Day or Night Detector

This circuit detect if it's the Day or the Night, and turn on the light accordingly. You can use it to turn the light ON from sunset to sunrise

this circuit is :

a stand alone Solar Panel
one inverter (NOT), connected to main power
one auto switch, connected to main power
two row of lights

When the sun is up, the solar panel deploy and produce energy. It's tell the inverter and the auto switch to activate. The inverter, a NOT gate, will cut the power to the Night lights row, and the auto-switch will let electricity flow to the Day lights.

At night, the solar panel close, and the auto switch disactivate, cutting power to the day lights. Then the inverter, who can't oppose this time, let the energy reach the Night lights

main source : Fringe Theory Gaming

See the real circuit at the No Man's Sky school of Technology, Campus planet, Zap system, Euclid

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