Programmable matter? Recyclable 3D printing. Eventually perhaps, Transformers like Optimus Prime, if you will.
The current prototypes are about six centimeters long and have electromagnets embedded in each of their 12 edges. Add a microcontroller and integrated circuits that allow you to regulate the direction current passes through the electromagnets, and you can get the ElectroVoxels to attract or repel each other in sufficiently sophisticated ways to allow pivots around a shared axis and transversal across the face of another ElectroVoxel.
That could be useful for nonstandard tools, or to rearrange mass for spinning motions to initiate a form of artificial gravity via centrifugal force, or to place mass between you and a dangerous solar flare. “We’re working on miniaturizing these modules in order to get a little bit smaller, and you want to build hundreds of thousands of these that can do reconfiguration in order to enable a kind of recyclable 3D printing,” Nisser told me.
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