawa di Indonesia. Perkiraan luas lahan rawa ada yang menafsirkan 34 juta hektar, ada juga yang menafsirkan 39,5 juta hektar.Berdasarkan proses pembentukannya, rawa dibedakan menjadi rawa dalam/lebak dan rawa pasang surut. Rawa pasang surut cenderung lebih banyak dikembangkan mengingat proses reklamasi berjalan lebih cepat. Berdasarkan perkiraan bahwa rerata jangkauan pengaruh pasang surut yang 100 km dari muara sungai besar, maka luas lahan yang berpotensi menjadi lahan pasang surut adalah sekitar 25-30 juta hektar. Lahan pasang surut ini umumnya terdapat di pantai-pantai Kalimantan, Sumatera dan Irian Jaya.Sistem reklamasi yang pernah dan masih dilakukan khususnya di Kalimantan Selatan tergantung kondisi tanah dan airnya, ada beberapa kondisi tanah rawa antara lain tanah rawa potensial, sulfat masam dan gambut. Proses reklamasi terus berkembang dengan telah diketemukannya kisaran komposisi senyawa organik dan sifat kimia tanah gambut pada berbagai kedalaman. Diakui terdapat berbagai kendala seperti fisik tanah, kimia tanah danbeberapa kendala lainnya, namun prospek pengelolaan tanah gambut cukup baik untuk tanaman budidaya. Hasil penelitian dan pengalaman menunjukkan bahwa dengan pengelolaan yang tepat dapat diperoleh produktivitas yang cukup tinggi pada tanah gambut.
Design of Demodulation Circuit And Arduino Uno Microcontroller Syncronization For Capacitance Sensor Menasita Menasita; Mirnawati Mirnawati; Sulistijono Sulistijono
SPECTA Journal of Technology Vol. 3 No. 1 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (779.963 KB) | DOI: 10.35718/specta.v3i1.114

Abstract

An AC signal is produced by oscillator or a similar circuit that includes demodulation. In addition to thedemodulation circuit, there is also need interface circuit which include signal conditioning, signal processing anddata acquisition. So that, the frequency can be read digitally. The purpose of this research was to createdemodulation circuit in form of colpitts-crystal oscillator and microcontroller. This research carried out severalstage. There are making colpitts-crystal oscillator, microcontroller synchronization, data retrieval and processingoutput. The DC voltage variations are 3.2 V, 9 V and 15.9 V and capacitor variations are 470 pF, 4.7 nF and 33nF. Output data in form of frequencies measured by using oscilloscope. Futhermore, the data is tested for accuracyand precision. From the test result using 470 pF, 4.7 nF and 33 nF capacitors when given 3.2 V input voltage, theprecision values were 91.35%, 93.06% and 96.17% and the accuracy value were 97.72%, 97.96%, and 98.17%.For 9 V input voltage, the precision values were 99.82%, 97.67% and 97.52% and the accuracy value were 99%,98.90%, and 98.92%. Whereas 15.9 V input voltage, the precision values were 93.43%, 96.92% and 93.66% andthe accuracy value were 98.08%, 98.75%, and 97.60%. From these data, it can be concluded that a good voltagevalue used in this ciecuit is 9 V with 470 pF capacitor where the precision value was 99.82% and the accuracyvalue was 99%.
Pengaruh Faktor Geografi Terhadap Karakteristik Bambu Petung Andromeda Dwi Laksono; Diah Tri Agustiningtyas
SPECTA Journal of Technology Vol. 3 No. 1 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1391.704 KB) | DOI: 10.35718/specta.v3i1.115

Abstract

In this study was about a comparison of geographic factors towards the characterization of petung bamboo in Indonesia and the Philippines. Bamboo is one of the plants that has advantages in the field of technical materials based on developments in composite materials and is found in various regions. In general, bamboo has lignin and cellulose, where the morphology and nature of both bamboos are not the same from different countries. Therefore,material testing was carried out on each Indonesian and Filipino petung bamboo using material characterization testing methods. The process of Differential Scanning Calorimetry (DSC) was carried out to measure calorimetry with the yield of melting point in Philippine petung bamboo at 341ºC which is lower than the melting point in Indonesian petung bamboo which is 354.34ºC. In this DSC test, quantitative and qualitative results were obtainedin the form of phase changes, melting, and transition temperatures that occurred. Then an Energy Dispersive Spectrometer (EDS) was analyzed and the carbon content of cellulose and lignin was higher in Indonesian petung bamboo, respectively 65.29 wt.% And 66.05 wt.%. The morphology of bamboo shows that the fibers and matrices present in Philippine petung bamboo are denser than those of Indonesian petung bamboo. The highest peak value based on X-Ray Diffraction (XRD) is found in Philippine petung bamboo at 2ș of 34.49 and cubic phase.
Evaluasi Kesuksesan SICANTIK Menggunakan Information Systsem Succes Model (ISSM) Gianda Almyra Lois; Anang Syaifuddin N Fadli; Michael Renaldi; Muthi’ah Rahmayanti Santoso; Yuyun Tri Wiranti
SPECTA Journal of Technology Vol. 3 No. 1 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1466.873 KB) | DOI: 10.35718/specta.v3i1.116

Abstract

Saat ini, Information and Communication Technology (ICT) atau teknologi komunikasi dan informasimerupakan sesuatu yang sudah menjadi bagian yang tidak terpisahkan dari kehidupan manusia, terutama merekayang hidup di kota besar. Teknologi komunikasi dan informasi sudah menjadi sebuah kebutuhan, salah satunyaadalah kebutuhan dihargai dan dipandang dalam kerja maupun kehidupan sehari-hari pada umumnya.Ketersediaannya juga sudah mencapai pada hal-hal yang paling rumit dan sederhana dari pengiriman,penyimpanan, pengolahan dan pengiriman data dengan kemampuan jangkauan yang sangat luas. DinasPenanaman Modal dan Perizinan Terpadu (DPMPT) Kota Balikpapan adalah salah satu instansi pemerintahanyang telah menerapkan teknologi sebagai pendukung layanan dalam proses bisnisnya salah satunya adalahdibuatnya SiCantik. Belum adanya pengukuran kinerja dan evaluasi penerapan teknologi informasi padaSiCantik dan untuk membantu DPMPT mengevaluasi serta mengembangkan teknologi informasi yangdigunakan, menjadi latar belakang dilakukannya penelitian pada Sistem divisi IT di DPMPT Kota Balikpapan.Beberapa kesimpulan yang ditemukan yaitu, telah dilakukannya Evaluasi Kesuksesan SiCantik menggunakanInformation Systems Success Model (ISSM), dan didapatkan hasil wawancara dengan pihak DPMPT sertapengolahan data evaluasi dengan menggunakan metode penyebaran kuesioner dengan jumlah respondensebanyak 47 responden yang merupakan user dari SiCantik, terdiri dari 17 pegawai DPMPT dan 30 pengunjungDPMPT. Setelah melakukan pengolahan data, didapatkan 4 usulan strategi untuk masing-masing variabel.

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