LDR Light Sensor Module

LDR sensor module is used to detect the intensity of light. It is associated with both the analog output pin and digital output pin labeled as AO and DO respectively on the `board. When there is light, the resistance of LDR will become low according to the intensity of light. The greater the intensity of light, the lower the resistance of LDR. The sensor has a potentiometer knob that can be adjusted to change the sensitivity of LDR towards light.

Features: Light Dependent Resistor Module

1. Can detect ambient brightness and light intensity
2. Adjustable sensitivity (via blue digital potentiometer adjustment)
3. Output Type: Analog and Digital
4. With fixed bolt hole for easy installation

• Maximum power dissipation is 200mW
• The maximum voltage at 0 lux is 200V
• The peak wavelength is 600nm
• The minimum resistance at 10lux is 1.8kΩ
• Maximum resistance at 10lux is 4.5kΩ
• Typical resistance at100lux is 0.7kΩ
• Dark resistance after 1 sec is 0.03MΩ
• Dark resistance after 5 sec is 0.25MΩ

Advantages: LDR Module

• Sensitivity is High
• Simple & Small devices
• Easily used
• Inexpensive
• There is no union potential.
• The light-dark resistance ratio is high.
• Its connection is simple

Applications:LDR Module

• Light sensitive devices
• Light intensity meter
• Burglar alarm circuit