One day I forgot to turn off my homes Entrance Door's light after that i thought why not to make a project on it.
When Sun Rise so at that point what it does is, It senses the sunlight when it senses the light it turns off the light and when the Sun Sets it turns on the light. and it also reduces your electricity bills.
When Sun Rises at the point light travels to LDR and it reduces the resistance and when it reduces its resistance the power which we was apply to it gets in return and goes to the Arduino and when the Arduino gets the signal he fires up the relay and this is how it works.
And after this I'm working on Solar Charge Controller for 24V Batt Setup so stay tuned for that also
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