A photo resistor consists of a device that change its electrical Ohmic resistance when light is applied. Thus it is also called as photo conductive cell or the Light Dependent Resistor abb. L.D.R. The active region of photo resistor is a thin film of cadmium, selenium, a mmore...
The measurement of displacement, position or say location is an important parameter in industries. The simplest and fairly accurate tranducer ( sensor ) used to measure displacement is potentiometer. This sensor converts linear ( or angular ) displacement into elmore...