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Hardiati, Sri
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Computer Science & IT

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Desain Alat Pengendali Nilai Redaman Attenuator Digital Radio Frekunsi (RF) Pada Sistem Komunikasi Melalui Jaringan TCP/IP Pristianto, Eko Joni; Hardiati, Sri
INKOM Journal Vol 5, No 1 (2011)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (399.729 KB) | DOI: 10.14203/j.inkom.80

Abstract

This paper presents interface circuit design between personal computer (PC) and a digital attenuator radio frequency (RF). This system is functioned to control the amplitude attenuation value or strength the RF analog signal until resulting a desired signal level into RF communication systems. The interface circuit will replace a manual digital attenuator controlled system by switch. In this design delivery data system by TCP/IP and microcontroller are used to be input-output device and software designed with basic langguage. The interface circuti  design are purposed to control attenuation of the RF digital attenuation through PC with the result that can controlling systems from long distance.
Pengendali Kecepatan Motor Induksi 3-Phase pada Aplikasi Industri Plastik Hardiati, Sri; Oktafiani, Folin; Pristianto, Joni; Praludi, Teguh; Wijayanto, Yusuf Nur
INKOM Journal Vol 3, No 1-2 (2009)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (51.584 KB) | DOI: 10.14203/j.inkom.36

Abstract

A circuit for speed controlling of three phase motor induction was designed and implemented. The circuit is using triac as main of component and supported by diac, diode, and the other passive electronics component. The result is a prototype of the speed controlling circuit. The circuit was implemented in plastic industry for keeping of the plastic yarn, so we can optimize production process and increasing the result as better quality and efficient. Keywords: control, speed , triac, motor induction
Pengendalian Electromagnetic Interference (EMI) Printed Circuit Board (PCB) dalam Perkembangan Peralatan Elektronik Hardiati, Sri
INKOM Journal Vol 2, No 2 (2008)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (558.428 KB) | DOI: 10.14203/j.inkom.27

Abstract

Electromagnetic Interference (EMI) merupakan persoalan dalam sistem maupun subsistem. Perkembangan produk elektronik dengan menggunakan sistem  desain elektronik digital dan dengan menerapkan komponen  microprocessor bertambah pesat, maka desain produk elektronik terutama  yang menggunakan sistem  rangkaian digital merupakan sumber Electromagnetic Interference (EMI), yang dapat mengganggu pengoperasian produk elektronik yang berada disekitarnya. Komponen –komponen elektronik yang terpasang pada Printed Circuit Board (PCB) akan saling berinteraksi satu dengan yang lain yang juga merupakan sumber EMI dan dapat mempengaruhi kinerja (performance) dari sistem produk elektroniknya sendiri. Persoalan EMI diatas dapat dikendalikan dengan mengurangi pancaran radiasi elektromagnetik dari komponen –komponen yang ada dalam sistem suatu produk. Dalam paper ini , dibahas mengenai sumber noise yang timbul dari PCB dan sistem pengendalian EMI yang dilakukan melalui PCB.Kata kunci EMI, PCB, Radiasi Electromagnetic.
Co-Authors Folin Oktafiani, Folin Pristianto, Eko Joni Pristianto, Joni Teguh Praludi Yusuf Nur Wijayanto, Yusuf Nur