5mm LDR Sensor Photo-resistor Light Dependent Resistor Photo Cell Switch 2 Pin Leads For Automatic Headlight Dimmer Control Resistor

This is a very small light sensor. A photocell changes (also called a photodetector, photo resistor, CdS or photoconductive cell) resistance depending on the amount of light it is exposed to. These little sensors make great ambient light triggers (when light in the room turns on, do something)

A light dependent resistor works on the principle of photo conductivity. Photo conductivity is an optical phenomenon in which the materials conductivity is increased when light is absorbed by the material. When light falls i.e. when the photons fall on the device, the electrons in the valence band of the semiconductor material are excited to the conduction band. These photons in the incident light should have energy greater than the band gap of the semiconductor material to make the electrons jump from the valence band to the conduction band. Hence when light having enough energy strikes on the device, more and more electrons are excited to the conduction band which results in large number of charge carriers. The result of this process is more and more current starts flowing through the device when the circuit is closed and hence it is said that the resistance of the device has been decreased. This is the most common working principle of LDR.

Light Dependent Resistor (LDR) 5mm 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 photo-resistor, 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

What is the price of 5mm LDR Sensor Photo-resistor Light Dependent Resistor Photo Cell Switch 2 Pin in Bangladesh?

The latest price of 5mm LDR Sensor Photo-resistor in Bangladesh starts from Price: ৳29.00 taka for 5 Pcs LDR. You can buy this product at a better and cheaper price from our website and also you can visit our warehouse between work hours 10am to 8pm.

Buy 5mm LDR Sensor Photo-resistor Light Dependent Resistor Photo Cell Switch 2 Pin in Bangladesh from online at Dunia.com.bd.

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