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This DIY ambilight project uses a Raspberry Pi and an Arduino to get the job done
Why buy what you could make?
Ambilight kits are pretty awesome. If you've never heard of them before, they're strips of LEDs that you attach to the back of your monitor. An app keeps an eye on the colors you're seeing on your monitor and adjusts the lights to match the color. It creates a little ambient light that matches what you're seeing on the screen, and it's pretty immersive.
