LDR

Description

LDR Stands for Light Dependent Resistor and its Resistivity varies with Incident Electromagnetic Radiations so, its resistivity is a function of Incident Electromagnetic Radiations or light. Other names of LDR are photoresistor, Photoconductor, Photocell and photo conducting cell

LDR is made of Semiconductor materials with high Resistance like Silicon or Germanium. It is a light sensitive device, so this resistor has a different resistance value in day and night as given below

• Daylight: 5000Ω
• Dark: 20000000Ω

Specifications

• Cheap price and available in different sizes according to application
• It requires less power to operate
• Quick Response
• Easy to use
• Generate high current

Applications

• Camera Exposure Control
• Auto Slide Focus
• Photocopy Machines
• Colorimetric Test Equipment
• Densitometer
• Electronic Scales
• Automatic Gain Control
• Automated Rear View Mirror
• Automatic Headlight Dimmer
• Night Light Control
• Oil Burner Flame Out
• Street Light Control