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I Ketut Putra
Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana
Astronomy Physics Other

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Perancangan Generator Ultrasonik Untuk Membunuh Bakteri Escherichia coli (E. coli) I Made Satriya Wibawa; I Ketut Putra
Kappa Journal Vol 6 No 2 (2022): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v6i2.6886

Abstract

Telah dirancang generator ultrasonik sebagai pembunuh bakteri Escherichia coli (E. coli). Range frekuensi yang dihasilkan oleh generator ultrasonik ini berkisar antara 50 kHz - 65 kHz. Dari hasil pengamatan kematian bakteri E. coli yang ditimbulkan akibat radiasi gelombang ultrasonik terhadap variasi jarak dan frekuensi yang digunakan pada kerapatan 10-8 cfu/ml (coloni forming unit/ml) diperoleh persentase rata-rata kematian bakteri E. coli yang ditimbulkan meningkat apabila jarak radiasi semakin dekat dan frekuensi yang digunakan tinggi.  Bakteri E. coli setelah diradiasi dengan gelombang ultrasonik mengalami kelainan sel yaitu terjadi pengecilan bentuk sel, dinding selnya pecah dan mengalami lysis.
Perancangan Alat Ukur Intensitas Cahaya menggunakan Sensor BH1750 Berbasis Mikrokontroler ATMega328P Tominikus Benyamin Bano; I Gusti Agung Widagda; Ni Luh Putu Trisnawati; I Made Satriya Wibawa; I Ketut Putra; I Nengah Sandi
Kappa Journal Vol 8 No 1 (2024): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i1.24917

Abstract

The design of a light intensity measuring instrument using the BH1750 sensor based on the ATMega328P microcontroller has been successfully created. The results of light intensity data are measured by using the BH1750 sensor which receives a data signal in the form of light intensity. In order to get results that are in accordance with the reference tool, the design of a light intensity measuring instrument by using the BH1750 sensor based on the ATmega328P microcontroller is carried out in the Electronics and Instrumentation Laboratory and Computing Laboratory, Physics Study Program, FMIPA, Udayana University, Jimbaran, Bali. Then the results of the design of tool and reference tool processed into graphical form and proven by employing a linear regression equation. The measurement results of light intensity are displayed on a 16x2 LCD. The test results of the design tool against the reference tool shown that the level of accuracy of the design tool is relatively high.
Co-Authors I Gusti Agung Widagda I Nengah Sandi Ni Luh Putu Trisnawati Satriya Wibawa, I Made Tominikus Benyamin Bano