Article Per Year (5 Year)
p-Index From 2021 - 2026
2.087
P-Index
This Author published in this journals
All Journal International Journal of Electrical and Computer Engineering TELKOMNIKA (Telecommunication Computing Electronics and Control) Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Physics Student Journal Jurnal EECCIS Journal of Natural A Natural B The Journal of Pure and Applied Chemistry Research Jurnal Fisika Unand International Journal of Advances in Intelligent Informatics ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Science and Technology Indonesia al Kimiya : Jurnal Ilmu Kimia dan Terapan
Setyawan Purnomo Sakti
Department Of Physics, Brawijaya University, Malang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Physics

Published : 19 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search
Journal : telkomnika telecommunication computing electronics and control

 1 
Low-Cost Contact Angle Measurement System for QCM Sensor Setyawan Purnomo Sakti; Rizal Y Aji; Layli Amaliya; Masruroh Masruroh
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 2: June 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v15i2.4981

Abstract

Hydrophobicity is one of the importance factors in the surface properties of materials. This work presents the development of a low-cost contact angle measurement system based on goniometric measurement using a low-cost digital camera, tilt control system for surface alignment and curvature approximation algorithm to determine the contact angle between the solid and spherical cap of a water droplet. The design is specifically targeted for measuring the contact angle of a Quartz Crystal Microbalance sensor in the form of HC-49/U with a disc diameter of 8.7mm.The contact angle measurement using goniometric measurement depends on the quality of captured image and calculation method for the angle determination. Proper alignment of the sample surface is required to minimize the discrepancy of the angle measurement of water drop surface profile caused by gravity. A PIC18F4550 microcontroller is used to control the motorized tilt platform to reduce the discrepancy between left and right contact angle value. Circle fit algorithm to determine the contact angle value from the captured image is used. Using the motorized tilt control system and circle fit algorithm, the developed contact angle measurement system able to measure the contact angle with discrepancy less than 1O.
Interdigitized capacitive humidity sensor using FR4 printed circuit board material without sensitive layer Setyawan Purnomo Sakti; Jessica Alfa Aini; Shania Rachmi; Elsa Hedya Kusumaningtyas; Irma Azizah; Triswantoro Putro; Dewi Anggraeni
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 24, No 3: June 2026
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v24i3.27525

Abstract

Humidity sensors are widely used across numerous applications, including agriculture, health, industry, environmental monitoring, and high-risk environments such as chip fabrication rooms. Interdigital capacitors (IDCs) are among several humidity-sensing designs that have been developed, and they are attractive due to simple fabrication and easy integration with electronic systems. We developed an IDC humidity sensor on a glass-epoxy substrate (FR4) using a standard commercial printed circuit board (PCB) production process. Without additional sensitive layer, the sensor production is simple. The sensor design was explored by varying electrode width. Calibration was performed in a self-constructed chamber over a relative humidity range from 15% to 90%. The IDC sensor was benchmarked against a standard humidity measurement instrument. The IDC capacitance showed a linear correlation with relative humidity, with a correlation coefficient of at least 0.98. With the finest track and spacing size of 0.254 mm achievable via commercial PCB manufacturing and a sensor footprint of 10×10 mm, the capacitance falls in the pF range, compatible with most available electronic devices. The sensitivity of the developed sensors is 2.361×10-4, 2.361×10-4, 2.361×10-4 picofarads for a track width of 0.254 mm, 0.3048 mm and 0.3556 mm respectively. These results indicate that mass production of IDC humidity sensors could be achieved at a low cost. The combination of small feature sizes and a compact sensor footprint support practical integration into existing electronic systems.
Co-Authors Achmad Nurul Fauzie Adin Okta Triqadafi Agus Naba Akhmad Sabarudin Akhmad Sabarudin Aldi Dwi Putra Aprilia Nur Tasfiyati Arinto Yudi Ponco Wardoyo Cahyo Prayogo, Cahyo Denda Dewatama Didik Rahadi Santosa Didik Rahadi Santoso Didik Suprayogo Eko Malis Elsa Hedya Kusumaningtyas Elvina Dhiaul Iftitah Erni Yudaningtyas Farida Wahyuni Fauzi, Muhammad Rifqi Fenny Irawati Hari Arief Dharmawan Hariyadi Soetedjo Heru Nurwarsito Irma Azizah Jessica Alfa Aini Lalu Sahrul Hudha Layli Amaliya M. Yogi Riyantama Isjoni Masruroh Masruroh Masruroh MASRUROH Mudjirahardjo, Panca Muhammad Fauzan Edy Purnomo MUHAMMAD ULIN NUHA Muttaqin, Adharul Nalle, Ferry Chrismiadi Novanto Yudistira Nur Chabibah Oakley, Simon Rahmadwati Rizal Y Aji Saputra, Aditya Ilham Shania Rachmi Sigit Kurniawan Sri Sugiarti Sukma Wahyu Fitriani, Sukma Wahyu Triswantoro Putro Umi Salamah Unggul P. Juswono Unggul Punjung Juswono Wayan Firdaus Mahmudy