Definitions for "Photocell"
Light-sensitive device used to operate fixtures according to available daylight. They are used in solar lighting and to turn outdoor or security lights on and off at dusk and dawn.
An electronic device that, when modulated by visible light, produces electrical impulses that can be amplified to drive audio speakers.
photoelectric cell; the light-sensitive component within a photosensor. The actual device might be a photodiode, a phototransistor, or a photoconductive cell. It is important to make a distinction between a photocell and a complete photosensor device. A photocell might be any device in which light controls the electron emission from a cathode, the electrical resistance of an element, or the electromotive force produced by a cell; it is usually incorporated in an electric circuit and used in mechanical devices such as door openers or home outdoor night lights.