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All Journal Jurnal Nasional Komputasi dan Teknologi Informasi Buletin Poltanesa
Ahmad Fajri
STMIK Widya Cipta Dharma
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Neuroscience Transportation

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Otomatisasi Proyektor di Ruang Kelas Menggunakan NodeMCU dan Sensor Passive Infrared Receiver (PIR) Triguna Roberdi Palimbunga; Ahmad Fajri; Siti Lailiyah
Jurnal Nasional Komputasi dan Teknologi Informasi (JNKTI) Vol 8, No 3 (2025): Juni 2025
Publisher : Program Studi Teknik Komputer, Fakultas Teknik. Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jnkti.v8i3.9160

Abstract

Abstrak – Perkembangan teknologi di bidang otomatisasi telah membuka peluang untuk meningkatkan efisiensi dan kenyamanan dalam lingkungan pendidikan, khususnya dalam pengelolaan perangkat elektronik seperti proyektor. Penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem otomatisasi proyektor berbasis NodeMCU ESP8266 yang terintegrasi dengan sensor Passive Infrared Receiver (PIR), limit switch, dan infrared(IR) transmitter. Sistem dikembangkan menggunakan metode prototyping dan diuji melalui metode black box testing. Sistem dirancang agar dapat menyalakan dan mematikan proyektor secara otomatis berdasarkan deteksi gerakan pengguna dan posisi kabel HDMI. Kebaruan dari penelitian ini terletak pada pemanfaatan limit switch sebagai indikator fisik keterhubungan kabel HDMI, yang belum umum diterapkan dalam sistem otomasi proyektor. Sistem diujicoba di ruang kelas STMIK Widya Cipta Dharma dan menunjukkan hasil yang sesuai dengan rancangan. Penelitian ini diharapkan dapat menjadi solusi dalam mewujudkan ruang kelas yang cerdas dan efisien.Kata kunci: otomatisasi proyektor; NodeMCU; sensor PIR; limit switch; ruang kelas; prototyping. Abstract - Technological advancements in the field of automation have opened opportunities to enhance efficiency and convenience in educational environments, particularly in the management of electronic devices such as projectors. This study aims to design and implement a projector automation system based on the NodeMCU ESP8266, integrated with a Passive Infrared Receiver (PIR) sensor, a limit switch, and an infrared (IR) transmitter. The system was developed using the prototyping method and tested through black box testing. It is designed to automatically turn the projector on and off based on user motion detection and the position of the HDMI cable. The novelty of this research lies in the use of a limit switch as a physical indicator of the HDMI cable's connection status, which is not commonly applied in projector automation systems. The system was tested in a classroom at STMIK Widya Cipta Dharma and showed results consistent with the design. This research is expected to contribute to the realization of smart and efficient classrooms.Keywords: projector automation; NodeMCU; PIR sensor; limit switch; classroom; prototyping.
Developing a Calorie Requirement Application Based on a BMI Calculator for Android Using User-Centered Design (UCD) Fadjri Astra Ryan Sinurat; Heny Pratiwi; Ahmad Fajri
Poltanesa Vol 26 No 2 (2025): December 2025
Publisher : P3KM Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/tanesa.v26i2.3557

Abstract

This study aims to develop an Android-based calorie requirement application using the User-Centered Design (UCD) approach and to evaluate its usability through the System Usability Scale (SUS). The application calculates individualized calorie needs using the Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) formulas, while the Body Mass Index (BMI) feature functions only as a weight classification tool to support user awareness. Healthcare workers at Puskesmas Loa Ipuh were involved throughout the research, concept development, design, prototyping, and testing stages to ensure that the system aligns with real user needs. The UCD process used in this study consists of five stages: research, concept, design, development, and testing. The final application was built using the Kotlin in Android Studio and includes features such as calorie calculation, BMI calorie calculates, food recommendations, and daily nutritional tracking. Usability evaluation with the System Usability Scale involved 23 respondents and resulted in an average score of 82.60, which falls into the “excellent” category, indicating that the application is easy to use, efficient, and well accepted by target users. These findings demonstrate that integrating UCD with validated calorie estimation formulas can produce a functional and user-centered mobile application that supports users in understanding their daily calorie needs and improves accessibility to basic nutritional information.
Co-Authors Fadjri Astra Ryan Sinurat Heny Pratiwi Siti Lailiyah Triguna Roberdi Palimbunga