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Related - there's a Guinness record for the fastest Rubik's cube solving robot; it stands at 103 milliseconds:

https://www.youtube.com/shorts/ue2gZ2vxs48

https://engineering.purdue.edu/ECE/News/2025/purdue-ece-stud...

Hi all. I just found this thread. I'm the creator of SARCASM. Thanks to the OP for sharing. I spent many hours on this build but it was a lot of fun. I'm happy to see that others are enjoying it also :-)

If you're interested in the technical side, I wrote detailed posts on the hardware and software on the Teensy forum: https://forum.pjrc.com/index.php?threads/sarcasm-an-over-eng...

The aesthetics of this are great. Nice job.

Demo: https://youtube.com/shorts/Xer4mPZZH8E

I want an automatic scrambling machine, not an automatic solving machine. Two cubes. While you're solving one, the other one is being scrambled. Cubers spend way more time scrambling than solving. Scrambling is the annoying part that needs automating.

There's a lot more detail describing the project in a couple of forum posts here: https://forum.pjrc.com/index.php?threads/sarcasm-an-over-eng...

Cool!!, I've created this one 16 years ago: https://www.youtube.com/watch?v=bkWLQZgi9uE

I can see very similar movements this robot is doing compared to my old robot. I really like the screen outputs of it.

Solving a cube has two parts, determining the moves and making the moves. For humans these two activities happen mostly in parallel. For robots, moves were already determined before the start. So the time taken is merely all about speed of move making.

I built a cubotino a few years ago, similar mechanism, see https://github.com/AndreaFavero71/cubotino

Uses a rpi 2 w, works well, can solve and scramble 3x3x3 cubes, using just 2 servo motors.

I think you built a rubik cube solving machine just to show-case your acronym ;-) Super cool work.

SARCASM: the only acronym worth building hardware for

This looks like a good place to ask HN:

I've started with a solved cube, then turned 2 sides sharing an edge, alternatively (same direction) expecting the cube to get messed up but then returning to its solved state.

It never got solved! Maybe i didn't do it enough (i did it hundreds of times i think). Has anyone got an explanation?

The personality of creator really shines through in the software. Douglas Adams would be pleased, I hope loads of hackers will be inspired to make more 'Adamsian' robots.

This is a hot contender for the Most Awesome Thing I Saw On The Internet In 2025. Incredible work!

The screen ui aestetic and audio (specifically the dubbing) remind me of the silver case series, may be a total reach, nice touches none the less!

https://en.wikipedia.org/wiki/The_Silver_Case

Pedantic pet peeve: it'd be S.A.R.C.A.S.M. or SARCASM but not S.A.R.C.A.S.M

You are missing the last full stop, unless your project is actually meant to be called "S.A.R.C.A.S. M"

An initialism either uses full stops after all letters or none of them.

Impressive work. Curious to how many hours of labor what the development path was. Several man-years possibly?

So does that make the developer a sarcasmaholic?

https://www.youtube.com/watch?v=JcOfFeKXcd4

This is fantastic, how did it not get confused by the blue logo on the cube in the video?

This is one of the best arguments for purchasing a 3D printer

whats the point? rubicubes are for hoomans got one when I was 12, solved the next day, couldn't tell you how,got better, got fast, got bored, never touched one again. but this much....not knowing and solving as an unconsious process is likely to be the advantage or to put it another way, knowing is limmiting and constrains doing. hooman thing.right

It's a cool project, but also they're really underselling the amount of work put in to make it annoying.