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All Journal PINTER : Jurnal Pendidikan Teknik Informatika dan Komputer Journal of Electrical Vocational Education and Technology
Djaohar, Mochammad
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Computer Science & IT Education Electrical & Electronics Engineering Engineering Library & Information Science

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Design and Development of a Heart Rate and Blood Oxygen Saturation Monitoring Device in Humans During Sleep Condition Based on the Internet of Things Fiyanto, Roy Oktaf; Djaohar, Mochammad; Subekti, Massus; Sunawar, Aris
Journal of Electrical Vocational Education and Technology Vol. 7 No. 1 (2024): Journal of Electrical Vocational Education and Technology, Volume 7 Issue 1, Ju
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JEVET.0071.05

Abstract

This research aims to create a heart rate monitoring device (BPM), oxygen saturation (SpO2), and electrocardiogram (ECG) in IoT-based sleep conditions and connected to Blynk and Telegram. This tool allows monitoring BPM, SpO2, and ECG values through the LCD screen on the tool or remotely through the Blynk and Telegram applications as IoT media. This research uses engineering methods that involve designing, making tools, testing tools, data collection, and data analysis.  The subjects of this research are BPM, SpO2, ECG, and the application of IoT concepts to monitor remotely and provide real-time notifications. The data analysis technique used is quantitative descriptive analysis with data collection techniques, namely laboratory observation. The conclusion of the results shows that IoT-based monitoring of heart rate and oxygen saturation in human blood has been successfully made using MAX30102 and AD8232 sensors connected to NodeMCU ESP32, as well as LCD to display measurement results. Measurements were made on twelve respondents with varying ages. The measurement was carried out by attaching the tip of the index finger of the left hand to the MAX3012 sensor to obtain BPM and SpO2 data, and attaching electrodes from the AD8232 sensor to obtain an ECG using the Bipolar lead method. The range of average heart rate measurements is at 65-94 BPM. The average value range of oxygen saturation measurements is at 95%-98%. This tool has an average measurement error value (Error) for heart rate (BPM) of 1.63% and for oxygen saturation (SpO2) of 2%. The tool also successfully connects Blynk IoT  media for Realtime  remote monitoring and Telegram application for remote notification media.
Design and Development of a Programmable Logic Controller (PLC) Trainer Kit as a Practical Support Tool for the Programmable Logic Control Course Wahab, Abdul; Djaohar, Mochammad; Yuninda, Nur Hanifah
Journal of Electrical Vocational Education and Technology Vol. 7 No. 2 (2024): Journal of Electrical Vocational Education and Technology, Volume 7 Issue 2, De
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JEVET.0072.05

Abstract

The rapid development of modern industries increasingly relies on automation systems to improve product quality, shorten production time, and reduce human labor costs. One of the technologies used in automation systems is the Programmable Logic Controller (PLC), which has replaced conventional control systems. To meet industry demands, students in the Electrical Engineering Education Program at Universitas Negeri Jakarta (UNJ) are expected to have skills in operating and programming PLCs. However, based on observations, students' understanding of PLC materials remains low, and the laboratory's supporting facilities for PLC learning are still limited. This research aims to develop a PLC Trainer Kit and its corresponding Jobsheet as a Practicum Support Tool in the Programmable Logic Control course. The development method used is Research and Development (R&D) with the ADDIE model, which includes the stages of analysis, design, development, implementation, and evaluation. The research results show that the developed PLC Trainer Kit obtained a feasibility score of 97.3% from material experts, 89% from media experts, and 94% from student trials. Thus, it can be concluded that this PLC Trainer Kit is highly suitable as a learning aid in the Electrical Engineering Education Program at UNJ. This study is expected to contribute to improving students' understanding of PLCs and facilitating more interactive and applicable learning.
Sistem Pengelolaan Akses Pintu Otomatis Berbasis Pengenalan Wajah di SMK Taruna Bhakti Depok Mawarid, Mahran; Djaohar, Mochammad; Hanifah Yuninda, Nur
Journal of Electrical Vocational Education and Technology Vol. 8 No. 2 (2025): Journal of Electrical Vocational Education and Technology, Volume 8 Issue 2, De
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JEVET.0082.01

Abstract

Abstrak Penelitian ini membahas pengelolaan akses Storage Room Teknik Elektronika di SMK Taruna Bhakti Depok yang masih menggunakan kunci manual, sehingga berisiko kehilangan, duplikasi, dan kesulitan manajemen akses. Kelemahan ini mengganggu keamanan aset dan operasional pembelajaran. Tujuan penelitian adalah merancang dan menguji sistem pengelolaan akses pintu berbasis pengenalan wajah untuk meningkatkan keamanan dan efisiensi akses. Penelitian ini dilakukan dengan menggunakan metode rekayasa teknik dengan jenis rekayasa maju (Forward Engineering). Penelitian ini mengevaluasi kinerja sistem pengelolaan akses berbasis pengenalan wajah menggunakan algoritma LBPH (Local Binary Patterns Histogram). Pengujian dilakukan dengan menggunakan 10 individu (5 terdaftar dan 5 tidak terdaftar) dengan pengujian sebanyak 5 kali pada masing-masing individu. Hasil pengujian menunjukkan akurasi sistem berhasil membuka pintu dengan persentase 100%. Rata-rata waktu proses pengenalan hingga membuka pintu adalah 6,54 detik, mencerminkan efisiensi sistem. Temuan ini menunjukkan bahwa sistem ini dapat diandalkan untuk pengelolaan akses yang aman dan cepat. Abstract This research discusses the access management of the Electronics Engineering Storage Room at SMK Taruna Bhakti Depok which still uses manual keys, thus risking loss, duplication, and access management difficulties. These weaknesses interfere with asset security and learning operations. The research objective is to design and test a face recognition-based door access management system to improve security and access efficiency. This research was conducted using engineering methods with the type of forward engineering. This research evaluates the performance of face recognition-based access management system using LBPH (Local Binary Patterns Histogram) algorithm. Tests were conducted using 10 individuals (5 registered and 5 unregistered) with 5 times testing on each individual. The test results show the accuracy of the system successfully opens the door with a percentage of 100%. The average time from the recognition process to opening the door was 6.54 seconds, reflecting the efficiency of the system. The findings show that the system is reliable for secure and fast access management.
Sistem Pembersih Panel Surya Otomatis Berbasis Internet of Things (IoT) Menggunakan ESP32 Luthfi Yusrizal, Muhammad; Djaohar, Mochammad; Sunawar, Aris
Journal of Electrical Vocational Education and Technology Vol. 8 No. 2 (2025): Journal of Electrical Vocational Education and Technology, Volume 8 Issue 2, De
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JEVET.0082.02

Abstract

Abstrak Penelitian ini bertujuan untuk merancang sebuah alat yang dapat membersihkan permukaan panel surya secara otomatis. Penelitian ini dilakukan dengan menggunakan metode rekayasa teknik dengan jenis rekayasa maju (Forward Engineering). Proses pemindaian kekotoran permukaan panel surya menggunakan sensor TCS3200 dengan memanfaatkan frekuensi warna red (R), green (G), dan blue (B) serta Sensor HC-SR04 digunakan untuk mengukur volume air yang tersedia pada ember penampungan air. Untuk memproses hasil pemindaian, digunakan mikrokontroler ESP32. Teknologi IoT (Internet of Things) digunakan untuk menghubungkan ESP32 dengan Blynk, yang memungkinkan alat untuk mengirimkan notifikasi atau data dari perangkat fisik ke platform cloud. Dalam penelitian ini, setiap komponen dilakukan pengujian yang bertujuan untuk memastikan kinerja yang optimal dalam sistem pemantauan dan pembersihan panel surya berbasis IoT.  Berdasarkan hasil pengujian volume air memiliki rata-rata selisih akurasi 3,753%. Pada pengujian sensor warna berdasarkan kondisi awal permukaan panel surya dan kondisi permukaan panel surya setelah dibersihkan, rata-rata selisih akurasinya adalah 1,6%. Berdasarkan hal tersebut alat yang dibuat dapat berfungsi dengan baik dalam membersihkan kotoran pada permukaan panel surya. Abstract This study aims to design a tool that can clean the surface of solar panels automatically. This research was conducted using engineering methods with the type of forward engineering. The process of scanning dirt on the surface of the solar panel uses the TCS3200 sensor by utilizing the red (R), green (G), and blue (B) color frequencies and the HC-SR04 sensor is used to measure the volume of water available in the water storage bucket. To process the scan results, the ESP32 microcontroller is used. IoT (Internet of Things) technology is used to connect the ESP32 with Blynk, which allows the tool to send notifications or data from physical devices to the cloud platform. In this study, each component was tested with the aim of ensuring optimal performance in the IoT-based solar panel monitoring and cleaning system. Based on the results of the water volume test, the average accuracy difference is 3.753%. In the color sensor test based on the initial condition of the solar panel surface and the condition of the solar panel surface after cleaning, the average accuracy difference is 1.6%. Based on this, the tool made can function well in cleaning dirt on the surface of the solar panel.
Design of Prototype Solar Tracking System Dual Axis Based on Positioning System (GPS) for Energy Optimization on 100WP Solar Panel Rangga Prayoga, Muhammad; Sunawar, Aris; Djaohar, Mochammad
Journal of Electrical Vocational Education and Technology Vol. 8 No. 1 (2025): Journal of Electrical Vocational Education and Technology, Volume 8 Issue 1, Ju
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JEVET.0081.03

Abstract

Abstract Static solar panels have a disadvantage in capturing solar radiation intensity optimally because they do not follow the movement of the sun. This study aims to design and develop a GPS-based dual-axis solar tracker prototype to optimize energy on a 100WP solar panel. The system tracks the sun's position in real-time based on azimuth and elevation angles using a stepper motor as an actuator, employing the R&D research method and the ADDIE approach. The results show that the solar tracker increases the energy generated compared to the static system. On December 20, 2024, energy increased by 9.6% after accounting for system power consumption. Meanwhile, on December 18, 2024, the energy increase was 5.11%, and on December 19, 2024, it was 1.0%, but these values were before deducting power consumption. The stepper motor’s power consumption of 16.125Wh over 9 hours of operation affected net energy efficiency. Testing showed a tracking error of 1.74%, with an accuracy rate of 98.26%. This study concludes that the GPS-based dual-axis solar tracker can improve the energy output of solar panels with a high tracking accuracy rate.
Pengembangan Robot Tematik Digital Twin Universitas Negeri Jakarta pada Motor dan Roda Sebagai Manuver Eryanto, Saddam Bimo; Djaohar, Mochammad; Sunawar, Aris
Journal of Electrical Vocational Education and Technology Vol. 8 No. 1 (2025): Journal of Electrical Vocational Education and Technology, Volume 8 Issue 1, Ju
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JEVET.0081.04

Abstract

Abstrak Penelitian ini memiliki tujuan untuk perancangan dan pengujian robot dengan fokus pada peningkatan stabilitas pergerakan, penyederhanaan kontrol, serta pengurangan jumlah motor penggerak. Selain itu, penelitian ini juga mengevaluasi perbedaan kinerja antara motor DC biasa dan motor encoder dengan kontrol PID untuk menentukan solusi yang lebih efisien dan optimal. Dengan demikian penulis membuat pengembangan pada motor dan roda robot menggunakan tiga buah roda omniwheel dengan asumsi koin tidak akan menyentuh lantai dan robot stabil tidak akan menyentuh robot lawan. Metode pengembangan yang digunakan adalah Research and Development (R&D) dengan pendekatan ADDIE meliputi analisis, desain, pengembangan, implementasi dan evaluasi pada robot. Hasil yang diperoleh pada pengujian yaitu untuk kecepatan, motor encoder unggul dengan 0,72 detik lebih cepat data dapat dilihat pada tabel 4.18. Pada pengujian kestabilan motor encoder unggul lebih stabil dengan grafik berada pada rentang 7000 – 10.000 pulse sinyal digital sedangkan motor DC berada pada 16.000 – 20.000 pulse sinyal digital data dapat dilihat pada tabel 4.9. Pada pengujian manuver motor encoder unggul 13,4 detik lebih cepat dari motor DC data dapat dilihat pada tabel 4.19. Kesimpulan bedasarkan hasil pengujian menunjukan bahwa robot yang dikembangkan pada motor dan roda memiliki hasil yang lebih unggul dalam kestabilan pada semua pengujian. Abstract This study aims to design and test robots with a focus on increasing movement stability, simplifying control, and reducing the number of drive motors. In addition, this study also evaluates the performance differences between ordinary DC motors and encoder motors with PID control to determine a more efficient and optimal solution. Thus, the author made developments on robot motors and wheels using three omniwheel wheels with the assumption that coins will not touch the floor and stable robots will not touch opposing robots. The development method used is Research and Development (R&D) with the ADDIE approach including analysis, design, development, implementation and evaluation on robots. The results obtained in the test are for speed, the encoder motor is superior with 0.72 seconds faster data can be seen in table 4.18. In the stability test, the encoder motor is superior and more stable with a graph in the range of 7000 - 10,000 digital signal pulses while the DC motor is at 16,000 - 20,000 digital signal pulses data can be seen in table 4.9. In the test of encoder motor maneuvers, it is 13.4 seconds faster than the DC motor, the data can be seen in table 4.19. The conclusion based on the test results shows that the robot developed on the motor and wheels has better results in stability in all tests.
Perancangan Dan Implementasi Sistem Keamanan Jaringan Menggunakan Firewall dan Web Proxy Berbasis Mikrotik di SMA Negeri 1 Kota Sukabumi Irawan, Garry Tria; Djaohar, Mochammad; M. Ficky Duskarnaen
PINTER : Jurnal Pendidikan Teknik Informatika dan Komputer Vol. 2 No. 1 (2018): Jurnal PINTER
Publisher : PTIK Fakultas Teknik UNJ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/pinter.2.1.4

Abstract

Dengan diterapkannya program Cyber School di SMA Negeri 1 kota Sukabumi, maka pelayanan jaringan wajibditingkatkan. Pelayanan jaringan yang ada saat ini masih belum maksimal terutama pada bagian pemfilterandan keamanan jaringan. Penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem keamananjaringan menggunakan firewall dan web proxy berbasis Mikrotik. Penelitian yang dilakukan di SMA Negeri 1Kota Sukabumi bulan Oktober sampai dengan Desember 2014 ini menggunakan metode Research and Development. Membuat aturan firewall dan web proxy selanjutnya menkonfigurasikan aturan tersebut padarouter gateway dan pada tahap terakhir akan melakukan uji tes terhadap setiap aturan yang telah dibuat.Konfigurasi yang diterapkan akan menjatuhkan semua aktivitas paket data yang dianggap membahayakansejumlah port. Mem-blok paket data menuju router gateway dari jaringan lokal maupun jaringan internet selainadministrator. Mem-blok situs – situs porno dan situs lainnya yang dianggap berbahaya. Hasil uji tes danscanning yang telah dilakukan didapatkan bahwa firewall dan web proxy telah berhasil mencatat alamat IPyang mencoba memasuki sistem kedalam address-list dan menolak koneksinya. Sehingga kesimpulannya,menerapkan aturan pada firewall dan web proxy telah dapat mengamankan jaringan dari serangan awalcracker.
Sistem Informasi Nilai Siswa Berbasis Web di SMK Karya Guna Jakarta Niroha, Muhammad Lomo; Sugiyanta, Lipur; Djaohar, Mochammad
PINTER : Jurnal Pendidikan Teknik Informatika dan Komputer Vol. 2 No. 1 (2018): Jurnal PINTER
Publisher : PTIK Fakultas Teknik UNJ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/pinter.2.1.5

Abstract

Sistem informasi nilai siswa berbasis web merupakan suatu sistem yang memberikaninformasi laporan nilai siswa secara online yang berupa laporan nilai serta informasi datasiswa yang bersangkutan dengan berbasiskan web sehingga membantu kecepatan dankualitas dalam penyampaian informasi. Permasalahan yang terjadi dalam pengolahan nilaisiswa di SMK Karya Guna Jakarta saat ini masih bersifat konvensional, dimana siswa danwali siswa hanya bisa melihat hasil dari kemampuan siswa tersebut pada akhir masapembelajaran atau yang kita kenal dengan istilah pembagian raport siswa. Penelitian inibertujuan untuk membangun suatu sistem informasi nilai yang mempermudah pengecekan,pencatatan dan laporan data nilai siswa yang terkomputerisasi. Dengan berbasiskan webmaka informasi data nilai siswa dapat diakses kapan saja. Sistem menggunakan multiuseryang terdiri dari administrator, guru, orang tua dan siswa. Metode yang digunakan adalahsalah satu metode pengembangan perangkat lunak, yaitu metode waterfall. Program yangdihasilkan dalam sistem ini adalah sistem informasi nilai siswa berbasis web denganmenggunakan bahasa pemrograman PHP dan database MySQL.
Co-Authors Abdul Wahab Aris Sunawar, Aris Eryanto, Saddam Bimo Fiyanto, Roy Oktaf Hanifah Yuninda, Nur Irawan, Garry Tria Luthfi Yusrizal, Muhammad M. Ficky Duskarnaen Massus Subekti Mawarid, Mahran Niroha, Muhammad Lomo Rangga Prayoga, Muhammad Sugiyanta, Lipur Yuninda, Nur Hanifah