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All Journal Jurnal Pengolahan dan Bioteknologi Hasil Perikanan Imajinasi Jurnal Teknik Mesin Jurnal Teknik Mesin Cakram Piston: Journal of Technical Engineering Jurnal Jendela Inovasi Daerah Buletin Peternakan Tropis (Bulletin of Tropical Animal Science) Unram Journal of Community Service (UJCS) QiST: Journal of Quran and Tafseer Studies JIPTEK Journal of International Multidisciplinary Research Strength : Jurnal Penelitian Teknik Mesin Sultra Journal of Mechanical Engineering
Nur Rohmat
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Other

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Journal : Piston: Journal of Technical Engineering

 1 
System Circuit Analysis of Solar Panel Chicken Egg Incubator Sulanjari; Wicaksana, Ilyas Rasyid; Simbolon, Kiki Tristiawanti; Setyowati, Agustina Dyah; Rohmat, Nur; Irawan, Ade
Piston: Journal of Technical Engineering Vol. 9 No. 1 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v9i1.49755

Abstract

The chicken egg incubator is an innovation in the method of hatching chicken eggs that has higher efficiency and is up-to-date compared to using incubating hens. With this incubator machine, the incubation process of chicken eggs can be controlled and can reach the ideal temperature and humidity for the hatching process of chicken eggs. This research was conducted to find out how much power is used by this chicken egg incubator machine, as well as how long it takes for 300 Wp solar panels to charge a battery with a capacity of 12 V / 80 Ah. The research was conducted to find out the percentage of success of this egg hatching and to calculate how long it takes to reach the BEP (Break Even Point). This chicken egg incubator machine is powered by a 300 Wp solar panel with a 12 V / 80 Ah battery. In the incubator circuit there is a humidifier mist maker component to maintain the incubator humidity at 50%–60%. Lighting uses 2 incandescent lamps with a total power of 50 W, as well as a ventilation fan that turns on when the temperature in the incubator is excessive in order to keep the temperature at 36 ℃–38.5 ℃. The drive motor is set to move for 3 seconds every 3 hours. This chicken egg incubator has a power consumption of 74.55 W with an egg hatching success rate of 86%. This chicken egg incubator takes about 500 days or 1 year and 5 months to reach its BEP (Break Even Point).
Synthesis of Graphene-Like Carbon from Coconut Shell and Electrical Conductivity Properties Rohmat, Nur; Affi, Jon; Gunawarman; Handayani, Murni; Yetri, Yuli
Piston: Journal of Technical Engineering Vol. 9 No. 2 (2026)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

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Abstract

Demand for batteries continues to increase in line with the growth of electric vehicles, while the availability of lithium in nature is limited. One alternative is the use of renewable natural materials, such as coconut shells, to produce functional carbon materials. This study aims to synthesize graphene-like carbon (GLC) from coconut shells using pyrolysis and sonication methods. The process was carried out through drying at 150–200 °C and pyrolysis at 700 °C. XRD characterization showed main peaks at 2θ ≈ 23.11° and 43.75° (150 °C/700 °C), and 23.15° and 43.38° (200 °C/700 °C), with an interlayer spacing of 0.35 nm and a shift in the C (002) peak from pure graphite, indicating the formation of nanosized graphene layers. FTIR analysis confirmed the presence of O–H, aromatic C=C, C=O, and C–O groups, indicating a hexagonal carbon framework with oxygen functionality on the surface. The Raman spectrum showed ID/IG ratios of 0.84 and 0.83, indicating structural disorder while still consistent with graphene-like characteristics. Conductivity tests showed relatively stable electrical conductivity with gradual electron energy loss at small current increases, allowing better control of electron mobility.
Co-Authors Abd. Rasyid Syamsuri Abdul Choliq Abdul Mufid Ade Irawan Ade, Ade Saputra Adria Wicaksono Agis Permana Ahmad Muhajir Aji, Ari Budi Prastya Aldi, Muhamad Arbi Dimyati arif Bayu Eko Cahyono Fajar Haetommy Farid Wazdi Fifit Astuti Gunawarman Iman, Muhamad Ismiarti, Ismiarti Jefri Purnawan Jon Affi, Jon Kusdi Prijono Lucia Rita Indrawati M Mukhlis Nasrulloh Mahmudi, Ahmad Mohammad Arif Muhammad Rio Ferdiansyah Muhammad Syahrul Muliyadi Murni Handayani Oky Supriadi Putut Har Riyadi Ratna Ibrahim Rohmad Salam, Rohmad RR. Ella Evrita Hestiandari Setiyono, Endro setyowati, agustina dyah Simbolon, Kiki Tristiawanti Siregar, Ansor Salim Suhendi Suhendi sulanjari Syaiful Arif Vikri Okta Yulianto Wahyudin, Muhammad Ali Wicaksana, Ilyas Rasyid Yamin, Muhamad Miftahul Yodhi Miftachul Hadi Yuli Yetri