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Analisa Beban Penekanan Hidrolis Terhadap Kekerasan Komposit Resin Epoksi Berpenguat Serbuk Kulit Jagung dan Fly Ash Menggunakan Metode Compression Molding Mirza Pramudia; Teguh Prasetyo; Rifky Maulana Yusron; Mohammad Safiudin
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2153

Using fly ash and natural fibers as environmentally friendly composite materials is expected to reduce the negative impact of fly ash as industrial waste, turning it into a material with added value. One of the methods in composite manufacturing is the compression molding method. This research aims to analyze the influence of compaction loading variations on the hardness values of epoxy composites reinforced with corn husk-fly ash powder. The research begins with producing composite specimens containing corn husk powder (20% wt) and fly ash (10% wt). The specimens are pressed with compaction loading variations of 1 ton, 2 tons, 3 tons, and 4 tons. The specimens from the compression molding are then subjected to sintering treatment at 150°C for 1 hour, followed by Shore D hardness testing. The results show that the composite material's hardness increases with the compaction loading. The highest hardness is achieved at a compaction load of 4 tons with a hardness value of 80.3 SHD. The compaction process of the composite material produces a fly ash structure that undergoes agglomeration or structural densification. This phenomenon results in an increase in the hardness of the material along with an increase in the compaction loading.

Analisis Kekuatan Bending Material Komposit Fiber Metal Laminate Serat Kulit Jagung Bermatriks Polyester Mirza Pramudia; Teguh Prasetyo; Mustafa
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2343

Corn husks contain a significant amount of cellulose, which contributes to enhancing mechanical properties as a reinforcing material in composites, including FML composites. Several studies on composites have shown that corn husk fibers can significantly improve bending strength due to cellulose's strong microfibril structure, which enhances the material's strength and rigidity. In this study, corn husk fibers are used as reinforcement to investigate the effect of varying fiber volume fractions on the bending strength of polyester matrix FML composites. The method employed is hand lay-up, with the composite structure consisting of 1100 aluminum skin, woven roving fiberglass fibers, and natural corn husk fibers. The volume fraction variations used are 5%, 15%, 25%, and 35%. Test results show that bending strength increases with the increase in corn husk fiber volume fraction but decreases at a 35% volume fraction. The highest bending strength is achieved at a 25% corn husk fiber volume fraction, with a value of 108.84 MPa.

Perancangan Solar Tracker Four Axis Berbasis Internet of Things (IoT) ALFITA, RIZA; IBADILLAH, ACHMAD FIQHI; RAHMAWATI, DIANA; KUSUMA, M.KURNIAWAN HADI; KURIAWAN, ADI; NAHARI, ROSIDA VIVIN; PRAMUDIA, MIRZA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 8, No 2: Published May 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v8i2.404

ABSTRAKPanel surya merupakan energi terbarukan yang menjadi solusi untuk masa depan. Tetapi efisiensi menjadi masalah tersendiri pada panel surya, dengan efisiensi yang rendah mengakibatkan daya yang dihasilkan kecil dan tidak sebanding dengan harga yang dikeluarkan. Pada penelitian ini dilakukan perancangan untuk meningkatkan efisiensi panel surya ke titik maksimal dengan berbagai fitur yaitu sistem tracking, cermin reflector dan monitoring IoT. Sistem ini menggunakan sensor Light Dependent Resistor (LDR) yang digunakan untuk mendeteksi intensitas cahaya dan dilengkapi juga motor penggerak untuk mengatur sudut elevasi, cermin reflector sebagai pemantul cahaya, dan IoT untuk monitoring jarak jauh. Hasil penelitian menunjukkan bahwa penggunaan cermin reflector mampu meningkatkan daya pada siang hari tetapi turun ketika pagi dan sore hari, sedangkan sistem tracking mampu memproduksi daya lebih baik pada waktu kapanpun.Kata kunci: panel surya, sensor, reflektorÂ ABSTRACTSolar panels are renewable energy which is the solution for the future. But efficiency is a problem in solar panels, with low efficiency resulting in small power generated and not worth the price incurred. In this research, the design is carried out to increase the efficiency of solar panels to the maximum point with various features, namely the tracking system, mirror reflector, and IoT monitoring. This system uses an LDR sensor that is used to detect light intensity and is also equipped with a motor to adjust the elevation angle, reflector mirror as a reflection of light, and IoT for remote monitoring. The results showed that the use of reflector mirrors can increase power during the day but go down in the morning and evening, while the tracking system is able to produce better power at any time. Keywords: Solar panels, sensor, reflector

Pelatihan digital marketing untuk UMKM batik Alfita, Riza; Nahari, Rosida Vivin; Pramudia, Mirza; Kartika, Kartika
Masyarakat Berdaya dan Inovasi Vol. 5 No. 2 (2024)
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/mayadani.v5i2.225

Sentra UMKM Perajin batik kebon alam ecoprint Surabaya merupakan salah satu UMKM yang memproduksi berbagai macam pakaian, tas dompet, sepatu hingga case hand sanitizer yang memakai pewarnaan alami dari tumbuhan seperti kunyit untuk warna kuning, kelengkeng untuk warna orange, daun mangga untuk warna hijau dan lain sebagainya, selain produk berbasis kain, UMKM ini juga memproduksi sepatu, tas berbahan dasar motif batik yang diaplikasikan pada kulit domba, Urgensi pengabdian kepada masyarakat ini dilakukan untuk meningkatkan pengetahuan peserta pengabdian di dua bidang yaitu bidang manajemen yang memungkinkan mitra perlu adanya pengelolaan data terkait stok barang, data pelanggan, update stok batik dan pengecekan stok batik, yang kedua yaitu peningkatan pengetahuan peserta pengabdian masyarakat di sektor digital marketing dan pembuatan aplikasi digital marketing berbasis android, pelatihan dan pendampingan ini tidak hanya sebatas memberikan pelatihan keterampilan teknis, tetapi juga mencakup peningkatan pengetahuan dalam berbagai aspek yang dapat mendukung keberlangsungan dan perkembangan usaha. Target pengabdian ini yaitu peningkatan pengetahuan peserta pengabdian terhadap pemasaran secara online, peningkatan manajemen usaha melalui manajemen keuangan dan pengetahuan di bidang teknologi informasi.

Rancang Bangun Automatic Transfer Switch (ATS) - Automatic Main Failure (AMF) Untuk Otomatisasi Genset Berbasis Mikrokontroller Menggunakan Metode Fault Tolerance Dikhyak Falakhul Akmal, M.; Alfita, Riza; Ulum, Miftachul; Haryanto, Haryanto; Pramudia, Mirza; Vivin Nahari, Rosida
Jurnal FORTECH Vol. 2 No. 2 (2021): Jurnal FORTECH
Publisher : FORTEI (Forum Pendidikan Tinggi Teknik Elektro Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56795/fortech.v2i2.205

Often electronic equipment is damaged due to a sudden power outage. This often happens due to uncertain natural conditions, forcing PLN to carry out maintenance on its electricity distribution equipment. In addition, many electrical equipment can be damaged by sudden power outages. To be able to overcome this, people usually use generator to overcome supply failures manually. Based on this background, the author created an Automatic Transfer Switch (ATS) – Automatic Main Faillure (AMF) based on the STM32F103C8T6 microcontroller which is applied to generators when there is a power outage. The ATS – AMF device is made using Relays, PZEM004T Voltage Sensors, magnetic contactors, Miniature Circuit Breakers, stepdown circuits, LCD TFT and STM32F103C8T6 as control systems. This system uses the Fault Tolerance method so that the system can continue to run even if there is damage to the main battery by adding a backup battery as a backup. The results of this study, the Automatic Transfer Switch (ATS) circuit found that the average time needed for the generator to start is 2.5 seconds and the time needed for the generator to produce a stable voltage is 5.7 seconds, thus this time is used as the author's reference in determining the right time to switch the load on the microcontroller so that the load is not damaged due to unstable generator voltage. Whereas in the Automatic Main Failure (AMF) it was found that the Stepdown circuit used to detect whether or not PLN electricity was very responsive because the stepdown circuit was installed in parallel at the PLN source and can be proven by the results in the Arduino application.

Rancang Bangun Timbangan Buah Digital Menggunakan Metode YOLO Evita, Clarisna; Alfita, Riza; Haryanto, Haryanto; Vivin Nahari, Rosida; Ulum, Miftachul; Pramudia, Mirza
Jurnal FORTECH Vol. 3 No. 1 (2022): Jurnal FORTECH
Publisher : FORTEI (Forum Pendidikan Tinggi Teknik Elektro Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56795/fortech.v3i1.105

The rapid development of technology has created various conveniences in all aspects of human life. One of the fields of technology that is rapidly developing is the world of electronics, which demands digitization to facilitate human activities. For example in the field of trade, humans want a process that is practical and easy. Weight measurement is one of the problems that hinders the trading process, because it is still done manually and is less efficient. The purpose of making a design of automatic digital scales based on fruit images using the yolo method (you only look once) is to determine the type and weight of fruit using a Load Cell sensor simultaneously and accurately. The working principle of this tool is the first, the detection of fruit types is processed by a USB Webcam by taking video from the Webcam and then processing it using the Yolo method to identify the type of fruit. The second stage is input from the Load Cell sensor sending object data read to the Raspberry Pi as the main controller. to determine the weight of the fruit, then the last stage is displayed on the LCD and the results can be printed out as proof of purchase receipt. From the LCD directly displays output in the form of price, weight and type of object being weighed. The Yolo method can detect objects and colors and has high detection speed and accuracy.

Analisa Beban Penekanan Hidrolis Terhadap Kekerasan Komposit Resin Epoksi Berpenguat Serbuk Kulit Jagung dan Fly Ash Menggunakan Metode Compression Molding Pramudia, Mirza; Prasetyo, Teguh; Maulana Yusron, Rifky; Safiudin, Mohammad
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2153

Using fly ash and natural fibers as environmentally friendly composite materials is expected to reduce the negative impact of fly ash as industrial waste, turning it into a material with added value. One of the methods in composite manufacturing is the compression molding method. This research aims to analyze the influence of compaction loading variations on the hardness values of epoxy composites reinforced with corn husk-fly ash powder. The research begins with producing composite specimens containing corn husk powder (20% wt) and fly ash (10% wt). The specimens are pressed with compaction loading variations of 1 ton, 2 tons, 3 tons, and 4 tons. The specimens from the compression molding are then subjected to sintering treatment at 150Â°C for 1 hour, followed by Shore D hardness testing. The results show that the composite material's hardness increases with the compaction loading. The highest hardness is achieved at a compaction load of 4 tons with a hardness value of 80.3 SHD. The compaction process of the composite material produces a fly ash structure that undergoes agglomeration or structural densification. This phenomenon results in an increase in the hardness of the material along with an increase in the compaction loading.

Analisis Kekuatan Bending Material Komposit Fiber Metal Laminate Serat Kulit Jagung Bermatriks Polyester Pramudia, Mirza; Prasetyo, Teguh; Mustafa
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2343

Corn husks contain a significant amount of cellulose, which contributes to enhancing mechanical properties as a reinforcing material in composites, including FML composites. Several studies on composites have shown that corn husk fibers can significantly improve bending strength due to cellulose's strong microfibril structure, which enhances the material's strength and rigidity. In this study, corn husk fibers are used as reinforcement to investigate the effect of varying fiber volume fractions on the bending strength of polyester matrix FML composites. The method employed is hand lay-up, with the composite structure consisting of 1100 aluminum skin, woven roving fiberglass fibers, and natural corn husk fibers. The volume fraction variations used are 5%, 15%, 25%, and 35%. Test results show that bending strength increases with the increase in corn husk fiber volume fraction but decreases at a 35% volume fraction. The highest bending strength is achieved at a 25% corn husk fiber volume fraction, with a value of 108.84 MPa.

ANALISIS VARIASI INFILL PATTERN TERHADAP KEKUATAN TARIK MATERIAL KOMPOSIT SANDWICH BERLAPIS SERAT KARBON Pramudia, Mirza; Mubarok, Khamdi; Murodah, Nailatul
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2134

Fused Deposition Modeling (FDM) technology plays a significant role in fabricating the core of sandwich composite structures due to its capability to manufacture complex geometries with various infill patterns, enabling the optimization of lightweight and high-strength structures. This study aims to investigate the influence of infill pattern variations on the tensile properties of sandwich composites composed of a PLA core and carbon fiber skins using the hand lay-up method. The infill patterns employed include cubic, gyroid, grid, and honeycomb, each with an infill density of 20%. Specimens were fabricated and assembled according to ASTM D3039 standards, followed by tensile testing to evaluate ultimate tensile strength, elastic modulus, and fracture behavior. The results indicate that the honeycomb pattern achieved the highest tensile strength of 49.85 MPa and stiffness of 1045 MPa, followed by grid (47.44 MPa; 1033 MPa), gyroid (44.75 MPa; 946 MPa), and cubic (43.46 MPa; 945 MPa), establishing honeycomb as the most optimal infill pattern for enhancing mechanical performance.

Rancang Bangun Automatic Transfer Switch (ATS) - Automatic Main Failure (AMF) Untuk Otomatisasi Genset Berbasis Mikrokontroller Menggunakan Metode Fault Tolerance Dikhyak Falakhul Akmal, M.; Alfita, Riza; Ulum, Miftachul; Haryanto, Haryanto; Pramudia, Mirza; Vivin Nahari, Rosida
Jurnal FORTECH Vol. 2 No. 2 (2021): Jurnal FORTECH
Publisher : FORTEI (Forum Pendidikan Tinggi Teknik Elektro Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56795/fortech.v2i2.205

Often electronic equipment is damaged due to a sudden power outage. This often happens due to uncertain natural conditions, forcing PLN to carry out maintenance on its electricity distribution equipment. In addition, many electrical equipment can be damaged by sudden power outages. To be able to overcome this, people usually use generator to overcome supply failures manually. Based on this background, the author created an Automatic Transfer Switch (ATS) – Automatic Main Faillure (AMF) based on the STM32F103C8T6 microcontroller which is applied to generators when there is a power outage. The ATS – AMF device is made using Relays, PZEM004T Voltage Sensors, magnetic contactors, Miniature Circuit Breakers, stepdown circuits, LCD TFT and STM32F103C8T6 as control systems. This system uses the Fault Tolerance method so that the system can continue to run even if there is damage to the main battery by adding a backup battery as a backup. The results of this study, the Automatic Transfer Switch (ATS) circuit found that the average time needed for the generator to start is 2.5 seconds and the time needed for the generator to produce a stable voltage is 5.7 seconds, thus this time is used as the author's reference in determining the right time to switch the load on the microcontroller so that the load is not damaged due to unstable generator voltage. Whereas in the Automatic Main Failure (AMF) it was found that the Stepdown circuit used to detect whether or not PLN electricity was very responsive because the stepdown circuit was installed in parallel at the PLN source and can be proven by the results in the Arduino application.

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