I just finished the documentation of a little project I made for my wife with which I wanted to replace a real lava lamp with s.th. less dangerous and dirty (just imagine the mess if a real lava lamp falls to the ground and breaks...)
After some experiments, I decided to use an Espruino microcontroller to drive a 16x16 matrix of WS2812 LEDs.
You will find the complete write-up on GitHub, the project itself has also been mentioned on Thingiverse
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