Rubik's Cube

Robot Ruby Holds New Record for Solving Rubik’s Cube

July 29, 2023 by noemi

The “contest” to solve Rubik’s Cube the fastest is a perpetual one. Both humans and machines are continually coming up with strategies and techniques to solve this puzzle in the least number of moves and shortest period of time. Recently, we were wow-ed by teenager Feliks Zemdegs when he set a new world record for solving a 3x3x3 cube in a mere 6.24 seconds. No one can say that this feat may not be broken in the future, but for now, it is something that we can only marvel at.

Now that’s the humans’ record. In case you didn’t know, robots are also at it – solving Rubik’s Cube, that is. Of course, it can be argued that at the end of the day, the accolades still fall on human heads as they are the ones that make these robots.

A group of students who were on the Mechatronic Engineering/Computer Science degree program at the Swinburne University of Technology had a brilliant final project last year. It was brilliant then, and it is brilliant now – never mind that the press just got wind of their creation.

Named Ruby, the robot solves the Cube by scanning the faces in order to recognize its status before setting to solve the puzzle. Ruby has made it to the charts – she is the fastest Rubik’s Cube-solving robot at 10.69 seconds. Impressive, but I have to give Zemdegs this one.

This is a quick rundown on how Ruby does her thing, straight from one of the students who created her: ((Source: dakiller))

The basic rundown of operation is that there are 2 systems, the PC software and the embedded microcontroller hooked together via a USB serial link. The camera connected to the PC scans in the cube and detects the colours and determines the cube in the computer, then runs through a tree search algorithm (our own implementation of Kociemba’s Algorithm) that finds a list of moves that will solve the cube. That is then fed to the microcontroller which has some big DC servo controlled motors and solenoids that manipulate the robot grippers, to the physical solving of the cube.

And here are some behind the scenes videos from the guys themselves.

When Rubik’s Cube and The Joker Collide

July 10, 2023 by noemi

Rubik’s Cube is always a hit with nerds, geeks, or whatever label you want to use. Admit it, as a kid, you probably spent a considerable amount of time trying to one-up your friend in solving this puzzle. Decades later, Rubik’s Cube still holds irresistible attraction for kids of all ages. Of course, with the changing times, we also see all sorts of new things that people do with Rubik’s Cube.

Here’s a perfect example of what one can do with hundreds of Cubes. Sometime last year, artist David Alvarez decided to come up with a mosaic portrait of The Joker – the Heath Ledger version, of course. He used about 300 Rubik’s Cubes to create a pretty good representation of arguably the best Joker ever. Lest you think that it is a simple matter to put those multi-colored cubes together, I ought to tell you that Alvarez had to give his brain a little work out. Before putting the Cubes together, he first had to twist them into the appropriate color patterns.

Since I have never tried to create artwork with Rubik’s Cubes, I really don’t know difficult that is. I do think, however, that it might be a viable alternative to having to solve one of those darned puzzles. Check out the video and let me know what you think.

Here’s another video of the same artist creating another mosaic. This is an older video, actually, and he uses dice to “draw” Marilyn Monroe and James Dean. How cool is that?

Rubik’s Cube Chest of Drawers

December 9, 2011 by noemi

The fascination for the Rubik’s Cube is something that spans generations and cultures. I do not think that it will go away any time soon. Whether you think of the actual cube which you can play with (more like make you want to tear your hair out in frustration), or you think of other items made in the likeness of the Rubik’s Cube, the effect is the same. People are drawn to this timeless puzzle. [Read more…]