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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Ilmiah KOMPUTASI Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control Prosiding Seminar Nasional Sisfotek (Sistem Informasi dan Teknologi Informasi)
Widyastuti Widyastuti
Universitas Gunadarma
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Rancang Bangun Alat Pengubah Tegangan DC Menjadi Tegangan AC220V Frekwensi 50Hz dari Baterai 12 Volt Widyastuti
Jurnal Ilmiah KOMPUTASI Vol 15, No 2 (2016): Desember
Publisher : STMIK JAKARTA STI&K

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Abstract

Beberapa peralatan elektronik memang menggunakan tegangan DC sebagai sumber daya nya, namun ada juga peralatan elektronik yang menggunakan tegangan AC sebagai sumber daya. Sumber tegangan AC bisa didapat dengan mudah dari PT. PLN, namun pada kondisi tertentu, sumber listrik PLN tidak bisa didapatkan, sehingga dibutuhkan alat pengubah tegangan DC ke AC. Alat ini digunakan untuk mengubah tegangan DC dari baterai 12 V menjadi tegangan AC 220 V frekuensi 50 Hz. Bagian utama dari alat ini menggunakan IC multivibrator, rangkaian penguat transistor, dan trafo penaik tegangan. Keluaran yang dihasilkan alat ini adalah tegangan AC. Ketika tidak diberikan beban, besar tegangan yang dihasilkan  adalah 220 V dengan frekuensi 50 Hz. Jika diberikan beban, tegangan yang dihasilkan menjadi turun. Penurunan nilai tegangan sebanding dengan besarnya beban yang diberikan, semakin besar beban yang diberikan, semakin besar pula nilai penurunan tegangannya atau dengan kata lain semakin kecil tegangan yang dihasilkan, sementara frekuensi nya tetap 50 Hz.Keyword: DC, tegangan AC, frekuensi 50 Hz, pengubah tegangan DC ke AC, multivibratorJurnal Ilmiah KOMPUTASI, Volume 15 Nomor : 2, Desember 2016 ISSN : 1412-9434
SISTEM PENCEGAHAN DINI DALAM KEBISINGAN BERBASIS ARDUIMO Ahmad Dzaky Syaddad; Widyastuti; Ahmad Fajar Ulil Abshor; Sari Dwi Kartika
Jurnal Ilmiah KOMPUTASI Vol 18, No 4 (2019): Desember
Publisher : STMIK JAKARTA STI&K

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Kebisingan pada suatu lingkungan terkadang bisa mengganggu orang-orang tertentu yang memang peka terhadap kondisi bising. Akibat dari kebisingan tersebut, seseorang mungkin bisa mengalami gangguan kesehatan seperti sakit kepala, gangguan pendengaran, dan lainnya. Kondisi yang merugikan tersebut harus dihindari, untuk itu dirancanglah alat yang mampu memberikan informasi kondisi kebisingan lingkungan sekitar, sekaligus memberikan peringatan jika kondisi kebisingan lingkungan berbahaya bagi manusia. Alat yang telah dibuat ini mampu bekerja sesuai dengan rancangan, dimana informasi status dan hasil pengukuran tingkat kebisingan dalam satuan decibel (dB) ditampilkan pada sebuah OLED display, dan buzzer berbunyi ketika tingkat kebisingan berada diatas 100 dB
Glasses for the blind using ping ultrasonic, ATMEGA8535 and ISD25120 Hartono Siswono; Widyastuti Widyastuti
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 2: April 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i2.12419

Abstract

For doing their activities, blind people need tools. The idea for designing this device is for helping the blind person. This device is a glasses specially for blind person which gives information in the form of voices through an earphone if there is an obstacle in the range of 0–58 cm. The device is using PING ultrasonic sensor, ATMEGA8535 microcontroller, and ISD25120 for recording and saving the voices. After designing and making the device, we tested the device to take the data. We use three PING ultrasonic sensors which are put at the sides of the glasses. The device will give eight different kinds of voices through the earphone. The voices depend upon the output of the PING ultrasonic sensors.
Design and Simulation of Low Power and Voltage Micro Photovoltaic Cell for Mobile Devices Ikbal Rullah; Robby Kurniawan Harahap; Eri Prasetyo Wibowo; Antonius Irianto Sukowati; Dyah Nur'ainingsih; Widyastuti Widyastuti
Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control Vol. 7, No. 1, February 2022
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/kinetik.v7i1.1355

Abstract

In this study, designed and simulated a micro photovoltaic cell circuit which is part of smartphone battery charging system sensor. Problem discussed in this paper was that smartphone are still charging battery from PLN through a wall outlet, but smartphone would be better off if it had other charging alternatives, such as being able to charge anywhere or mobile. This paper proposed used photovoltaic cell that can convert sunlight into electricity and it can charge the battery on a smartphone. Photovoltaic cell were integrated with smartphone batteries in photovoltaic IC to form a battery charging system that can charge smartphone. The design of the micro photovoltaic cell sensor section is based on from the references paper. Micro photovoltaic cell was design by modifying the resistor value in the micro photovoltaic cell circuit, so the output low voltage and power be able to charge the smartphone battery. Designed and simulated micro photovoltaic cell circuits will be carried out using LTSpice. The results that achived in this research, when shunt resistance value was configure negative, the voltage value around 200mV, the power value around 1,48µW. When the shunt resistance value was configure positive the voltage value around 199mV, the power value around 1,44µW. Analysis was carried out by comparing voltage values obtained in this study with previous studies. In this study, a smaller voltage value was obtained by modifying the resistor value in the micro photovoltaic cell circuit. The circuit design will later be implemented in 0.35µm CMOS technology.
Filsafat Ontologi Kecerdasan Buatan Pada Perkembangan Teknologi Informasi Dwi Swasono Rachmad; Widyastuti
Prosiding SISFOTEK Vol 4 No 1 (2020): Vol 4 No 1 (2020): SISFOTEK 2020
Publisher : Ikatan Ahli Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (185.043 KB)

Abstract

Philosophy is one of the important sciences, which contains various main objectives to provide the best knowledge to be used in the community. Epistomology which means two meanings of multilevel science, which has a sustainable science that can be developed and implemented to the development from time to time in accordance with current needs. With this research based on the philosophy of Aristotle which contains several potential including logic, aesthetics, and ethics, but in this case the researcher only focuses on logic. Artificial intelligence is a thing or something that is implanted in a machine to be given knowledge, intelligence to carry out activities or activities like humans do, by implanting artificial intelligence, has the aim to help humans in resolving all things that cannot be done by humans. Therefore, the connection between Aristotle's philosophy of logic and artificial intelligence is the connection between things that artificial intelligence implements is intelligence based on the knowledge that Aristotle put forward. Therefore, the importance of intelligence based on the sciences to researchers or philosophers so that artificial intelligence can always synergize with scientists..
Co-Authors Ahmad Dzaky Syaddad Ahmad Fajar Ulil Abshor Antonius Irianto Sukowati Dwi Swasono Rachmad Dyah Nur'ainingsih Eri Prasetyo Wibowo, Eri Prasetyo Hartono Siswono Ikbal Rullah Robby Kurniawan Harahap Sari Dwi Kartika