Light-dependent resistors don’t wear out
Stephen LawElectronics Optoelectronics Light-Dependent light-detecting photoconductive resistors
NTE Light-Dependent Resistors (LDR) or photoconductive light detecting cells, are small, inexpensive, use low-power, are easy to use and do not wear out. Photoresistors resistance decreases with increasing incident light intensity. Devices provide a high electrical resistance when it is dark, and a high electrical resistance and when it is light. Device’s electrical resistance is low. Devices, sometimes referred to as CdS cells since they are made of Cadmium-Sulfide, can be used in such applications: ambient light detecting; camera auto exposure control; backlight control; light Adjusting applications; light controlled switch; light controlled electronic toys, and more.