FIVE (5) BRAND NEW NEVER USED CDS CADMIUM SULFIDE PHOTOCELL LIGHT SENSOR PHOTO CELL LDR RESISTORS
<200K LIGHT TO >10MEG DARK
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#5549

150V MAX    90MW MAX
RISE TIME 20MS
FALL TIME 30MS


A cadmium-sulfide (CdS) photo resistor (or photo cell) is a device that changes resistance depending on light intensity.
It is sensitive, fast, and has been around for decades. It's often used in street lights and as an "electric eye."
Note the resistance decreases from millions of ohms in darkness to as little as thousands of ohms in bright light depending on the CDS cell you choose.
 
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