I.Photo Sensor  Key Theory

Photoresistor is a resistor which made of semi-conductor material,and the conductance changes with luminance variation .The photoresistor can be manufactured with different figures and illuminated area based on this characteristic.

II. LDR sensor Application:

1.Photoresistor used for Electronic toy

2.Photoresistor used for lamps,

3.Camera automatic photometry

4.Photoelectric control
5.Indoor ray control

6.Annunciator
7.Industrial control

8.Light control switch
9.Light control lamp

Electronic toy

III.LDR  Sensor Features

1.Coated with epoxy

2.Good reliability
3.Small volume

4.High sensitivity
5.Fast response

6.Good spectrum characteristic