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All Journal PROtek : Jurnal Ilmiah Teknik Elektro Al-Kharaj: Journal of Islamic Economic and Business
Aldi Setiawan
Universitas Jenderal Achmad Yani
Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy

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Implementasi Sistem Komunikasi FM Pada Prototype Pendeteksi Dini Gempa Atik Charisma; Een Taryana; Dede Irawan Saputra; Muhammad Burhannudin Misuari; Aldi Setiawan; Faisal Dharmawan
PROtek : Jurnal Ilmiah Teknik Elektro Vol 7, No 2 (2020): PRotek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v7i2.1812

Abstract

An earthquake is a vibration that occurs due to plates at the base of the earth rubbing against each other. An earthquake can have several impacts, namely material loss and loss of life and trauma for some people who feel it. This happens because people are not fast enough in getting information. Therefore we need an earthquake detection device that is relatively inexpensive. In this study designed a prototype for earthquake early detection using Frequency Modulation (FM) communication. The components of this system are Arduino Uno which functions as a microcontroller, SW-420 vibration sensor to detect vibrations, buzzer as the output of the SW-420 sensor in the form of sound and FM transmitter V2.0 which functions as a medium for transmitting radio frequency signals and sending sound from the buzzer . The level of vibration that indicates that an earthquake occurred namely 3-5 with a conversion of 5-10 SR. The system would have the ability to provide information in the form of sound received by a radio or FM receiver. The distance that can be emitted by the FM transmitter module V2.0 is 17.87 meter
The Effect of Performance Expectancy and Effort Expectancy on Purchase Intention in Wuling Electric Cars in the City of Bandung Aldi Setiawan; Abdul Ahmad Hafidh Nurmansyah
Al-Kharaj: Journal of Islamic Economic and Business Vol. 8 No. 3 (2026): All articles in this issue include authors from 3 countries of origin (Indonesi
Publisher : LP2M IAIN Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24256/kharaj.v8i3.12437

Abstract

This study examines the effects of performance expectancy and effort expectancy on purchase intention toward Wuling electric cars in Bandung City. Methods: A quantitative explanatory survey used purposive sampling among 134 Bandung residents aged at least 17 years who were familiar with Wuling electric cars. Twelve indicators were measured on a five-point Likert scale and analyzed using multiple linear regression in SPSS. Results: Performance expectancy positively affected purchase intention (B = .448; β = .550; t(131) = 9.694; p < .001), as did effort expectancy (B = .391; β = .541; t(131) = 9.537; p < .001). Jointly, both predictors were significant, F(2, 131) = 89.886, p < .001, and explained 57.8% of purchase intention variance. Implications: Wuling should emphasize measurable performance benefits and reduce perceived complexity through demonstrations, charging guidance, and accessible after-sales support. The study extends UTAUT to brand-specific electric vehicle purchase intention in an Indonesian urban market.
Co-Authors Abdul Ahmad Hafidh Nurmansyah Atik Charisma Dede Irawan Saputra Een Taryana Faisal Dharmawan Muhammad Burhannudin Misuari