This paper presents a novel Programmable Optically Variable Resistor (POVR) that provides a wide, continuously adjustable resistance range using an LED-LDR (Light Emitting Diode-Light Dependent ...

In this paper, the researchers demonstrate the idea of adaptive street light application system. First of all they generate the energy from non-conventional energy source. Further, they used in ...

A piezoelectric buzzer which gets activated after getting triggered from a Light Dependent Resistor.