PhotocellsSelco offers single and dual Cadmium Sulfide (CdS) Light-Dependent Resistors. Featuring a spectral response similar to the human eye, these photocell devices are ideally suited for sensor applications that require human eye light perception. In the selection of a suitable CdS Photocells, the important Photocell characteristics are determined by the function of the circuit. Selco’s CdS Photocells are used in analog circuit functions such as light measurement and digital uses such as on-off switching. CdS Photocells used in digital circuits such as switching, require a fast response and a high ratio between illuminated resistance and dark resistance.
The CdS Photocell Series can provide a cost-effective solution in many light switching applications. For example, an automatic lighting system for a parking lot usually requires a timer built into the circuitry. The need for an expensive timer and electric wiring to the light is eliminated by using a photoconductive CdS photocell. The sensor can be mounted right into the light circuitry, providing a low cost solution from moonlight to bright sun. CdS Photocell features:
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