could someone tell me what electronic components i would need to make a dc powered dusk/dawn sensor? thanx..?

Answer 1

Here's a pretty simple circuit. The parts list is also given (if that is all you need).

http://www.uoguelph.ca/~antoon/circ/sensor2.htm

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Answer 2

The item you need is Photo synthetic cell. It's a device which will open the circuit when it detects light and close the circuit when the light is gone. Hope this helps