The third-generation robot was built by co-inventors David Gilday and Mike Dobson for pure, blistering speed. The Samsung Galaxy S4 brain is tricked out with an Exynos octa-core processor, with four Cortex-A15 and four Cortex-A7 processors controlling eight Lego Mindstorms actuators. It's basically the SR-71 Blackbird of Rubik's Cube bots. [...]
The smartphone brain analyzes the cube's starting arrangement, then instructs four robot arms to carry out each step needed to get the cube to its solved state. Since the robot uses a speed cube, which allows twisting moves even when the sides aren't perfectly aligned, the robot hands must be amazingly precise to move so smoothly and quickly.
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