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Masthura Masthura
Department of Physics, Universitas Islam Negeri Sumatera Utara, Deli Serdang 20353, Indonesia
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Designing a mosque charity box with voice recognition and GPS based on the internet of things Ainun Azizah; Masthura Masthura; Mulkan Iskandar Nasution
Indonesian Physics Communication Vol 21, No 2 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.2.171-174

Abstract

A security system for mosque donation boxes has been designed and built with the goal of developing a tool that can identify mosque charity box theft using the Internet of Things. The ATmega328P and ESP-32 microcontrollers are the two used in this device. Additionally, a GPS module, speech recognition, and an HC-SR04 ultrasonic sensor are included with this tool. This demonstrated that the Neo-6M GPS Module was used quite accurately with a distance difference of about 3 m. The test results from the GPS on the mosque's donation box obtained latitude and longitude points of 3.492006 and 98.587856, respectively, while the coordinate points on Google Maps were 3.491760 and 98.587943. The HC-SR04 ultrasonic sensor's purpose is to track movement in the Afterwards, a buzzer or early-warning alarm will ring, and Wi-Fi will notify the telegram application of the coordinates. This tool also includes a pretty contemporary voice recognition-based system for opening and closing donation boxes, which can accurately record, recognize, and detect sound.
Reducing free fatty acid and peroxide levels in refining used cooking oil made from activated carbon from Barangan banana peels Dian Frasisca; Ety Jumiati; Masthura Masthura
Indonesian Physics Communication Vol 21, No 2 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.2.155-158

Abstract

Everyday life requires a food processing component known as cooking oil. Repeated use of cooking oil can reduce its quality and cause it to have high levels of free fatty acids and peroxides. The purpose of this study was to find out how to purify cooking oil using activated carbon made from Barangan banana peels to reduce the amount of free fatty acids and peroxide value. The activated carbon samples used in this study were sample A (5.5 g), sample B (10.5 g), and sample C (15.5 g). Sample C with 15.5 g of activated carbon had a free fatty acid test result of 0.16% and a peroxide number of 3.91 mek O2/kg which was the best result in this study, and was in accordance with SNI 01-7709-2019.
Co-Authors Ainun Azizah Dian Frasisca Ety Jumiati Mulkan Iskandar Nasution