韩国网友制作的铁磁流体扬声器,磁性颗粒随着音乐,在外界磁场的作用下不断变幻形状。这个东西感觉比熔岩灯好。https://hackaday.io/project/179136-ferrofluid-display-cell-bluetooth-speaker
https://twitter.com/ruanyf/status/1393202211778301954
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