MindCuber - build your own LEGO Rubik's Cube solver

Hi David:

Great job. Very nice idea. Thanks for sharing your efforts. I leave my video:
[video=youtube_share;BEk37yFpq88]http://youtu.be/BEk37yFpq88[/video]

Greetings from Spain.
Jesus

Note: Any day you will share some of your other creations with us ?. Any machine that uses a smartphone as the brain.
Congratulations again.
 
krisstto said:
Hi David:

Great job. Very nice idea. Thanks for sharing your efforts. I leave my video:
...

Greetings from Spain.
Jesus

Note: Any day you will share some of your other creations with us ?. Any machine that uses a smartphone as the brain.
Congratulations again.
Click to expand...

Thanks Jesus for sharing your video of MindCuber. I like your NXT-G program and the mechanical improvements!

I am always thinking about the possibility of sharing one of my smartphone-based designs, perhaps even Android Speedcuber. But at the moment I am focusing on another project ;-)

David
 
I have an original older NXT that I never got around to playing with. This would totally get me to finally bring it out of storage, so if you can adapt your design to it, that would be awesome! :D

It does sound difficult without a color sensor though.. How do you plan to deal with that?
 
ToastyKen said:
I have an original older NXT that I never got around to playing with. This would totally get me to finally bring it out of storage, so if you can adapt your design to it, that would be awesome! :D

It does sound difficult without a color sensor though.. How do you plan to deal with that?
Click to expand...

I have already created a version from the original MINDSTORMS NXT kit #8527 :)

However, it will require a color sensor that you can purchase separately from LEGO as I was unable to make it work reliably with just the original monochrome light sensor...

I hope to publish the build instructions and executable code for this on http://mindcuber.com in the near future.

 
Last edited by a moderator:
Michael Womack said:
Hey David i'm wandering where I can get a lego NXT camera like the one use on this
...
thanks for your help.
Click to expand...

The camera I used for this version of MultiCuber is from the LEGO MINDSTORMS Vision Command set produced in about 2000. I had one that I bought when the set was first out :)

Perhaps you could find a second hand one on eBay or bricklink.com? But please be aware that drivers may not be available for current versions of Windows and I suspect LEGO stopped supporting it some time ago.
 
IAssemble said:
The camera I used for this version of MultiCuber is from the LEGO MINDSTORMS Vision Command set produced in about 2000. I had one that I bought when the set was first out :)

Perhaps you could find a second hand one on eBay or bricklink.com? But please be aware that drivers may not be available for current versions of Windows and I suspect LEGO stopped supporting it some time ago.
Click to expand...

Thanks
would any webcam work the same?
 
When will you be posting the source code for mindcuber? I wan't to try to modify it to work with the HiTech color sensor.
 
Vladimir Burnin said:
When will you be posting the source code for mindcuber? I wan't to try to modify it to work with the HiTech color sensor.
Click to expand...

Thanks for asking. I cannot give a definite date but I will try to do so in the near future.

It would be great if you can make it work with the HiTech color sensor for people who do not have the LEGO color sensor!
 
Thanks a lot for giving us the building instructions of the mindcuber... I built one today, and I must say that mechanically and motorwise, it works like a charm (I really had fun playing with it!).
Especially, motor adjustments in the software are really well calibrated (I'm used having to fine-calibrate variables as I'm using the NXT DC Rechargeable Battery, which does not give exactly the same conditions as the AA-batteries, but in the case of your mindcuber it worked directly).

The only problem so far is with the standard logo color-sensor which comes with the NTX2 kit... I don't know if it comes from the fact that my rubick's cube has glossy stickers, but half of the time, it confuses some colors (yellow and orange for instance).
So I get regularly scan errors (although it works from time to time...).

I also possess the hitech color sensor, which is WAY more reliable and powerful... can't wait until you release your NXC source code, so that I could integrate support for it.
Of course, I'll keep you informed if I manage to adapt the hitech color sensor; it seems I am not the only one interested :)
 
Thanks for building MindCuber.

With regard to your observations about the scan reliability... Are you using the latest version of MindCuber.rxe from http://mindcuber.com or are you using the original version that was published on the LEGO MINDSTORMS website? The later version (v2.0) has improved color discrimination for red/orange. Also, have you tried calibrating the color sensor using the white face of the cube as described in the "How To..." document in the .zip file on the LEGO MINDSTORMS website that contained the original software as this should significantly increase reliability? Note that the later version of MindCuber.rxe saves the calibration on a file in the NXT so that it does not need to be repeated every time the program is run, but only when the lighting conditions change significantly. Please let me know.

It is interesting that you say that the HiTechnic color sensor is more reliable. It would be interested to see how you get on when I do finally make time to release the source code. Please be patient.

Thanks for your interest.
 
god of rubic 2 said:
I'm quite interested in making one of these.

How much will a Lego Mindstorm set cost?

And how much does the cube stormer II cost?

Thanks.
Click to expand...

Thanks for asking. The LEGO MINDSTORMS NXT 2.0 kit is available from many places online including the LEGO online shop. You may be able to find it cheaper elsewhere.

CubeStormer II uses four of these sets, a number of other LEGO pieces and a Samsung Galaxy SII smartphone so the parts cost considerably more! :)

If you do decide to build MindCuber it would be cool to hear about your experience if you do either here or on the MindCuber facebook page

I hope you have fun.
 
Dear

With my classmates, I made ​​the mindcuber. We have the software installed, but when scanning gives the nxt a scan error. how can we fix this error?
My apologies for the poor english.
I hope to hear from you soon


kind of regards Rob
 
robdylanivo said:
Dear

With my classmates, I made ​​the mindcuber. We have the software installed, but when scanning gives the nxt a scan error. how can we fix this error?
My apologies for the poor english.
I hope to hear from you soon


kind of regards Rob
Click to expand...

Thanks for building MindCuber. I'm sorry that you are having problems getting it to scan.

There are quite a few things which may make the scan unreliable. In particular:

1) have you downloaded the latest version of MindCuber.rxe (v2.0) to the NXT from the MindCuber website?
2) if you are using the latest version of MindCuber.rxe, does the NXT say "Scan error..." or "Cube error..." and what color does the color sensor flash after the scan?
3) have you tried calibrating the color sensor using the white face of the cube? This is described in the "How to..." document on the LEGO MINDSTORMS website
4) are you using a standard Rubik's Cube with the official colored Rubik's logo? If not, is it a black cube with white, yellow, red, orange, blue and green faces?

Please look at the MindCuber facebook page and read some of the comments there for further suggestions.

If you are still unable to make it scan, please leave me another message here or on the facebook page and I will try to help further. Thanks
 
IAssemble said:
Thanks for building MindCuber.

With regard to your observations about the scan reliability... Are you using the latest version of MindCuber.rxe from http://mindcuber.com or are you using the original version that was published on the LEGO MINDSTORMS website? The later version (v2.0) has improved color discrimination for red/orange. Also, have you tried calibrating the color sensor using the white face of the cube as described in the "How To..." document in the .zip file on the LEGO MINDSTORMS website that contained the original software as this should significantly increase reliability? Note that the later version of MindCuber.rxe saves the calibration on a file in the NXT so that it does not need to be repeated every time the program is run, but only when the lighting conditions change significantly. Please let me know.

It is interesting that you say that the HiTechnic color sensor is more reliable. It would be interested to see how you get on when I do finally make time to release the source code. Please be patient.

Thanks for your interest.
Click to expand...

I used the latest version of MindCuber.rxe from http://mindcuber.com, but did not know about the calibration (thanks for the tip).
After 3 sessions of scan errors, I pressed the orange button, removed the cube and then placed it again with white face on top.
After calibration, it's in fact working a lot better.

But it won't prevent me from trying to implement the hitech sensor... will be fun and interesting to see how it will perform!

Thanks for your help and your amazing robot!
 
Dear sir/madam,

We have build the robot and it works, but our question is if we could get the program codes in a file we can access?
i hope it is possible because our teachers want to know this?
I hope to hear from you soon

Regard Rob
 
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