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PEMANFAATAN TEKNOLOGI SOLAR CELL SEBAGAI SUMBER ENERGI LISTRIK ALTERNATIF DI PANTI ASUHAN AL-HASANAH Randis Randis; mahmud mahmud; Mohamad Isram; Lilik Damayanti; Asri Setiarini
Jurnal Abdi Masyarakat Vol. 3 No. 1 (2019): Jurnal Abdi Masyarakat (JAIM)
Publisher : Universitas Kadiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jaim.v3i1.538

The need for electrical energy is a basic requirement besides the need for food and clothing, electrical energy is absolutely needed by the community to support all their daily activities. The purpose of carrying out community service activities is to provide an alternative source of electrical energy by utilizing solar cell panels which can be felt by the public in the form of DC voltage and AC voltage through an inverter device. The method applied in this service activity is to set a plan in the form of a system work diagram and then carry out the service activities in accordance with the work plan that was made previously. The results obtained are the availability of lighting facilities and electrical energy to start the pump so that it can meet the lighting needs and water needs of the orphanage.

BANTUAN ALAT TRAINER KIT MIKROKONTROLLER BERBASIS ARDUINO GUNA PENINGKATAN KEMAMPUAN BELAJAR BAGI SISWA DI PONDOK PESANTREN AL-MUJAHIDIN KM. 10 BALIKPAPAN Randis Randis; Hadi Hermansyah; Yudi Kurniawan; Eelizabeth Milaningrum
Jurnal Abdi Masyarakat Vol. 4 No. 1 (2020): Jurnal Abdi Masyarakat November 2020
Publisher : Universitas Kadiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jaim.v4i1.1354

ABSTRACT The partner community in the implementation of this community service is Pondok PesantrenAl-Mujahidin Km.10, Balikpapan. The aids service that have been given to this communityservices are module and trainer kit based on arduiono and also programming training withmikrokontroler. The process of this community service started with the designed the tools of the trainer KIT, then made trainer kit and learning module in order to make students easierlearning independently, and the last step was giving this tools for partner community that isthe head of Pondok Pesantrem Al-Mujahidin Km.10 Balikpapan. After that, did an evaluationto know the successful of this activity. In the preliminary of this community service, it will beheld the training for boarding students, however because of pandemic covid 19 which isstudents still off until the end of the year therefore the training was cancelled. Keywords: Pondok Pesantren Al-Mujahidin Balikpapan, trainer kit based on arduiono,mikrokontroler ABSTRAK Masyarakat mitra dalam pelaksanaan program Pengabdian Kepada Masyarakat ini yaituPondok Pesantren Al-Mujahidin Km. 10 Balikpapan. Bantuan yang diberikan kepadamasyarakat mitra yaitu pemberian berupa modul dan trainer kit berbasis arduino pelatihanpemrograman dengan mikrokontroller dan. Langkah pelaksanaan dengan perancangan alattrainer kit, selanjutnya membuat trainer kit serta modul pembelajaran untuk memudahkansiswa dalam belajar mandiri dan tahapan terakhir dilakukan serah terima alat kepadamasyarakat mitra dalam hal ini pimpinan Pondok Pesantren Al-Mujahidin Km. 10 Balikpapanserta dilakukan evaluasi untuk mengetahui keberhasilan dari kegiatan ini. Rancangan awalkegiatan PKM ini juga akan melakukan kegiatan pelatihan terhadap siswa pesantren namunkarena kondisi pandemi covid-19 dimana siswa masih sementara diliburkan sampai akhirtahun sehingga kegiatan pelatihan ini ditiadakan. Kata kunci: Pondok Pesantren Al-Mujahidin Balikpapan, trainer kit berbasis arduino,mikrokontroller

Implementasi Sistem Alat Ukur Coolant dan Oil Engine Pada Unit Alat Berat Berbasis Mikrokontroller Terintegrasi Data Logger Randis; Syaeful Akbar; Syahruddin
Majalah Teknik Industri Vol 27 No 2 (2019): Majalah Teknik Industri Desember 2019
Publisher : Unit Penelitian dan Pengabdian Masyarakat (UPPM) Politeknik ATI Makassar

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

Temperatur pada pendingin dan engine oli dapat mengindikasikan temperatur mesin oleh karena itu, perlu dilakukan pemantauan suhu mesin untuk meenghindari overheating pada mesin yang dapat menyebabkan kerusakan pada komponen mesin secara keseluruhan. Tujuan dari penelitian ini adalah melakukan perancangan dan membuat serta mengaplikasikan alat ukur suhu pada coolant dan oli mesin pada unit alat berat yang terintegrasi pada data logger. Pada penelitian ini, telah dilakukan perancangan system electrical dengan mengacu pada diagram blok dan flow chart system untuk membuat alogaritma program guna menjalankan sistem agar dapat bekerja sesuai dengan yang diharapkan. Hasil penelitian menujukkan alat dapat bekerja dengan baik untuk melakukan monitoring suhu dengan menggunakan 2 buah sensor suhu DS18B20 serta menyimpan data hasil pembacaan dalam SD card dalam format file text (*.txt). serta dapat di plot dalam bentuk grafik dengn menggunakan software pengolah data dan grafik. Dari grafik yang diperoleh menunjukkan karakteristik data sama dengan prinsip pendinginan pada mesin dengan termostat yang berfungsi dengan baik.

Experimental and Numerical Investigation of Fiber Direction on The Vibration Properties of Ananas Comosus Leaf Reinforced Epoxy Composite Beams Syaiful Syaiful; Randis Randis
Journal of Fibers and Polymer Composites Vol. 2 No. 2 (2023): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v2i2.74

Technological evolution and environmental awareness have driven the improvement of quality and renewable products, especially in natural fiber-reinforced composites. This study aims to analyze the stiffness and personal frequency of ACL fiber-reinforced composite beams due to the influence of the fiber direction. Next, compare experimental values with numerical. Composite beams are produced by varying the direction of the fibers 0°/0°/0°, -45°/0°/45° and -90°/0°/90° then supported by a simple support (clamp-roll). The exciter position is placed at 0-50 cm along the composite beam, then determine the value of stiffness and vibration behavior experimentally and numerically. This research indicates an increase in the stiffness and personal frequency of composite beams in the fiber direction 0°/0°/0°. The experimental values are also greater when compared to the values obtained numerically. These findings make it possible to use ACL fiber to manufacture composite beams with vibration-enabled characteristics for various applications in engineering materials subject to vibrational forces

Implementation of fuzzy logic control for the automation of diesel engine cooling systems Randis Randis; Sri Susilawati Islam; Nur yanti; Novita Novita
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3359

Conventional cooling systems on four-wheeled vehicles generally use a cooling fan driven by the crankshaft through pulleys and a belt (V-belt), causing the wastage of fuel in the vehicle. This study aims to design and implement fuzzy logic control on a prototype of an automatic cooling system for a diesel engine. The tool's design uses the experimental method, uses Arduino as a microcontroller that functions as a data processing center, with inputs of two temperature sensors and a DC motor as output to rotate the fan, and fuzzy logic control methods as an automatic control system. The research results show that this tool can operate automatically according to the engine temperature, so it is expected to produce greater effectiveness and efficiency. Measurements on each component have been carried out and show satisfactory results, testing on the temperature sensor shows a small error. Comprehensive testing of the tool shows good performance, including the PWM output to adjust the rotational speed of the fan motor so that the system can be used properly. This research will help create a prototype of an automatic cooling system for a diesel engine cooling system so that it can be developed to reveal better fuel efficiency in the future.

PREPARATION AND CHARACTERIZATION OF MICROCRYSTALLINE CELLULOSE FROM OIL PALM FROND BY CHEMICAL AND MECHANICAL TREATMENT Randis, Randis; Darmadi , Djarot B.; Gapsari , Femiana; Sonief , Achmad As’Ad; Rus , Tatag Yufitra
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.8

Oil palm fronds are currently an underutilised by product of plantations. The micro and nano cellulose can be utilised to create new goods, such as being used as a filler in environmentally friendly degradable composites. This study examined the process of extracting oil palm frond fiber (OPFF) by using a series of chemical and mechanical treatments to get pure microcrystalline cellulose (MCC). The MCC obtained by OPFF was subsequently analysed in further detail. The identification of morphological analysis, presence of functional groups, and crystallinity index were conducted using Scanning Electron Microscopy (SEM), Fourier Transform InfraRed (FTIR) and X-Ray Difraction (XRD) techniques. The findings revealed the presence of microcrystalline structures in OPF fibers, having a mean measurement of width 3.2 ± 0.42 ?m. The application of FTIR verified that the elimination of noncellulosic constituents from the treated OPF fibers had achieved its utmost level. Simultaneously, X-ray diffraction research revealed that the utilization of chemical procedures resulted the formation of a characteristic cellulose crystal structure and an augmentation in the crystallinity index. However, the mechanical treatment resulted in a minor drop in the crystalline index. This can be ascribed to the disturbance of cellulose chains and the crystal structure within the cellulose fibers. The cellulose obtained from raw fibers and subsequent processing exists in a very pure form, specifically in the cellulose I? structure. This enables its utilization as reinforcement in eco-friendly MCC-based green composites, offering numerous benefits.

PREPARATION AND CHARACTERIZATION OF MICROCRYSTALLINE CELLULOSE FROM OIL PALM FROND BY CHEMICAL AND MECHANICAL TREATMENT Randis, Randis; Darmadi , Djarot B.; Gapsari , Femiana; Sonief , Achmad As’Ad; Rus , Tatag Yufitra
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.8

Oil palm fronds are currently an underutilised by product of plantations. The micro and nano cellulose can be utilised to create new goods, such as being used as a filler in environmentally friendly degradable composites. This study examined the process of extracting oil palm frond fiber (OPFF) by using a series of chemical and mechanical treatments to get pure microcrystalline cellulose (MCC). The MCC obtained by OPFF was subsequently analysed in further detail. The identification of morphological analysis, presence of functional groups, and crystallinity index were conducted using Scanning Electron Microscopy (SEM), Fourier Transform InfraRed (FTIR) and X-Ray Difraction (XRD) techniques. The findings revealed the presence of microcrystalline structures in OPF fibers, having a mean measurement of width 3.2 ± 0.42 ?m. The application of FTIR verified that the elimination of noncellulosic constituents from the treated OPF fibers had achieved its utmost level. Simultaneously, X-ray diffraction research revealed that the utilization of chemical procedures resulted the formation of a characteristic cellulose crystal structure and an augmentation in the crystallinity index. However, the mechanical treatment resulted in a minor drop in the crystalline index. This can be ascribed to the disturbance of cellulose chains and the crystal structure within the cellulose fibers. The cellulose obtained from raw fibers and subsequent processing exists in a very pure form, specifically in the cellulose I? structure. This enables its utilization as reinforcement in eco-friendly MCC-based green composites, offering numerous benefits.

Perbandingan trajectory tracking pada prototype excavator sistem pneumatic dengan sistem kontrol menggunakan joystick dan smartphone android Randis, Randis; Aditya, Angga Wahyu
TURBO [Tulisan Riset Berbasis Online] Vol 8, No 2 (2019): Jurnal Turbo Desember 2019
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v8i2.1031

Trajectory tracking testing is mostly implemented both on vehicles, mobile robots, flying robots, and excavators to generate a small value of trajectory tracking to effectiveness and efficiency by the tasks and functions of each unit or product. This study aims to compare trajectory tracking on pneumatic excavator units with a manual control system with a joystick and a remote control system using an Android smartphone. Two tracks are used where the first track uses combine straight and radius shapes and the second track combines horizontal and vertical lines that form an angle of 90º. The results showed the use of remote control using an Android smartphone still has a higher trajectory tracking error when compared to manual control with a joystick even though on average the error results obtained are small, so more remote control is needed. Keywords: Pneumatic excavator system, joystick control system, remote control system, error trajectory tracking.Situs barbarslot terpercaya dengan berbagai pilihan permainan seru, peluang menang besar, dan fitur bonus menarik. Nikmati pengalaman bermain aman dan menyenangkan kapan saja!

Pengaruh Perlakuan Kimia dan Enzimatis terhadap Sifat Mekanik Serat Pelepah Kelapa Sawit untuk Aplikasi Komposit Berkelanjutan Randis, Randis; Hermansyah, Hadi; Syahruddin, Syahruddin; Arwin, Arwin; M. Sumartono, Yolanda Vivina
Jurnal Teknologi Terpadu Vol 13, No 2 (2025): JTT (Jurnal Terpadu Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v13i2.2740

Studi ini secara komprehensif mengevaluasi pengaruh perlakuan kimia (NaOH dan H₂O₂) serta enzimatis (bromelain dan papain) terhadap sifat mekanik serat pelepah kelapa sawit (SPKS) dalam kerangka pengembangan komposit berkelanjutan. Serat hasil ekstraksi dianalisis untuk mengidentifikasi perubahan diameter, kekuatan tarik, dan modulus elastisitas setelah perlakuan. Hasil penelitian menunjukkan bahwa perlakuan NaOH memberikan efek paling signifikan, ditandai dengan penyusutan diameter hingga 46% (0,4605 mm), peningkatan kekuatan tarik hingga 209,050 MPa, serta kenaikan modulus elastisitas menjadi 3,575 GPa. Sebaliknya, perlakuan H₂O₂ hanya menghasilkan perbaikan terbatas, sementara perlakuan enzimatis menunjukkan kontribusi moderat. Papain memberikan hasil lebih baik dibandingkan bromelain, dengan kekuatan tarik 86,231 MPa dan modulus 2,261 GPa, meskipun efektivitasnya masih jauh di bawah NaOH. Temuan ini menegaskan bahwa perlakuan alkali tetap menjadi pendekatan paling efektif untuk meningkatkan sifat mekanik serat alam, sedangkan perlakuan enzimatis lebih tepat diposisikan sebagai metode pelengkap yang ramah lingkungan. Secara keseluruhan, penelitian ini menekankan pentingnya strategi optimasi perlakuan serat untuk memperbaiki rasio aspek, memperkuat adhesi serat–matriks, dan meningkatkan performa mekanik komposit berbasis serat alam.

Enhanced structural and thermal properties of oil palm frond fiber-derived nanocellulose using chemical and mechanical treatments for eco-friendly composites Randis, Randis; Gapsari, Femiana
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6270

This study investigates the extraction and characterization of Cellulose Nanofibrils (CNFs) from Oil Palm Frond Fibers (OPFFs) using a combined chemical and mechanical treatment approach. Alkali treatment and bleaching effectively removed non-cellulosic components, increasing the Crystallinity Index (CI) from 58.75% in untreated OPFFs to 73.09% in Chemically Treated Microfibrillated cellulose (CMFs). Subsequent ultrafine grinding further enhanced the CI to 81.93%, demonstrating high purity and improved structural integrity. Thermogravimetric Analysis (TGA) revealed enhanced thermal stability, with the maximum degradation temperature rising from 286°C in OPFFs to 339°C in CNFs. X-ray Diffraction (XRD) analysis confirmed the retention of the cellulose of crystalline structure after all treatments. The novelty of this study lies in the systematic valorization of oil palm frond fibers, an abundant agricultural waste in Indonesia, through an integrated chemical-mechanical process to produce high-performance nanocellulose. These findings demonstrated that OPF-derived CNFs possess superior structural and thermal properties, making them strong candidates for reinforcing eco-friendly polymer composites in sustainable material applications

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