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Few years back two youngsters recorded a video on how to create an automatic street light at home (Hindi). You can watch this video by clicking on this link: youtu.be/Famb4zAHPLE
That video goes popular on youtube and people started asking question on working of the circuit. These two kids were not the right person to answer this question. So we request Mr. Raj Kumar Thenua to answer this question by recording a video.
In this video Mr. Raj Kumar Thenua (Sr. Lecturer at Anand Engineering College, Agra, India) demonstrate how does automatic street light circuit works.