Arduino controlled Christmas lights ... and one shining out. He’s set up a ton of different patterns to run, and they are pretty awesome! Check out the video after the break.

That makes it ideal for applications like robotics or controlling smart blinds that react to light ... the Arduino to another ...

The setup is pretty simple as you might expect. A photocell and TMP36 temperature sensor are connected to the Arduino ... shows the temp and amount ambient light present in the room.