You never forget your first diorama, especially when it’s interactive. Although admittely a bit late to celebrate Erntedankfest (Germanic Thanksgiving), [Markus Bindhammer] is ahead of the curve when it comes to the American version.
This interactive diorama lamp features a cute chameleon that [Markus sculpted from a wire frame and a lump of clay]. In the chameleon’s midsection is a ping pong ball that does the work of diffusing an RGB LED. Wires run out the far side and through the bamboo stand and connect to a RGB color sensor and an Arduino Pro Micro.
The lamp does what you think — hold any colored object up to the color sensor, and the chameleon will change colors to match. When no one is interacting with the lamp, it slowly runs through a rainbow of colors. Be sure to check out the build video after the break.