Browsing Physics by Author "Kalingamudali, S.R.D."

Now showing items 1-20 of 35

A Study of CuInS2 Thin Films for Photovoltaic Applications

Wijesundera, R.P.; Nadesalingam, M.P.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D.; Jayanetti, J.K.D.S.; de Silva, K.T.L. (Proceedings of the Technical Session of Institute of Physics, 1999)

Thin films of copper indium disulphide (CuInS2) on Ti Substrate were prepared by annealing potentiastatically electrodeposited Cu-In alloy in H2S gas at 5500 C. Films were characteristised by X-ray diffraction (XRD), ...
Advantages of the use of solar cells and light emitting diodes (LED) for traffic signal lights for the current power crises in Sri Lanka

Kalingamudali, S.R.D.; Kalingamudali, M.L. (2002)

During power failures and power cuts road users suffer immense difficulties due to non-availability of traffic signal lights. Use of solar cells with lead acid accumulators to provide required power and the use of light ...
An inexpensive universal serial bus interfaced home automation system

Wijesundera, R.P.; Abeyratne, M.D.G.M.; Kalupahana, I.U.; Buddhika, W.A.P.; Kumara, S.D.; Jayatissa, N.W.K.; Harambearachchi, J.C.; Kalingamudali, S.R.D. (IET Sri Lanka Network-19th Annual conference, 2012)
Analysis of Impedance Matching Technique for Novel Supercapacitor Assisted PV Systems

Piyumal, P.L.A.K.; Ranaweera, A.L.A.K.; Kalingamudali, S.R.D.; Kularatna, N. (IEEE Computer Society, 2020-10)

To extract the maximum power from a photovoltaic (PV) system, the maximum power point (MPP) of the PV array must be tracked continuously. A directly coupled load with the PV array does not track the MPP of the PV array ...
Computational Study of I-V characteristics of ITO/Cu2 O/Metal junctions, Technical Session of Institute of Physics

Wijesinghe, W.M.P.L.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D. (Processing of the Technical Session of Institute of Physics, 1999)

A theoretical model for current-voltage (I-V) characteristics of back-to-back diode systems was developed using the ideal diode equation. A computer model was developed using the language C++ to fit the experimental data ...
Computational Study of I-V characteristics of ITO/Cu2/Metal junctions

Wijesinghe, W.M.P.L.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D. (1999)

A theoretical model for current-voltage (I-V) characteristics of back-to-back diode systems was developed using the ideal diode equation. A computer model was developed using the language C++ to fit the experimental data ...
Construction of a Near Ideal Nanoammeter

Wijesundera, R.P.; Kalingamudali, S.R.D.; Jayasuriya, K.D. (1998)

A near ideal ac/dc nanoammeter was constructed using two operational amplifiers (op-amp) and a voltmeter. Small currents were converted into a voltage by the first op-amp and this was amplified into a larger voltage by ...
Current gain increase in AlGaAs/GaAs heterojunction bipolar transistors using AlGaAs layer overgrowth

Kalingamudali, S.R.D.; Wismayer, A.C.; Woods, R.C.; Roberts, J.S. (Applied Physics Letters, 1994)

Reduction of the surface recombination current components in Npn AlGaAs/GaAs heterojunction bipolar transistors has been achieved by overgrowing the emitter?mesas with an AlGaAs layer approximately 0.5 ?m thick. It was ...
Design of an Inexpensive Digital Watt-hour Meter

Chandana, A.W.S.; Wijesundera, R.P.; Jayasuriya, K.D.; Kalingamudali, S.R.D. (2003)

An inexpensive digital watt-hour meter has been designed and tested using MCap 7 simulation package since commercially available digital watt-hour meters are very expensive. One of the major usages of watt-hour meters is ...
Design of an Inexpensive GPIB Interfaced Voltage Source

Kalingamudali, S.R.D.; Jayasingha, A.M.R. (2006)

An inexpensive voltage source that can be controlled by a computer using the general purpose interface bus (GPIB) controller is designed since commercially available GPIB interfaced voltage sources are very expensive. The ...
Development of electronics from vacuum tubes to intergrated circuits

Kalingamudali, S.R.D. (Science to Society (YSF Science Magazine, NASTEC), 2004)
Effects of lightning and possible health hazards due to the erection of telecommunication towers

Maduranga, J.A.K.; Kalingamudali, S.R.D.; Jayaratne, K.P.S.C. (Wayamba University of Sri Lanka, 2016)

The health hazards due to lightning and electromagnetic radiations in the neighbourhood of telecommunication towers were studied. Six tower sites were selected for the investigations from the areas covering the Sri Lankan ...
Efficiency Optimization of Supercapacitor Assisted Low Dropout (SCALDO) Regulators

Jayasekara, L. D. P. S.; Piyumal, P. L. A. K.; Ranaweera, A L A K.; Kalingamudali, S.R.D. (IEEE, 2020-12)

This study was primarily focused on presenting a novel method to enhance the eﬃciency of Supercapacitor Assisted Low Dropout (SCALDO) regulators. The main objective was to study SCALDO regulators under a speciﬁcally ...
Electronic Scoreboard for Basketball games

Kalingamudali, S.R.D.; Dedigamuwa, G.S. (2002)

An electronic scoreboard has bean designed and fabricated for the basketball game. Although this has been specifically designed for the basketbaU game. this can also be used for other games such as Rugby. Hockey, Boxing ...
Experimental evaluation of separate contributions to ideality factor for the base surface recombination current in heterojunction bipolar transistors

Kalingamudali, S.R.D.; Wismayer, A.C.; Woods, R.C. (Materials Science and Engineering: B, 1994)

In this paper it is shown experimentally, for the first time, that the ideality factor n for the extrinsic base surface recombination current in AlGaAs/GaAs heterojunction bipolar transistors (HBTs) is unity and is bias ...
Fabrication and Characterisation of CuinS2/ZnSe/Metal Structures for Solar Cell Applications

Kalingamudali, S.R.D.; Wijesundera, R.P.; Gunatunga, N.P.; Siripala, W.; Jayasuriya, K.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (2000)

Thin film solar cell structure of Ti/CuInS2/ZnSe/Metal was fabricated using simple electrochemical and sulphurisation techniques. Copper lndium Disulphide (CuInS2 thin films were prepared by sulphurisation of Cu-In alloy ...
Growth and Characterisation of CuInS2 Thin Films

Wijesundera, R.P.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S.; Samantilleke, A.P.; Dharmadasa, I.M. (1999)

Copper Indium Disulphide thin films were grown by electrodeposition of Cu-ln alloy followed by sulphurisation in H2S gas. It was observed that the ionic concentration of Cu2+/ In3+ in the electrodepositing bath determines ...
Improving the Energy Storage of Standalone PV Systems while Enhancing the Charging Efficiency using Supercapacitors

Piyumal, P.L.A.K.; Ranaweera, A.L.A.K.; Kalingamudali, S.R.D.; Kularatna, N. (IEEE Xplore Digital Library, 2019)

Usually a battery is used as the energy storage device in typical standalone solar photovoltaic (PV) systems. It is charged by a solar charge controller. The charging efficiency of the system depends on the efficiency ...
IV characteristics of ITO/Cu2O/ metal junctions

Perera, L.D.R.D.; Siripala, W.; Kalingamudali, S.R.D.; Jayanetti, J.K.D.S.; de Silva, K.T.L. (1996)

Cuprous oxide is an inexpensive and non-toxic semiconductor material having the potential for use in low-cost photovoltaic devices. Electrodeposition is a low-cost method t0 produce thin Cu2O films and electrodeposited ...
New Experimental Interpretation for the Emitter-size Effect of AIGaAs/GaAs heterojunction bipolar transistors.

Kalingamudali, S.R.D.; Woods, R.C.; Wismayer, A.C. (1995)

AIGaAs/GaAs heterojunction bipolar transistors (HBTs) have an excellent frequency performance. One of the major limitations of these devices is current gain degradation with decreased emitter-base junction size, which is ...

Browsing Physics by Author "Kalingamudali, S.R.D."

Browsing Physics by Author "Kalingamudali, S.R.D."

Search Digital Repository

Browse

All of DSpace

This Collection

My Account