A photocell changes (also called a LDR, photodetector, photoresistor, CDS or photoconductive cell) resistance depending on the amount of light it is exposed to.
These photocells can be used in many applications:
- Auto-focus lenses
- Exposure meters
- Contrast controls for TVs
- Dimmer or light switches
- Flame detectors
- Electronic toys
- Street lamp switches
- Optocouplers
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 Order# |  Light  |  Dark |  Size of photocell  |
 Photo-300   |  5K |  200K |  5mm |
 Photo-310 |  8K |  1Meg |  5mm |
 Photo-320 |  45K |  10Meg  |  5mm |
 Photo-330 |  16K |  5Meg |  5mm |
 Photo-340 |  50K |  20Meg |  5mm |
 Photo-600 |  8K |  300K |  10mm |
 Photo-610 |  12K |  1Meg |  10mm |
Note: Size of photocell may change by manufacture.