A photocell is a resistor that changes resistance in response to the amount of light that strikes it. A photocell works on the basis of semiconductor photoconductivity: the energy of photons striking the semiconductor allows electrons to flow, lowering resistance.
A photoelectric cell, often known as a photocell, is a device that converts light energy into electrical energy. It operates on the basis of the photoelectric effect.
PHOTO CELL is an electronic instrument which is used to sense certain characteristics of its surroundings by detecting infrared radiation.it provide safety to family members and vehicles from the occasional mishap that can sometimes occur.one or two carefully placed sensors can keep automatic gate opener from closing accidentally on a vehicle or more importantly on a person