(NPN transistor- BC547 or BC147 or BC548) Automatic Plant Watering & Irrigation System – Circuit, Code & Project Report.In sunny and rainy days, ON and OFF time differ noticeably which is one of the major disadvantage of using timer circuits or manual operation for switching the street light system.By using this Automatic system for street light controlling, we can reduce energy consumption because the manually operated street lights are not switched off properly even the sunlight comes and also not switched on earlier before sunset.It automatically switches OFF lights when Sunlight fall on it ( i.e on LDR ) e.g in morning, by using a sensor called LDR (Light Dependent Resistor) which senses the light just like our eyes.It automatically switches ON lights when the sunlight goes below the visible region of our eyes. ![]() It is a simple and powerful concept, which uses transistor (BC 547 NPN) as a switch to switch ON and OFF the street light system automatically.Here is our new simple Electrical/Electronics project about Automatic Street Light Control System for students and hobbyists. Basic Electronic Project – Automatic Street Light Control System
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