Circuit of a compact and true solid-state automatic lawn light is described here. The circuit can be used to switch on incandescent garden light bulbs at desk and switch off them at dawn. A 10 mm ...

Flashing LED with LDR with photoresistor In this flashing led lights circuit, the LDR or photoresistor is connected in such way that when the light intensity varies it will influence the flashing ...

Modern IoT services make this kind of project much easier than before: back in 2011, [Matt] probably had to write a lot more code to make a similar Arduino-powered light work.

As the light intensity increases, the resistance decreases. A LDR can be used as a sensor in cameras or automatic lights that come on when it gets dark.