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All Journal Jurnal Fisika Unand Faraday: Journal of Fundamental Physics, Research, and Applied Science
Akbar Sujiwa
Universitas Pembangunan Nasional "Veteran" Jawa Timur
Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Comparative Analysis of CCS811 Sensor Usage in Wearable Studies for Cigarette Smoke Detection: Literature Review Billy Maniani; Akbar Sujiwa; Primasari Cahya Wardhani; Nailul Hasan; Fajar Timur
Faraday: Journal of Fundamental Physics, Research, and Applied Science Vol. 1 No. 2 (2025): Faraday: Journal of Fundamental Physics, Research, and Applied Science
Publisher : Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/faraday.v1i2.16

Abstract

The CCS811 sensor is a metal oxide semiconductor (MOX)-based gas sensor that is widely used in wearable systems to monitor air quality personally, especially in detecting volatile organic compounds (VOCs) contained in cigarette smoke. This study aims to conduct a systematic review of various studies that implement the CCS811 sensor in wearable devices for cigarette smoke detection, focusing on aspects of accuracy, sensitivity, detection time, and the effect of room size. The method used is a systematic literature review of 19 scientific articles published in the last ten years. The results of the review show that the CCS811 has several advantages, such as low power consumption, compact sensor size, real-time VOC detection capability, and easy integration with the Internet of Things (IoT) system. Quantitatively, this sensor is able to detect TVOC concentrations in the range of 20–1158 ppb, with a response time of less than 20 seconds in a small space. However, limitations are still found in terms of selectivity to certain types of compounds and the lack of studies evaluating the effect of room characteristics on detection performance. This study recommends further testing in various real-world conditions as well as the application of machine learning algorithms to improve the accuracy and adaptability of the CCS811-based wearable system in effectively detecting cigarette smoke.
The Application of a Finite Impulse Response Low-Pass Filter for Noise Reduction in Voice Signals Fauziyah Vida Rahmah Wijaya; Prastika Ramadhani; Ladya Cheryl Az Zahra; Sakinah; Akbar Sujiwa
Faraday: Journal of Fundamental Physics, Research, and Applied Science Vol. 2 No. 1 (2026): Faraday: Journal of Fundamental Physics, Research, and Applied Science
Publisher : Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/faraday.v2i1.22

Abstract

This study investigates the effect of noise on human voice signals and noise reduction efforts using digital signal processing techniques. The objective of this research is to analyze and compare the frequency characteristics and clarity of the original voice signal with those of noise-contaminated signal after undergoing a filtering process in MATLAB. The research methodology includes voice recording, superposition of the voice signal with noise, and filtering using a 50th-order Finite Impulse Response (FIR) low-pass filter with a cutoff frequency of 500 Hz implemented in MATLAB. The analysis is conducted in the frequency domain using the Fast Fourier Transform (FFT) and in the time domain through waveform observation. The results indicate that noise introduces high-frequency components and irregular amplitude fluctuations. After filtering, the high-frequency components are effectively attenuated, resulting in a smoother and more stable signal while preserving the primary characteristics of the human voice. These findings demonstrate that the FIR low-pass filter is effective in improving the quality of human voice signals.
Luminescent Solar Concentrator (LSC) Berbasis Coumarin Terintegrasi dengan Fotovoltaik sebagai Fasad Bangunan Penghasil Energi Listrik Kerta Adi Wasana; Akbar Sujiwa; Nur Aini Fauziyah
Jurnal Fisika Unand Vol 15 No 3 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.3.253-259.2026

Abstract

The integration of renewable energy systems in buildings offers a promising approach to enhance the sustainable utilization of clean energy. This study presents the development of a renewable energy prototype based on a Luminescent Solar Concentrator (LSC) integrated with photovoltaic modules for building façade applications. The LSC was fabricated using epoxy resin mixed with coumarin, producing samples with dimensions of 100 cm² and 400 cm². Photovoltaic modules were installed along the edges of the LSC to capture guided light and convert it into electrical energy. The prototype was evaluated using a measurement system that continuously records voltage, current, and power output. Experimental testing was conducted from 07:00 to 16:00 (WIB) under direct sunlight to analyze the system response to variations in solar irradiance. The results indicate that the system produces relatively stable voltage output, while the current and power vary depending on the intensity of solar radiation. The maximum voltage, current, and power obtained were 36.1 V, 1.14 mA, and 40.07 mW, respectively. These findings demonstrate the potential of the proposed LSC–photovoltaic prototype as a renewable energy harvesting system for building applications, particularly within the concept of Building Integrated Photovoltaics (BIPV).
Co-Authors Billy Maniani Fajar Timur Fauziyah Vida Rahmah Wijaya Kerta Adi Wasana Ladya Cheryl Az Zahra Nailul Hasan Nur Aini Fauziyah Prastika Ramadhani Sakinah