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All Journal Catha Saintifica
Sri Jumini
Physics Education Study Program, Faculty of Tarbiyah and Teacher Training, Universitas Sains Al-Qur’an, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Energy Industrial & Manufacturing Engineering

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Alat Pemintal Sabut Kelapa Berbasis Kecepatan S Sefiyuchanna; Mukhamad Fauzi; Sri Jumini
CATHA SAINTIFICA Vol 3 No 2 (2025): November 2025 Article-in-Press
Publisher : Center for Intellectual Property and Technology Innovation, Universitas Sains Al-Qur'an

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/cathasaintifica.v3i2.9297

Abstract

The accumulation of coconut fiber waste and limited spinning technology causes the rope production process to remain slow and have low economic value for small business owners. This study aims to design a coconut fiber spinning tool based on speed control and analyze the effect of electrical power on the rope length and rotations per minute (RPM) produced. The research method uses an experimental approach with stages of tool design, assembly, testing, and performance evaluation gradually following the waterfall flow. Tests were carried out with power variations of 30 W, 35 W, 40 W, and 45 W at a constant spinning time of 60 seconds, then the RPM value and the resulting rope length were measured. The results showed a directly proportional relationship between power, RPM, and rope length. At 30 W power, the RPM was obtained at 32 with a rope length of 1.72 meters, while at 45 W power, the RPM increased to 72 and the rope length reached 2.94 meters. Increasing power increases the dynamo rotation speed and the effectiveness of the winding process, so that production capacity increases at the same time. 
Transformasi Limbah Bambu Cendani menjadi Casing Ponsel Estetik Bergaya Etnik-Modern sebagai Upaya Mengangkat Produk Lokal melalui Inovasi Berkelanjutan Mila Ariyani; Rifatun Hasanah; Y Yazid; Sri Jumini
CATHA SAINTIFICA Vol 3 No 2 (2025): November 2025 Article-in-Press
Publisher : Center for Intellectual Property and Technology Innovation, Universitas Sains Al-Qur'an

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/cathasaintifica.v3i2.10271

Abstract

The increasing public awareness of environmentally friendly products has driven the demand for mobile phone accessories that are not only functional but also have aesthetic value and cultural identity. This research aims to produce an innovative eco-friendly mobile phone casing product called CENDARIA, which combines ethnic-modern style with the use of cendani bamboo waste as the main material. The methods used include identifying potential local raw materials, designing ethnic-modern designs, prototyping, product quality testing, and disseminating the development results. The results show that cendani bamboo waste can be processed into a mobile phone casing with adequate structural strength, a unique visual appearance, and high aesthetic value, making it a competitive alternative to plastic casings. This innovation proves that the transformation of local waste can produce value-added products that support environmental sustainability while strengthening cultural identity. CENDARIA has an economic impact by creating business opportunities for local craftsmen and providing environmentally friendly product choices for consumers. CENDARIA can be a model for developing creative products based on local resources that contribute to waste reduction, economic empowerment, and a sustainable lifestyle.
Co-Authors Mila Ariyani Mukhamad Fauzi Rifatun Hasanah S Sefiyuchanna Y Yazid