Here's a piece of Transformers related artwork that I made a few years ago. If you ever watched the 80s cartoon show, you may like it.
The hardware is pretty simple - it's an array of LEDs in series, being PWM dimmed with a couple of transistors. An external 20V supply powers the whole thing.
The PWM waveforms were generated by the Axon microcontroller board. The source code and project files are here.