Simple Dark Activated Switch

You all know FREE CIRCUIT DIAGRAMS 4U always try to give simple and useful circuit diagrams.Today we are going to give you a Simple dark activated circuit diagram.When the dark comes this circuit will activated.This circuit is operated with 12v power.Most of time these types of circuits are used to design robot hands etc.And also you can make a counter of people.For that you can use a lazer pointer and aim it to the LDR.When a person is passing.Lazer beam will cut due to that the circuit will activate.you can use this circuit for various things so try this...

Note:
        # Build this circuit on a PCB 
        # Don't supply over 12V