Electronic Products & Technology

Light-dependent resistors don’t wear out

July 28, 2021  Stephen Law

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.

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