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LEGO Robot Smashes Rubik's Cube Speed Record

Videos LEGO by Joey Paur

This LEGO robot is called CUBESTORMER 3 and it has smashed the Rubik's Cube speed record. It solved it in 3.253 seconds at the Big Bang Fair in Birmingham, UK. This is 2 seconds faster than its Dad, CUBESTORMER 2. The previous record was 5.27 seconds. Here's how it works:

The robot employs an ARM-powered Samsung® Galaxy S4 smartphone to analyze the cube and instruct four robotic hands to do the manipulations. ARM9™ processors also power the eight LEGO® MINDSTORMS® EV3 bricks which perform the motor sequencing and control.

The custom app developed for the smartphone uses the phone's camera to capture images of each face of the Rubik's Cube which it processes to determine the scrambled colors. The solution is found using an advanced two-phase algorithm that was originally developed for Speedcuber and then enhanced to make effective use of the dual-core ARM Cortex®-A9 based processor in a Samsung Galaxy SII smartphone used in CubeStormer II. Further optimizations were made to take advantage of the eight-core big.LITTLE™ processor configuration featuring four Cortex-A15 and four Cortex-A7 processors in the Galaxy S4.

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