Unlike LDR that works in a visible region of light, photodiodes have more sensitivity to the infrared region. They are used with IR LED s instead of normal LEDs. When infrared light is absorbed by a photodiode, the number of free electrons and electron holes changes and raises its electrical conductivity. They are unilateral and work in reverse bias. Product Details Product type: photodiode or IR receiver or Infrared Receiver Colour: black Size: 5mm terminal: 2 Package Included: 1 x 5mm Photodiode LED IR Receiver Black
