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All Journal Jurnal Otomasi Kontrol dan Instrumentasi Jurnal ULTIMA Computing Jurnal Pengabdian Vokasi
Megarini Hersaputri
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Journal : Jurnal ULTIMA Computing

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Rancang Bangun Adjustable Power Supply dengan Overload Current Protection Berbasis IC LM723 Ari Bawono Putranto; Fakhruddin Mangkusasmito; Much. Azam; Zaenul Muhlisin; Megarini Hersaputri
Ultima Computing : Jurnal Sistem Komputer Vol 13 No 1 (2021): Ultima Computing : Jurnal Sistem Komputer
Publisher : Faculty of Engineering and Informatics, Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/sk.v13i1.2056

Abstract

The type of power supply that is commonly used is the adjustable power supply. Its ability to generate a varying voltage level, making it suitable for testing a wide variety of electronic circuits. A conventional protection system of this type is usually a fuse, overcurrent event occurred due to improper installation of the components and circuit design will make this protection system is active and needed replacement fuse. To eliminate the need for fuse purchases at the Instrumentation and Electronics Engineering Laboratory, Undip Vocational School, an adjustable power supply was built with an overload current protection based on the LM723 IC for an operating level of 1 ampere. The system was built as non-fuse protection current limiter. This study will describe the stages of the manufacturing and testing system. The test results show that the power supply output is linear with the coefficient of determination = 0.99 and correlation = 0.99. The system can also limit the average maximum working current of 0.95 for several variations of load resistance.
Perancangan Alat Karakterisasi Dioda dengan ESP32 dan Rangkaian Op-Amp LM358 Berbasis Android Ari Bawono Putranto; Zaenul Muhlisin; Amatul Lutfiah; Fakhruddin Mangkusasmito; Megarini Hersaputri
Ultima Computing : Jurnal Sistem Komputer Vol 13 No 1 (2021): Ultima Computing : Jurnal Sistem Komputer
Publisher : Faculty of Engineering and Informatics, Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/sk.v13i1.2088

Abstract

This research has succeeded in making a diode forward bias characterization test device using the ADC and the internal DAC of the ESP32 microcontroller. The output voltage of the DAC is added by 2 times the LM358 non-reversing op-amp amplifier circuit. So that the test results of the DAC output voltage can reach a maximum value of 6.3 volts as a source of variable DC power supply for the diode forward bias characteristic test circuit. Diode forward bias characterization testing is carried out through the interface of an Android smartphone with a WiFi network and a forward bias characterization curve is obtained which has a value and shape almost the same as the manual test. Testing the diode forward bias characterization using this application is faster than using manual measurements with a multimeter measuring instrument. Based on tests carried out using the Android smartphone application for 3 times, it was obtained an average time of 30 seconds, while manually using a measuring instrument obtained an average time of 657.7 seconds.
Co-Authors Agus Samsi Ainie Khuriati Amatul Lutfiah Ari Bawono Putranto Ari Bawono Putranto Fakhruddin Mangkusasmito Isnain Gunadi Jatmiko Endro Suseno Much. Azam Sutanto Hadisupadmo Zaenul Muhlisin Zaenul Muhlisin