Ferrofluid has quite a story. It was invented in the early 60s by Steve Papell for moving rocket fuel in a zero gravity environment using magnets. Nowadays it is used to build fancy speakers too. The Spirok Black ROBO is one of the coolest ferrofluid visualizers we have seen. It has a mecha stand and works with any audio source, including phones, TVs, and musical instruments.
More gadgets like this: here
ROBO - demo
5 Ferrofluid Music Speakers / Visualizers Compared 🟡 @Gadgetify
This audio visualizer uses a microphone to pick up sounds all around it. It has a footprint of 10cm x 10cm x 12cm. The mecha stand is compatible with Robo, Ball, and even your Echo Dot 4/5. Its legs allow for adjustable angles.
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