Asked by: Leizuri Hoffnerhome and garden indoor environmental quality
What is the purpose of LDR?
Last Updated: 3rd May, 2020
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Likewise, people ask, how does a LDR function?
LDR-Light Dependent Resistors It is basically a photocell that works on the principle of photoconductivity. The passive component is basically a resistor whose resistance value decreases when the intensity of light decreases.
Also Know, what is the purpose of using a fixed resistor with Photoresistor? Photoresistor. If incident light on a photoresistor exceeds a certain frequency, photons absorbed by the semiconductor give bound electrons enough energy to jump into the conduction band. The resulting free electrons (and their hole partners) conduct electricity, thereby lowering resistance.
In this regard, what are the advantages of LDR?
Following are the advantages of Light sensor : ➨It is easy to integrate with lighting system such as automatic lighting system. ➨It is used for energy consumption or energy management by automatic control of brightness level in mobile phones and auto ON/OFF of street lights based on ambient light intensity.
What is the use of transistor in LDR circuit?
Simple transistor circuits with LDR are very common and utilised in night lighting and emergency lighting systems. The transistor may directly drive a low-current LED or bulb, or a relay coil, which then acts as a switch to control a high-current load.