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Laboratorium Instrumentasi dan Elektronika Jurusan Fisika UNDIP

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PEMBUATAN SISTEM KENDALI POSISI AUTOFOKUS EKSPERIMEN LENSA DENGAN MOTOR LANGKAH Gunadi, Isnain; Gernowo, Rahmat; Adi, Kusworo
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015
Publisher : BERKALA FISIKA

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Abstract

The automatic lens experiment with stepper motor position control has been made. Main component of this device are stepper motor which move the lens and screen. Microcontroller is contens the programs of motor movement controller. The screen contain of Light Dependent Resistor (LDR) as voltage sensor. This image will focused when the voltage in the screen is maximum. The result of test show that the automatic measurement is more accurate than manual measurement.Keywords: Auto-Fokus, LDR, IPMC, LSW, EAPs, VCM
RANCANG BANGUN ALAT PENGUKUR DENSITAS OPTIK RADIOGRAF SINAR-X DIGITAL Sumariyah, Sumariyah; Gunadi, Isnain; Mujib, Syaiful
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

A digitized X-ray radiograph?s optical density measurer has been designed.  It?s scale work is between  0.00 to  4.42. The main part of  this instrument is an optocopler sensor which will convert the light passing by  to an analog current. An optocopler circuit is a combination of LED as a light source, and a photoresistor as a light sensor. The sensor circuit is combined with a voltage devider circuit so that the voltage caused by the light and the output is work reversely. Besides, it combined with an instrumentation amplifier which amplifies the output voltage of the whole sensor. A decoder then added to the circuit to translate the BCD code to a seven segment display. The related segment, then, turned on according to the magnitude of the output voltage. The last part is a seven segment displayer which displays the measure?s result. According to a testing oxamination, the instrument is able to produce a measurement result till a resolution of 0.01.
PEMPROGRAMAN MESIN BOR OTOMATIS BERBASIS ATMEGA 328 YANG TERINTEGRASI LCD TOUCHSCREEN NEXTION 3,2 INCHI Ikbal, Muhammad Nur; Gunadi, Isnain
BERKALA FISIKA Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019
Publisher : BERKALA FISIKA

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Abstract

The aim of this study is to develop an automatic drilling machine based on Atmega328integrated with the 3.2 inch-Nextion LCD Touchscreen. The drilling machine was designed to automatically determine the distance and the number of holes according to the LCD touchscreen nextion display, both for movement on the Y-axis and X-axis, using a PH268-21 series unipolar of stepper motor and was controlled by a CSD2120P type motor driver. Meanwhile, to perforate the workpiece using an AC motor with a voltage of 220 volts. Machine control used 2 Limit Switches as calculation indicators to be processed by a microcontroller that has been programmed using the Arduino IDE software and displayed on the Nextion LCD touchscreen. From the test it was found that this automation system is very accurate to produce number of holes. The accuracy of distance used as an initial indicator of this automatic drilling machine was 1 mm and it can be changed according to desired needs. Therefore, this automatic drilling machine can provide more effective and efficient results so that it is expected to help in maximizing results for industrial-scale.Keywords: limit switch, unipolar stepper motor, micro-controller, Nextion LCD touchscreen
RANCANG BANGUN SISTEM PENGONTROL TEMPERATUR MENGGUNAKAN MIKROKONTROLLER ATSAM3X8E PADA PERALATAN ULTRASONIC ASSISTED EXTRACTION (UEA) Nur Indarwati, Siti Hastin; Gunadi, Isnain; Suryono, Suryono
YOUNGSTER PHYSICS JOURNAL Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

In this research, design of temperature control system has been made for Ultrasonic Assisted Extraction (UAE) equipment. The system consisted of elemen pemanas, temperature, sensor such as Resistance Temperature Detector (RTD) sensor, relay, microcontroller and computer interface. Microcontroller that used in this system is ATSAM3X8E microcontroller that connected with computer interface as the temperature data viewer that is using Borland Delphi 7. Temperature controller could be built by RTD sensor through computer interface so it could save and show the data in MySQL database. This system ca be applied as temperature controller system for extraction equipment. From this research?s result showed system that has been built can measure and control temperature using RTD sensor with the error?s value in measurement is 0,04oC. From the controlling system testing?s result with given set point is 35oC can be known that tis controlling system has delay until it started which is for 6 minutes with the control stability?s condition 97,09% and error value 2,91%.Keywords: temperature, controller, RTD sensors, database, MySQL
DESAIN DAN IMPLEMENTASI PENGUKURAN PARAMETER LINGKUNGAN DENGAN RASPBERRY PI SEBAGAI NODE Virsaw, Agvion; Gunadi, Isnain; Adi, Kusworo
YOUNGSTER PHYSICS JOURNAL Vol 6, No 1 (2017): Youngster Physics Journal Januari 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Environment is a system that greatly affects the growth and development of organisms. In this earthly life, the environmental factors such as temperature, humidity and light intensity is an element which greatly affect humans, animals and plants to be able to adapt to its environment. Pollutants in the environment will be different in a place where others because of their conditions of temperature, humidity and lighting that will bring great influence in the spread of pollution, both in the local scale (the environment) or regional scale (environmental and vicinity). The effects of air pollution is the result of adverse impact on the environment, human health, and many living things on earth. Air pollution is a disorder that most complaints by the people. By making measurements of environmental parameters monitoring tool with LDR sensor for measuring changes in light, and DHT11 to measure changes in temperature and humidity that will be processed by the Raspberry Pi which is then displayed on a 16x2 LCD interface and stored in the database. Expected to monitor environmental parameters in real time. Some of the variables resulting from the environmental parameter measurement system with Raspberry Pi as a node such as temperature, humidity, and light intensity in the environment. The results of the data obtained by the sensor readings performed by the Raspberry Pi has a fairly good accuracy of ±  C for temperature, ± 5% RH for humidity, and ± 4,3 Lux intensity. The result shows that the system is running well. Keyword : LDR Sensor, DHT11, LCD 16x2, Raspberry Pi, Database
PENGIRIMAN DATA HASIL PENGUKURAN PARAMETER LINGKUNGAN MENGGUNAKAN JARINGAN SELULER DENGAN RASPBERRY PI SEBAGAI NODE Armin, Husen Nasrullah; Gunadi, Isnain; Widodo, Catur Edi
YOUNGSTER PHYSICS JOURNAL Vol 6, No 1 (2017): Youngster Physics Journal Januari 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

In this research has built a data delivery system of environmental parameters from Raspberry Pi into a webserver database for monitoring temperature, humidity, and light intensity in realtime, which used two Raspberry Pi as the two sensor nodes. Data from measurement of temperature, humidity, and light intensity of the sensor node is transmitted into the webserver via the mobile network, then the data is stored in a MySQL database, then the data is displayed in the form of websites. Applications to display the information of temperature, humidity and light intensity are made in the form of web programming with PHP and HTML discussed. With the appearance of the web is expected to facilitate the users to access through related information anywhere and anytime with the terms connected to the network internet. from this study, obtained results Raspberry Pi is able to transmit the observed data well into the webserver with a minimum data transmission delay of 1 second and 12 second maximum delay for a sensor node-1 and minimum delivery delays 1 second and 13 second maximum delay for sensor node-2.Keywords : Raspberry Pi , webserver, PHP, MySQL
RANCANG BANGUN PENGENDALI MOTOR STEPPER UNTUK DETEKSI JUMLAH OBYEK PUTAR DENGAN MENGGUNAKAN KOMPUTER Sumariyah, Sumariyah; Sudarmanto, Agus; Gunadi, Isnain
BERKALA FISIKA Vol 14, No 1 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

It has been designed a mechanical equipment what could moving rotate each 45° and moving up and down betake to sensor hole, that be drive by two stepper motors. The operation of both stepper motors use Turbo Pascal language programming 5.5 version. The mechanical equipment could be operated in a automatically that is for moved the object rotate each 45° then the object betake down aim sensor hole and execute detection the object so after detected then the object move ascend aim first position. Result of using this mechanical equipment was have appearing result from detection object be automatically that is amounting to eight objects.   Keyword : PC, stepper motors, object rotate.