Sudoku puzzles solving LEGO Mindstorms robot

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LEGO Mindstorms NXT kit includes a 32-bit Microprocessor, 3 interactive Servo motors, a sound sensor, an ultrasonic visual sensor, an improved touch sensor and an improved light sensor. Hans Anderson from Sweden has done an wonderful job of assembling these pieces to create a robot that can solve Sudoku puzzles. Watch out for the demo below.

Source : https://smart-machines.blogspot.com/2009/08/lego-mindstorms-robot-solves-sudoku.html