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4hv.org :: Forums :: Computer Science
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Rubik cube pwned by lego

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Dr. Slack
Thu Feb 18 2010, 08:10AM Print
Dr. Slack Registered Member #72 Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
I saw this guy on a TV program about 2 years ago. He had just built a really clunky robot from Lego Mindstorms and a laptop, to solve the cube. He used algorithms that would minimise the number of moves, not for speed as such, but because every time the Lego jaws moved, there was a chance they'd fall apart, or set the cube slightly off-twist, and fewer moves meant more likely to get to the end. On the show back then, it failed after just a few moves

Fast forward to 2010

See what a difference two years of development makes

go to YouTube and search for "cubestormer"
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Renesis
Thu Feb 18 2010, 04:30PM
Renesis Registered Member #2028 Joined: Mon Mar 16 2009, 08:13PM
Location: Norway
Posts: 319
I saw that first attempt too, not particularly successful i must say. But this is awesome! Did those videos include scanning of the cube too?
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Dr. Slack
Thu Feb 18 2010, 04:46PM
Dr. Slack Registered Member #72 Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
The camera is behind the cube. The first two moves for the cube are a 360 rotation in X followed by the same on Y, to let the camera see the whole cube. So yes, the video does show the cube scanning and it's included in the time, but blink and you'll miss it.

I wonder if he's glued the lego bits together with polystyrene glue? It's what I do when I want to build a permanent mechanism from lego.
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wylie
Tue Feb 23 2010, 05:36PM
wylie Registered Member #882 Joined: Sat Jul 07 2007, 04:32AM
Location:
Posts: 103
Awesome. My desire for a big, expensive lego set hasn't been this strong since i was 12. Back then it was all non-functional "robots" though wink
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rp181
Wed Feb 24 2010, 01:37AM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Those are everywhere. Take a look at this:
Link2
I believe that this is the original, he had to go through quite a bit of troubles.
He also made a hanoi solver:
Link2
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