July 4th, 2024

Mechanical Computer Relies on Kirigami Cubes, Not Electronics

Researchers at North Carolina State University created a mechanical computer based on kirigami, using polymer cubes for data storage. The system allows reversible data editing and offers potential in encryption and complex computing. Published in Science Advances, the study demonstrates high-density memory capabilities and envisions collaborations for coding and haptic systems.

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Mechanical Computer Relies on Kirigami Cubes, Not Electronics

Researchers at North Carolina State University have developed a mechanical computer inspired by kirigami, using interconnected polymer cubes to store, retrieve, and erase data without electronics. The system allows for reversible data editing control and can convey more than binary information by adjusting the height of the cubes. The design is based on 1-centimeter plastic cubes connected with elastic tape, enabling users to manipulate data by pushing cubes up or down within interconnected units. The mechanical computer offers potential applications in mechanical encryption, decryption, and complex computing beyond binary code. The study, published in Science Advances, demonstrates the stable and high-density memory capabilities of these reprogrammable metastructures. The researchers envision collaborations to explore coding potential and the development of haptic systems for three-dimensional information display. The work was supported by the National Science Foundation, showcasing a novel approach to mechanical computing with promising future applications.

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Link Icon 11 comments
By @bondarchuk - 5 months
Have they made even a single working logic gate? The video only shows flipping bits back and forth by direct manipulation.

Edit: I am happy to report yes:

"Last, we explore the metastructure as simple mechanical logic gates. Figure 8 (C and D) demonstrates the achievement of both “OR” and “AND” logic gate operations by using independent bistability in local elements."

By @wayeq - 5 months
“Second, this proof-of-concept work focused on binary computing functions with a cube being either pushed up or pushed down – it’s either a 1 or a 0. But we think there is potential here for more complex computing, with data being conveyed by how high a given cube has been pushed up. We’ve shown within this proof-of-concept system that cubes can have five or more different states. Theoretically, that means a given cube can convey not only a 1 or a 0, but also a 2, 3 or 4.”

Is this trying to straddle the line between analog and digital computing? Because it sounds like they are describing a crippled analog computer system.

By @grondilu - 5 months
> Mechanical computers are computers that operate using mechanical components rather than electronic ones.

For anyone who's excited about mechanical computers, perhaps it is worth reminding that an electron is about a thousand times lighter than a nucleon. Therefore, it's probably fair to say that mechanical computers will always be more energy consuming than electronic ones, because they fundamentally need to move atoms around to operate.

By @tombert - 5 months
If I ever become a billionaire, I am going to have an entire big room in my house dedicated to pre-electric computers. It's amazing how much stuff got borderline-trivial once the transistor became ubiquitous, and stuff like The Writer Automaton has always been something that has utterly fascinated me.
By @colordrops - 5 months
What are use cases of this? High radiation or otherwise extreme environments?
By @ItCouldBeWorse - 5 months
Has anyone ever done a society re-bootstrapping from "mechanical computation" back to working chips? As in-a planetwide em-event knocks out all computation- how do we get factories like TSMC back on track? How do we keep food production going? Could we recover from zero, using only this set of mechanical computers and basic instructions
By @samuelec - 5 months
Maybe a silly question, are those computers suitable for harsh environments such as in a rover on Venus?
By @passwordoops - 5 months
Link to the paper (sorry it's not open source!):

https://www.science.org/doi/10.1126/sciadv.ado6476

By @theturtle32 - 5 months
Kinda reminds me of QAM
By @brotchie - 5 months
Neal Stephenson’s The Diamond Age IRL
By @hughlett - 5 months
Go Pack!