![]() It is nothing but, when the light falls on its surface, then the material conductivity reduces, and also the electrons in the valence band of the device are excited to the conduction band. This resistor works on the principle of photoconductivity. That means, In the daytime, the output resistance will be less compared to nighttime. Resistance will decrease when the light increases. These resistors are often used in many circuits where it is required to sense the presence of light. When the light falls on the resistor, then the resistance changes. ![]() It is one type of resistor whose resistance varies depending on the amount of light falling on its surface. This article discusses in brief about what is a light-dependent resistor, how to interface with LPC2148.Īn LDR or Light Dependent Resistor is also known as a photoresistor, photocell, photoconductor. Hence, we can utilize the light sensor circuit for automatic switch OFF the loads based on daylight’s intensity by employing a light sensor. ![]() ![]() This is not only risky, however, additionally leads to wastage of power with the negligence of personnel or uncommon circumstances in controlling these electrical appliances ON and OFF. The dominance of street lights, outside lights, a number of indoor home appliances, and so on are typically operated and maintained manually on many occasions. Before starting this tutorial we should know the below topics. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |