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All Journal Bulletin of Electrical Engineering and Informatics Jurnal Informatika Teknologi dan Sains (Jinteks)
I Gde Eka Dirgayussa
Institut Teknologi Del
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

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Detection roasting level of Lintong coffee beans by using euclidean distance Yohanssen Pratama; I Gde Eka Dirgayussa; Paian Fernando Simarmata; Mia Hotmaria Tambunan
Bulletin of Electrical Engineering and Informatics Vol 10, No 6: December 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v10i6.3153

Abstract

Coffee roasting is the process by which raw coffee beans (green beans) are roasted until they reach a certain roast level. In general, the roast level of roasted coffee beans is divided into 3 levels, namely the roast level of light, medium and dark. One way to find out the roast level of roasted coffee beans is to see the color change of the coffee beans. However, it is very difficult to know the exact color conditions of each roast level of roasted coffee beans and this can be overcome by build an automatic coffee roasting equipment. In this research, an automatic coffee roaster was done with a system that is able to control the roasting temperature and stirring of coffee beans. This tool can also monitor the change in color of the coffee beans during the roasting process. The system that has been implemented can detect color changes and classify the level of dark roast of roasted coffee beans using the Euclidean distance algorithm. The Euclidean distance give a threshold to classified the roast level. The system accuracy for predicting coffee beans color at the level of dark roast is 90% and 80% for overall.
PERANCANGAN DAN IMPLEMENTASI PROTOTIPE WIRELESS POWER TRANSFER PADA SEPEDA MOTOR LISTRIK Indra Hartarto Tambunan; Ester Yemima Br Bangun; I Gde Eka Dirgayussa; Angela Grace Gitarana Doloksaribu; Andreas Stephan Simanjuntak
Jurnal Informatika Teknologi dan Sains (Jinteks) Vol 6 No 2 (2024): EDISI 20
Publisher : Program Studi Informatika Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51401/jinteks.v6i2.3998

Abstract

Advances in Wireless Power Transfer (WPT) system technology are increasingly being applied to the process of recharging battery packages for electric motorbikes. The battery package for an electric motorbike, 48 Volt 15 Ah, is used as a reference for the achievement target in this research. The WPT system is designed to be able to transfer or produce power equal to 10% of the battery package capacity. Utilization of Faraday's law which states that the number of turns in the transmitter and receiver coils used in the WPT system affects changes in flux and the amount of energy that can be transferred by the coil. In this paper, we will explain the WPT system experiments to compare system efficiency by changing the variables of coil diameter, number of coil turns, and distance between coils. Experiments show that the larger the coil diameter, the greater the output power on the receiver coil. The more turns the coil has, the greater the output power on the receiver coil, but the greater the distance between the coils, the smaller the output power on the receiver coil.
Co-Authors Andreas Stephan Simanjuntak Angela Grace Gitarana Doloksaribu Ester Yemima Br Bangun Indra Hartarto Tambunan Mia Hotmaria Tambunan Paian Fernando Simarmata Yohanssen Pratama