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K.N. Suarbawa
Udayana University
Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Physics

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PERANCANGAN SISTEM KONTROL OTOMATIS LAMPU PENERANGAN PADA JANGKA WAKTU 24 JAM BERBASIS MIKROKONTROLER AT89S51 I Wyn Supardi; Nyoman Wendri; K.N. Suarbawa
BULETIN FISIKA Vol 13 No 2 (2012): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Has successfully created a tool Automatic Lamp Illumination Control System based on Microcontroller AT89S51. This tool is used to turn on and dim the lights in the room. The series of Automatic Lamp Illumination Control system based on Microcontroller AT89S51 can turn on lights automatically. NSL19_M51 LDR as a sensor. Lights lit up at 19.00 - 24.00 with the intensity of 020 lux, the intensity is 001 lux dimmest occurred at 06:00 hours. This is in accordance with the principle of LDR in a state where the light resistance of the LDR is smaller then a small voltage and the lights dimmed, if in the dark resistance of the LDRvoltage is large and bright lights.
RANCANG BANGUN ALAT PENDETEKSI KETINGGIAN KOLOM CAIRAN INFUS MENGGUNAKAN SENSOR POTENSIOMETER DAN BERBASIS MIKROKONTROLER AT89S52 Putu Ayu Adi Susanti; I Wayan Supardi; K.N. Suarbawa
BULETIN FISIKA Vol 17 No 2 (2016): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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It has been made a detector of the column height of the infusion fluid using by potensiometer sensor based on AT89S52 microcontroller. This detector was compiled by potensiometer, ADC0804, microcontroller AT89S52, seven segment, buzzer, and LED. The infusion fluid that used to calibrate the potensiometer sensor and the device’s working system was Otsu-NS infusion, while the infusion fluid that used to examine the device’s working system were aminovel infusion and NaCl infusion. The results of the present research were the device has conformity between system and aminovel infusion was 99.69% and 98.75% for NaCl that gained from linear regression analysis of device’s calibration data.
Determination of Empirical Formula Model of Soil Vibration Acceleration of Denpasar Area Dwi Karyadi Priyanto; K.N. Suarbawa; Ardhianto Septiadhi
BULETIN FISIKA Vol 19 No 1 (2018): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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In this research, we have determined the model of empirical formula of Peak Ground Acceleration (PGA) based on general formula of Lin and Wu using 62 observational PGA data which corresponds to earthquake parameter data of Bali and its surroundings for year 2008-2013. Based on the regression analysis, the geometrical spreading coefficient is a = -2.019, the magnitude coefficient b = 0.894, the empirical model formula constant c = 0.551, and the empirical model of PGA model for Denpasar is. The results of statistical verification yielded a strong positive linear correlation of 0.853 with the residual error of 0.035.
Co-Authors Ardhianto Septiadhi Dwi Karyadi Priyanto I Wayan Supardi Nyoman Wendri Putu Ayu Adi Susanti