MacroFab Engineering Podcast Useless Design Challenge Entry:

Bonsai is the art of perfectly replicating a scaled down version of nature, capturing the full beauty of the world. This project aimed to perfectly recreate the exact reverse process that allows most life on earth to function through the application of modern technological advances. The careful selection of parts was designed with no regard to efficiency, as with the process of nature, designing by slow, natural and random processes.

The process of photosynthesis is the conversion of light energy to chemical energy. This machine perfectly replicates the exact reverse process, converting chemical energy to light energy. A 9V battery powers a controller capable of carefully sequencing the emission of light, ensuring that it is a jarring and unpleasant viewing experience.

TLDR;
This project uses an Arduino Pro Mini to drive NeoPixels in order to waste energy.