Advanced Photonix, a division of OSI Optoelectronics, has introduced Cadmium Sulfide (CdS) Light-Dependent Resistors (LDRs), specially designed to sense light from 400 nm to 700 nm. The photoconductive devices’ resistance decreases as the light level increases, representing the efficiency characteristics of the human eye. The photoresistors, or photocells, are available with various resistance values and packaging.
CdS photoresistors are ideal for street and solar lighting, audio compression and flame detection, camera light meters, and exposure and shutter controls applications. They can also be utilised in clock radios, alarm devices, outdoor clocks, and night light controls.