Kalingamudali, S.R.D.; Harambearachchi, J.C.; Kumara, L.S.R.; de Silva, J.H.S.R.; Piumwardena, D.D.F.; de Silva, L.D.L.; Abeynanda, L.T.; Chameera, K.H.G.G.; Dissanayake, D.P.; Attenayake, A.M.C.R.; Molligoda, S.A.G.N.
(2006)
During power failures and power cuts road users suffer immense difficulties due to non-availability of traffic signal lights all over the world. Use of solar cells with lead acid accumulators to provide required power and ...