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Studi Kelistrikan dari Tanah dalam Pot Tanaman sebagai Bahan Elektrolit Sel Galvani Ulfa Mahfudli Fadli; Ardimas Ardimas; Abd. Basith; Vira Rahayu; Irasani Rahayu
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2022: Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2022
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prosidingsnfa.v7i0.71961

Abstract

Abstract: The use of conventional batteries can have negative impact on the environment. Galvanic cells as natural batteries are solution by utilizing electrolytes from nature. When two conductors namely Cu and Zn are connected through an electrolyte solution it will form a galvanic cell circuit so that a potential difference arises as a result of chemical reactions from electrodes. This study will examine the performance of soil in plant pots as an electrolyte. Galvanic cell performance is done by measuring voltage and current using voltmeter and ammeter. The independent variables are the humidity and acidity, which are measured with a pH-moisture meter. The tested soil showed an acidity value of around 7. This acidity result could mean that the soil sample containing plants was in normal condition, not acidic and not alkaline. As for the value of soil moisture, which is moist, with a value between 3 to 7. The resulting current and voltage tend to increase with the increase in the value of humidity. the average voltage value is 0.635 Volts and the average current is 0.185 mA, so it can be concluded that the soil containing plants on it can be recommended as an electrolyte in galvanic cell.Abstrak: Pemakaian baterai konvensional dapat berdampak buruk bagi lingkungan. Sel galvani sebagai baterai alami menjadi solusi dengan memanfaatkan elektrolit dari alam. Ketika dua konduktor yakni Cu dan Zn terhubung melalui larutan elektrolit maka akan membentuk rangkaian sel galvani sehingga beda potensial muncul sebagai akibat reaksi kimia di kedua elektrodanya. Penelitian ini akan mengkaji kinerja tanah dalam pot tumbuhan sebagai bahan elektrolit. Kinerja sel galvani dilakukan dengan mengukur tegangan dan arus menggunakan voltmeter dan amperemeter. Untuk variabel bebasnya adalah nilai kelembapan dan nilai keasaman, yang diukur dengan alat pH-moisture meter. Tanah yang diuji menunjukkan nilai keasaman (pH) disekitar 7. Hasil keasaman (pH) ini dapat diartikan bahwa sampel tanah yang terdapat tumbuhannya berada dalam keadaan normal, tidak asam dan tidak basa. Sedangkan untuk nilai kelembaban tanahnya yaitu bersifat lembab, dengan nilai diantara 3 sampai 7. Arus dan tegangan yang dihasilkan cenderung mengalami kenaikan terhadap kenaikan nilai kelembaban. nilai tegangan rata-rata sebesar 0,635 Volt dan arus rata-rata sebesar 0,185 mA, sehingga dapat disimpulkan bahwa tanah yang berisi tumbuhan diatasnya dapat direkomendasikan sebagai elektrolit pada sebuah sel galvani.
FABRIKASI DAN KARAKTERISASI ANTENA MIKROSTRIP PATCH RECTANGULAR DENGAN SLOT PERSEGI PANJANG & SLOT T PADA GROUNDPLANE UNTUK FREKUENSI WiFi (2,4 GHZ) Nailatus Saidah; Vira Rahayu
Jurnal Matematika dan Sains (JMS) Vol. 1 No. 2 (2021): Jurnal Matematika dan Sains (JMS)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55273/jms.v1i2.122

Abstract

WIFI is a device that can facilitate to access information. Currently, electromagnetic waves are used in the transmission of internet network data, for example WIFI. The use of a WIFI network requires a device capable of transmitting or receiving electromagnetic waves, antenna. One of the antenna models that can be implemented is the microstrip antenna. Microstrip antenna has a lightweight design and low cost in its fabrication process. This study aims to design a microsrip antenna that is able to work at WIFI frequency (2.4 GHz). The shape of the patch used is rectangular, with rectangular slots, and has a groundplane that has a T slot. The antenna is designed on a circuit board (PCB) with a permittivity of 4.6 and a thickness of 1.6 mm. Furthermore, the antenna is simulated using the CST Suite 2017 software. The results obtained antenna criteria, such as: Retun Loss -40.66dB, VSWR 1.012, Gain 5.31 dBi, Bandwidth 4.09% and transmission pattern is directional.