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All Journal Jurnal Fisika Unand Jurnal Otomasi Kontrol dan Instrumentasi
Maria Evita
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Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Alat Ukur Curah Hujan Tipping-Bucket Sederhana dan Murah Berbasis Mikrokontroler Maria Evita; H Mahfudz; Suprijadi Suprijadi; Mitra Djamal; Khairurrijal Khairurrijal
Jurnal Otomasi Kontrol dan Instrumentasi Vol 2 No 2 (2010): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2010.2.2.1

Abstract

Telah dirancang dan dibangun alat pengukur curah hujan tipe tipping-bucket (TB) berbasis mikrokontroler AT89S8252. Alat ini menghasilkan tetesan 0,21 mm untuk daerah tabung kecil terpancang sebagai penerima tetesan (tipping-bucket/TB) dari kerucut penampung air hujan seluas 2837,54 mm2. Untuk mencacah TB-nya, sensor tipe reed switch digunakan dan dibaca oleh data logger berbasis mikrokontroler AT89S8252. Data logger tersebut dilengkapi sebuah real time clock dan komunikasi serial agar dapat mengirimkan data ke komputer. Curah hujan maksimum yang bisa diukur adalah 914,4 mm/jam. Kata kunci: Curah hujan, sensor reed switch, mikrokontroler AT89S8252AbstractA Tipping-bucket (TB) rain gauge using AT89S8252 microcontroller has been designed and built. This device produces 0,21 mm drops of water for the small tube receiver (tipping bucket/TB) from the rain water cone area of 2837,54 mm2. Reed switch sensor is used for sampling TB and the sampling data will be read by data logger system using AT89S8252 microcontroller. Data logger system is provided with real time clock and communication serial for sending the data to the computer. Maximum rainfall that can be measured is 914.4 mm/hr. Keywords: Rainfall, reed switch sensor, microcontroller AT89S8252
Alat Deteksi Denyut Jantung Tipe Fingertip dengan Sensor Non-invasif untuk Masyarakat Pedesaan (Studi Kasus Desa Raharja, Banjar, Jawa Barat) Maria Evita; Prihatini, Jihan; Sawita, I Kadek Agus Sara; Kamal, Muhammad; Aprianti, Nur Asiah
Jurnal Fisika Unand Vol 14 No 5 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.5.500-506.2025

Abstract

Heart disease is one of the most lethal diseases in the world, including in Indonesia. This disease affects both urban and rural populations Lack of access to medical equipment particularly for heart rate detection, is the reason for developing a fingertip-type heart rate device using a cheap and convenient non-invasive sensor. This system consists of an infrared sensor equipped with an analog filter, an operational amplifier and Arduino Uno microcontroller for signal processing, and an LCD for displaying the heart rate. After calibration, this system was tested on 20 participants in Desa Raharja to validate its performance. In two phases of testing, the average accuracy obtained ranged from 3.28% to 8.08% in phase 1, and from 2.89% to 31.73% in phase 2. Most of the results have met the accuracy standards for heart rate detection equipment. The shortcomings of this research allow for further development in future studies.
Co-Authors Aprianti, Nur Asiah ARI SETIAWAN Azka Zakiyyatuddin H Mahfudz Herlan Darmawan Imam Suyanto Irwan Meilano Irzaman, Irzaman Khairurrijal Khairurrijal Mitra Djamal Mitra Djamal Mohammad Yasin Muhammad Kamal Nina Siti Aminah P. Perdinan Prihatini, Jihan Retna Apsari Sawita, I Kadek Agus Sara Sensius Seno Suprijadi Suprijadi Suprijadi Suprijadi Suryanto, Wiwit Wahyu Srigutomo Wahyudi Wahyudi