Browsing Ruhuna International Science and Technology Conference by Author "Abeywickrama, S.S."

Browsing Ruhuna International Science and Technology Conference by Author "Abeywickrama, S.S."

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  • Design and construction of a low-cost AC conductivity meter to test solutions 
    Hansini, K.L.T.; Abeywickrama, S.S.; Wickramasuriya, N.T. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2020-01-22)
    Conductivity measurements in freshwater samples are crucial as drinking high conductive water could lead to health issues. A low-cost conductivity meter was constructed to measure low conductivities in the range that ...
  • Design and construction of an automated rain gauge 
    Medis, W.W. Rukshan; Dharmaratne, W.G.D.; Bodhika, J.A.P.; Abeywickrama, S.S. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2014-01-22)
    An “Automated Rain Gauge” has been designed and constructed successfully using a microcontroller. The method is based on measuring the mass of rain water using a load cell. The rainfall is measured and recorded automatically ...
  • Design and fabrication of a low cost automated tipping bucket rain gauge with locally available materials 
    Kavindi, M.H.U.; Abeywickrama, S.S.; Ranatunga, E.M. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2022-01-19)
    Rainfall measurement is a key requirement in some modern industrial and agricultural fields. Hydrological forecasting, flood control, landslide prediction and many hydrological models require accurate precipitation ...
  • Design and implementation of an altazimuth mount drive for a Newtonian telescope coupled to a DSLR camera 
    Amaradasa, H.D.S.; Abeywickrama, S.S.; Ranatunga, E.M.; Mahanama, G.D.K.; Baduge, S.; Priyankara, J.G.V.; Gunawardhana, S.D. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2017-01-26)
    A telescope mount is the mechanical structure which supports the optical elements of the telescope. When obtaining images by attaching a camera to the telescope the performance of the telescope mount becomes critical. ...
  • Development of a low cost optical spectrometer for visible region 
    Abeywickrama, A.L.K.R.; Lewangama, L.G.R.C.; Abeywickrama, S.S.; Wickramasuriya, N.T.; De Silva, W.M.K.; Perera, H.A.D.S.D. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2018-02-15)
    A low cost modifiable spectrometer was developed for use in the spectral analysis. Light emerging from the source is f ocused using matching set of lenses on to two adjustable slits to collimate the beam. Then it was ...
  • Development of a low-cost high-resolution multi grating Spectrometer controlled by Arduino 
    Wijethunga, M.V.; Abeywickrama, S.S.; Perera, H.A.D.S.D. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2021-02-17)
    A low-cost and high-resolution spectrometer was developed as a substitute for the very expensive spectrometers available in the market, for the analysis of spectra in the visible region. Collimated light from standard ...
  • A low cost automated device for releasing a certain mass of small seeds or powder materials 
    Wickramasinghe, T.P.; Ranatunga, E.M.; Abeywickrama, S.S. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2022-01-22)
    A simple automated device has been designed and constructed in order to release a certain mass of small seeds or powdered materials. The device uses a screwed axel rotating inside U shaped tube, which is fixed to the ...
  • A low cost electronically controlled multi function dryer 
    Samanthi, S.H.; Ranatunga, E.M.; Abeywickrama, S.S. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2014-01-22)
    A simple automated device has been designed and constructed to dehydrate different types of food for industrial applications. Preliminary tests indicated that the device could dehydrate a food under a desired temperature. ...
  • A novel device for bending PVC pipes for plumbing purposes 
    Sanjaya, N.A.A.K.; Dharmaratna, W.G.D.; Abeywickrama, S.S.; Ranatunga, E. M. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2017-01-26)
    PVC bends are commonly used by plumbers when laying PVC pipe lines in buildings. Many plumbers make bends by themselves by just heating and bending by hands, which is not the most successful method, especially for less ...
  • A preliminary study of an electronic model to analyze the current-voltage characteristics of semiconductor nanowires 
    Gayashani, W.I.A.; Abeywickrama, S.S.; Wickramasuriya, N.T. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2023-01-18)
    The current-voltage (I–V) characteristics of single nanowire (NW) Field Effect Transistors are found to be depended on the device geometry and contact resistances. The proposed electronic model for the metalsemiconductor- metal ...
  • Testing astronomical optical standards of locally made parabolic mirrors for Newtonian Reflecting Telescopes 
    Amaradasa, H.D.S.; Abeywickrama, S.S.; Ranatunga, E.M.; Mahanama, G.D.K. (Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2016-01-28)
    A study of mirror making was initiated with the aim of designing a Newtonian reflecting telescope. Parabolic mirror of 15 cm aperture and 1.49 m focal length was made utilizing two identical Soda-lime glass disks. One ...

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