LDR 5MM

5mm LDR Light Dependent Resistor

This a 5 mm size light sensor which changes resistance with the change in the ambient light exposed on the surface of the sensor. An Light Dependent resistor (LDR) also called as photo-resist is a sensor whose output varies in proportion to the light falling on it.  This is the most common type of LDR where the resistance of the LDR decreases as the light intensity of light falling on it increases i.e the resistance is inversely proportional to the light intensity falling on the LDR.

LDR (Light Dependent Resistor) is a type of photocell which finds excellent use in light sensing device application, whether it is automatic outdoor light ON/OFF switch or Indoor automatic light switching. The sensor works best in both Light and dark region.

We have large collection of various types of Light Detection Sensors. Check our complete collection of Light, Color and Imaging Sensors.

Applications of LDR

• Automatic Headlight Dimmer
• Automated Rear View Mirror
• Absence / Presence (Beam breaker)
• Nightlight control
• Alarm Clocks
• Street Lights
• Light intensity meters
• Burglar alarm circuits

Related Links

• Light Sensor: Light Dependent Resistor(LDR)
• Arduino Based Dark Switch
• LDR Based Projects
• Using LDR with Arduino
• LDR working Principle

Related Video