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All Journal BERKALA FISIKA YOUNGSTER PHYSICS JOURNAL
Jatmiko Endro Suseno
Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang
Articles
7
Documents
Rancang Bangun Generator Pulsa Gelombang Ultrasonik dan Implementasinya untuk Pengukuran Jarak Antara Dua Obyek

BERKALA FISIKA Vol 11, No 2 (2008): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

An instrument of pulse generator of ultrasonic wave and its implementation for distance measurement between two objects have been created through analysis using oscilloscope. This ultrasonic wave may be used in a distance measurement, material reflection analysis, and product’s depth. An ultrasonic oscillator is made with set of IC 555 as the setter of pulse amount and multi vibrator mono stabile set of IC 555 as the oscillator of ultrasonic frequency, pulse amplifier through transistor BD 139. An ultrasonic transducer using transducer 400ST/R160 and micro controller AT89S51 is used for time setter. In the amplifier set of ultrasonic receiver, Op-amp CA 3204 is used. AT89S51 is used for time setter that is made repeatedly in order that the bounce may be read on oscilloscope through P1.0. After conducting an experiment, the effective working area frequency in pulse generator of ultrasonic wave is obtained in the frequency of 38.23 kHz. In the experiment on the amount of effective pulse, the maximum reach effectively is 16 pulses. In the experiment on the distance between two objects, the writer finds out that an instrument linier grade is 0.81773 against standard measurement with R=0.99954 and SD=0.457. Meanwhile on the material reflectivity test, the writer may concludes that the bigger material mass, the bigger its reflectivity. Keywords: pulse generator of ultrasonic wave, transducer

Rancang Bangun Spektroskopi FTIR (Fourier Transform Infrared) untuk Penentuan Kualitas Susu Sapi

BERKALA FISIKA Vol 11, No 1 (2008): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

A Fourier Transform Infrared spectroscopy instrument has beed developed in the range middle infrared. The important instrument in this research is to make interferogram using He-Ne Laser based on Michelson interferometer. The result indicates that the interferogram seems work well and should give some spectra in the range of middle infrared frequencies. Key words: FTIR, interferogram, spectroscopy

Rancang Bangun Sistem Pengukur Konsentrasi Larutan Tembaga Sulfat (CuSO4) Menggunakan Komputer

BERKALA FISIKA Vol 10, No 3 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

A system  of    Sulphate Copper (CuSO4) liquid consentration measurement by using compute has been made. The display of it through monitor in the computer with the limitation of measurement  0.1 M to 1M. The main components of the measure system of   Sulphate Copper (CuSO4) liquid consentration are : tungsten filamen light which include in the sample and photodioda light sensor also IC 741 as a Operational Amplyfier to strengthen the tension of sensor output. As the chage of the output analog signal power tobe digital signal ADC 0809 is used. And also as an interfce which is the pheripheral instrument of communication equipment with computer is used PPI 8255. The software on  this measure system uses Turbo Pascal version 7.0. This system had been realized and can measure the Sulphate Copper (CuSO4) liquid consentration wich the linier regresion equal is , with X hole is the sample consentration (M) and Y hole is the measure result of the concentration (M) and the deviation is 0.0326.

SIMULASI GERAK PARTIKEL BERMUATAN DALAM PENGARUH MEDAN LISTRIK DAN INDUKSI MAGNET MENGGUNAKAN MATLAB VERSI 7.1

BERKALA FISIKA Vol 10, No 2 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Charged particle motion under external electric, magnetic induction, and electric-magnetic induction field simulation program has been made using MATLAB ver. 7.1 to get the visual description of charged particle motion. The simulation program is made based on non relativistic Lorentz equation.  Each of charged particle’s position and velocity components, which is moved under external electric and or induction magnetic filed(s), is numerically computed using forth order Runge-Kutta method and be made visible by the simulation program. Proper test of the simulation program is made using known text book as the reference. Simulation results which made of 3D profile of charged particle’s motion path  and  each velocity components has already shown that it have good relationship with the known text book   Keywords : charged particle motion, position, velocity

LINIERISASI KELUARAN PENCATU DAYA MENGGUNAKAN KOMPUTER

BERKALA FISIKA Vol 9, No 2 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

A power supply with linier output voltage that controlled by computer has been made. The range of output power supply is +2 until +16 volt.             For providing a voltage with a linier output by turning around the potentiometer in the power supply. The potentiometer is turned around by motor stepper that controlled by computer. The step angle of motor stepper is reduced by the gear combination with transmission ratio 59:26. Step angle reduction for mechanical rotate movement are 0.8° per step and with rising of the output power supply 0.1 volt per step.             This system had been realized and can work with voltage that we want and output voltage have a tolerance 0.06

ANALYTICAL MODELING OF NON PLANAR MOSFET

BERKALA FISIKA Vol 15, No 4 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The Non Planar MOSFET structure with curved-channel is one alternative MOSFET structure for enhance the electrical performance. The study was focused on the non planar deviceswhich has curved-channel including grooved-gate, recessed-channel, V-shaped and sidewallvertical MOSFET. The presence of corner region can effective in reducing the electric field at thedrain, thus improving reliability of short channel effects (SCEs). The corner effect can reducesurface potential. It can improve the characteristic of the device electrical performance, especiallythe reduction of short channel effect and hot carrier effects. Therefore, the curved-channelMOSFET has a very great application prospect in deep submicron device architecture.Keywords: MOSFET, Non Planar, curve channel, surface potential, short channel effects

SISTEM PENGUKURAN KADAR GAS SO2 SECARA JARAK JAUH UNTUK PEMANTAUAN PADA KAWASAN GUNUNG BERAPI

YOUNGSTER PHYSICS JOURNAL Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014
Publisher : YOUNGSTER PHYSICS JOURNAL

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Abstract

When a forest fire or volcanic eruption must be accompanied by the emergence of gases endanger human health. By utilizing SO2 gas sensor and telemetry system,they are effectively used for the benefit of monitoring gas levels affected areas. The method used  by a field study in Gedong Songo which is now in an active condition give off gases which are still not detected. Through SO2 gas senso gas levels that can be obtained gas levels is 3.57 ppm. All data obtained from sensors will be transmitted in real time to ground stations via the telemetry system. Results of SO2 gas concentration data transmission will be shown through the android app and then analyzed as a follow up of disaster management.Keywords: Disaster, Quadcopter, gas sensors, Telemetry, Android.