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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) International Journal of Advances in Applied Sciences TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Computer Science Andalasian International Journal of Applied Science, Engineering, and Technology
M. Irwanto
Institut Teknologi Medan (ITM)
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics

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Natural Dyes from Roselle Flower as a Sensitizer in Dye-Sensitized Solar Cell (DSSC) Dayang Suriani; Muhammad Irwanto Misrun; Gomesh Nair; Baharuddin Ismail
Indonesian Journal of Electrical Engineering and Computer Science Vol 9, No 1: January 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v9.i1.pp191-197

Abstract

Hibiscus Sabdariffa L. well known as Roselle flower was used as sensitizers for Dye-Sensitized Solar Cell (DSSC). The dyes were extracted using distilled water (DI) and ethanol (E) extract solvent in an ultrasonic cleaner for 30 minutes with a frequency of 37 Hz by using ‘degas’ mode at the temperature of 30°. Doctor blade method was applied in the fabrication of titanium dioxide (TiO2) on ITO glass. Absorption spectra of Roselle dye with different extract solvent were tested using Evolution 201 UV-Vis Spectrophotometer. Fourier-Transform Infrared (FTIR) was used to identify the functional active group in extract dye. Based on FTIR result, the broad absorption at peak 2889 cm-1, 2976 cm-1, and 3366 cm-1 attributed to the O-H stretching which is the presence of hydroxyl group. The use Field Emission Scanning Electron Microscopy (FESEM) and Energy-Dispersive Spectroscopy (EDS) analysis are to characterize the surface morphology and element in the TiO2 thin film.
Noise Reduction System Using Passive Bandpass Noise Filter on Podcast Microphone Muhammad Fadlan Siregar; Habib Satria; Muhammad Irwanto Misrun; Rudi Salam
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 1 (2024): March 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i1.124

Abstract

The general properties of waves are refraction, reflection, bending (diffraction), interference and polarization. Sound is a form of wave and is in accordance with the law of wave refraction where waves coming from a less dense medium to a denser medium will be refracted closer to the normal line or vice versa. Sound waves easily experience diffraction because sound waves in air have wavelengths of around several centimeters to several meters. Then basically every room, whether you feel it or not, will always have sound. This is inversely proportional to light which has a wavelength of around 500 mm. Therefore, an interference reduction system using a passive bandpass interference filter on the podcast microphone is necessary to reduce interference. Test results carried out by filters used to reduce noise using Passive Band Pass. the waveform is still the original spectrum at 0 Hz – 120 Hz, the original sound conditions and does not cause interference, but interference occurs and filtering Category (Noise %) 10 – 40 low - 98 – 99 high.
Co-Authors A. H. Butar-Butar A.R. Amelia A.R. Amelia Ahmad Yanie Amelia Abdul Razak Amelia Binti Abdul Razak Ayong Hiendro Baharuddin Ismail Dayang Suriani Gomesh Nair Gomesh Nair A/L Shasidharan Habib Satria I. Daut I. Daut I. Safwati I. Safwati Ismail Yusuf J. H. Leong J. Zarinatul JUNAIDI Leow Wai Zhe M. Arinal M. Fareq M. Fitra M. Rozailan M.A.M. Anuar M.R. Mamat Mohd Fareq Abd. Malek Mohd. Irwan Bin Yusoff Mohd. Irwan Yusoff Muhammad Fadlan Siregar N. Gomesh N. Gomesh N. Gomesh N. Gomesh N. S. Ahmad N. S. Ahmad Nur Syafiqah Binti Zhubir Rudi Salam Safwati Ibrahim Suwarno Suwarno Suwarno Suwarno Syafruddin HS W.Z. Leow W.Z. Leow Y.M. Irwan Y.M. Irwan Y.M. Irwan Y.M. Irwan Y.M. Irwan Z. Syafiqah