Those Cadmium Sulfide lights sensors usually have a very wide swing of resistance when exposed to varying levels of light sensitivity ... time around it’s an Arduino doing the measuring instead ...

And this 240-pixel touch-sensitive light box coffee table ... to custom-built shift register boards for the touch sensors, and an Arduino with Bluetooth runs the whole thing.

That makes it ideal for applications like robotics or controlling smart blinds that react to light. With me so far? Here is a list of projects that you can do with an Arduino that are fun ...