Characterization of LED and laser is very important to know the specifications. An electrical and optical characteristic study has been conducted on LED and Laser. The LED used are Ultrabright red, blue, green, red, yellow and white colors and red color laser sources. Based on the results of the study stated that the current and voltage values are almost linear for voltages above 3 volts, the smallest dark current value on white LED lights, yellow LED, and laser. Yellow LED has the biggest energy loss. The optical characteristics included FWHM (Full width at half maximum) , relative intensity and angle radiated maximum. The red LED has a FWHM value and the largest angle θo, while laser has the smallest FWHM and angle θo.
Kapasitor pelat sejajar adalah suatu komponen elektronika yang terdiri dari dua buah pelat penghantar sejajar yang disekat satu sama lain dengan suatu bahan dielektrik. Tujuan dari penelitian ini adalah mencari hubungan perubahan nilai kapasitansi terhadap kenaikan volume aquades dengan menggunkan metode kapasitif. Metode kapasitif memanfaatkan rangkaian sensor kapasitif yang dihubungkan dengan osiloskop untuk mengetahui tegangan masukan dan tegangan keluaran dan selanjutnya digunakan untuk menentukan nilai kapasitansi. Bahan yang digunakan dalam penelitian adalah aquades, dengan volume aquades yang digunakan divariasikan dari 18 mL sampai 180 mL. Hasil penelitian menunjukkan bahwa semakin meningkat volume aquades maka semakin besar nilai kapasitansi. Tetapi data hasil eksperimen menunjukkan bahwa ada beberapa hasil yang tidak konsisten yaitu meskipun volume aquades dinaikkan tidak menyebabkan kenaikan nilai kapasitansi. Hal ini terjadi pada kenaikan volume dari 72 mL ke 90 mL, kenaikan volume 108 mL ke 126 mL dan juga kenaikan volume aquades dari 144 mL ke 162 mL. Hubungan linieritas antara nilai kapasitansi dan level aquades dinyatakan dengan persamaan linier y = 0,0913x dengan koefisien linieritas R2 = 0,9106.
Fat is a food substance that is very important to maintain the health of the human body. One source of fat is animal fat. Differences in the type of fat can be known based on the electrical properties of materials such as dielectric constant and capacitance. The purpose of this research is to know the characteristic of dielectric constant and capacitance in animal fat by giving treatment of temperature and frequency variation. This research uses parallel plate capacitor method which is connected to the source of alternating current input voltage and voltmeter as the output voltage meter. The samples studied were chicken fat and beef fat. This research uses input voltage with frequency of 1kHz up to 20kHz, while temperature that is used is varied from 45⁰C decrease to 30⁰C. The results obtained from this study show that the increasing frequency results to the decreasing values of capacitance and dielectric constant in chicken fat and cow fat. The effect of temperature on the capacitance and dielectric constant of chicken fat and cow fat shows non linear relationship
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