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All Journal Jurnal Informatika dan Teknik Elektro Terapan Journal of Energy and Electrical Engineering (JEEE) Jurnal Pengabdian kepada Masyarakat Nusantara Serambi Engineering
Dewantara, Mahardira
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences

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Design of Sterilizer Calibration With Esp8266 Based on Internet of Things Anindyahadi, Fitri; Nugroho, Setyo Adi; Dewantara, Mahardira; Suyamto, Yuli
Journal of Energy and Electrical Engineering Vol 6, No 2: April 2025
Publisher : Teknik Elektro Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jeee.v6i2.14927

Abstract

Advancing technology demands reliable monitoring of key indicators such as temperature, a fundamental measure of heat or cold and critical wherever stable setpoints are required. Guided by Industry 4.0 principles, this study develops an Internet-of-Things (IoT) sterilizer calibration tool using an ESP8266 controller for real-time access. The device was built as planned, from component selection and casing design to the accompanying application, and supports continuous temperature observation. The IoT layer simplifies data acquisition and provides reliable, real-time monitoring via the ESP8266. Experimental evaluation shows small deviations from setpoints: at 150 °C the mean error is 0.5 °C, and at 200 °C the mean error is 0.1 °C. Testing followed the Medical Device Calibration Work Method No. 044-18 (2020) for sterilizer performance. All results remain within the permitted tolerance of ±5 °C, indicating that the tool is suitable for use and can assist applications that require stable, precisely monitored temperature conditions.
Pemanfaatan Scrap Besi untuk Reduksi Krom Heksavalen Limbah Cair Industri Pelapisan Logam Sunardi, Sunardi; Mahayana, Argoto; Sumardiyono, Sumardiyono; Gunawan, Lucia Sincu; Hidayati, Nur; Soebiyanto, Soebiyanto; Dewantara, Mahardira; Afghohani, Afif
Jurnal Pengabdian kepada Masyarakat Nusantara Vol. 6 No. 3 (2025): Edisi Juli - September
Publisher : Lembaga Dongan Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/jpkmn.v6i3.6600

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk menerapkan hasil penelitian pemanfaatan limbah scrap besi sebagai agen pereduksi kromium heksavalen (Cr(VI)) dalam limbah cair industri pelapisan logam skala kecil. Lokasi kegiatan berada di industri pelapisan logam Gemilang Chrome, Jl. Raya Palur Km. 7,5 Solo, yang belum memiliki sistem pengolahan limbah cair berbahaya secara memadai. Metode yang digunakan meliputi survei lapangan, wawancara dengan pemilik dan operator industri, pengambilan dan analisis sampel limbah, pelatihan teknologi tepat guna, serta implementasi langsung teknologi reduksi Cr(VI) menggunakan scrap besi dalam skala sederhana. Hasil kegiatan menunjukkan bahwa scrap besi mampu mereduksi kadar Cr(VI) hingga 87,5% dalam kondisi optimum pH 3 dan waktu kontak 90 menit. Selain efisiensi teknis, terjadi peningkatan pengetahuan dan keterampilan mitra dalam pengelolaan limbah berbahaya secara mandiri dan murah. Temuan ini menunjukkan bahwa scrap besi tidak hanya berfungsi sebagai agen remediasi yang efektif, tetapi juga sebagai solusi aplikatif berbasis prinsip ekonomi sirkular yang relevan untuk diterapkan pada industri pelapisan logam berskala UMKM. Kegiatan ini sekaligus membuktikan bahwa hasil riset laboratorium dapat diadaptasikan dalam konteks pengabdian masyarakat yang nyata, berkelanjutan, dan berdaya guna.
RANCANG BANGUN ALAT KALIBRATOR BLACKBODY BERBASIS ARDUINO NANO MENGGUNAKAN KONTROL PID Nugroho, Setyo Adi; Dewantara, Mahardira; Anindyahadi, Fitri
Jurnal Informatika dan Teknik Elektro Terapan Vol. 14 No. 1 (2026)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v14i1.8588

Abstract

Termometer yang digunakan secara terus menerus, terjatuh, atau terbentur dapat mengalami kerusakan hingga dapat menimbulkan dampak yang serius seperti penurunan kualitas hasil pengkurunnya. Oleh karena itu, termometer membutuhkan kegiatan kalibrasi secara berkala untuk memastikan tingkat ketelitian dan ketepatan yang dimilikinya bernilai tinggi dengan menggunakan alat kalibrator blackbody. Tujuan dari penelitian ini adalah membuat rancang bangun alat kalibrator blackbody berbasis arduino nano menggunakan kontrol PID dan melakukan penelitian tingkat keakurasian hasil pengukuran alat kalibrator blackbody berbasis arduino nano menggunakan kontrol PID. Metode yang digunakan pada penelitian ini adalah Research and Development (RnD). Metode RnD adalah salah satu metode penelitian yang digunakan untuk menghasilkan sebuah produk tertentu melalui beberapa tahapan penelitian dan pengujian efektivitas produk tersebut. Dari hasil pengujian pengukuran, nilai akurasi pada pengujian parameter setting suhu 35°C adalah 99,41%. Nilai akurasi pada pengujian parameter setting suhu 37°C adalah 99,97%. Nilai akurasi pada pengujian parameter setting suhu 41°C adalah 99,85%.
The Effect of H2SO4 Concentration on the Yield and Purity of Zinc Sulfate in the Synthesis of Zinc Sulfate from Zinc Waste , Sunardi; , Sumardiyono; Mahayana, Argoto; Hidayati, Nur; , Soebiyanto; Dewantara, Mahardira; Afghohani, Afif
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Zinc waste is a type of waste that comes from the use or production of zinc metal. Zinc waste is widely used in the production of paint, ceramics, glass, lamps, and pesticides. Zinc waste is very dangerous if not properly processed/utilized. If disposed of in large quantities into waterways, zinc waste can cause environmental pollution. Zinc waste is actually needed in water, but only in very small amounts. If the zinc content in water exceeds the specified threshold, it will be dangerous and toxic to living organisms. Excess zinc waste will damage the aquatic and soil ecosystems, which will certainly also have an impact on the health of living creatures and pose health risks to humans, such as digestive disorders and damage to certain organs. To reduce the amount of zinc waste, it is necessary to synthesize zinc waste into zinc sulfate. The purpose of this study was to determine the effect of sulfuric acid concentration on the yield and purity of zinc sulfate from zinc waste. The synthesis process includes pre-treatment, which is carried out by reducing the size of the zinc waste, then soaking the zinc waste in hydrochloric acid (HCl) to dissolve the oxide layer contained in it, cleaning the zinc surface of crusts, and separating the zinc from its mixture. Then, the synthesis process is carried out using a sulfuric acid (H2SO4) solution with varying concentrations (20%, 30%, 35%, and 45%) with heating at a temperature of 75-80° C and stirring at a speed of 300-350 rpm. Filtration is then carried out, and the filtrate obtained is heated until the solution becomes saturated, followed by a crystallization process. It is cooled to room temperature, and zinc sulfate crystals are obtained. In this study, white zinc sulfate heptahydrate (ZnSO4.7H2O) was obtained using a 45% sulfuric acid (H2SO4) solution, yielding a weight of zinc sulfate heptahydrate (ZnSO4.7H2O) of 3.1729 grams, a ZnSO4.7H2O concentration of 52.80% and the purity level of ZnSO4.7H2O was 96.28%.
Co-Authors , Soebiyanto , Sumardiyono , Sunardi Afif Afghohani, Afif Anindyahadi, Fitri Gunawan, Lucia Sincu Mahayana, Argoto Nur Hidayati Setyo Adi Nugroho Soebiyanto, Soebiyanto Sumardiyono Sumardiyono Sunardi Sunardi Suyamto, Yuli