# From Marbles to Machines: A Mechanical Computer Kit Redefines ‘Hands-On’ Computing

## From Marbles to Machines: A Mechanical Computer Kit Redefines ‘Hands-On’ Computing

Jesse, under the moniker “uncial,” recently unveiled a fascinating project on Hacker News: Roons, a mechanical computer kit that brings the abstract world of computation into tangible, marble-powered reality. Forget transistors and silicon; this creation utilizes a clever system of contoured tiles, alternating bars, and, most importantly, marbles to execute logic gate operations.

The kit, accessible at [https://whomtech.com/show-hn](https://whomtech.com/show-hn), is based on the concept of a cellular automaton, realized on a physical “loom.” Marbles, guided by specifically shaped tiles, cascade through the system, performing logical operations as they navigate the intricate network. The result is a strikingly visual and surprisingly compact computer. According to Jesse, a binary adder can be fitted into a mere 3cm square.

While the theoretical underpinnings of Turing completeness are impressive, the true ingenuity of Roons lies in its focus on practical application. This isn’t just a proof-of-concept, but a carefully designed kit intended for hands-on learning and experimentation. The project is the culmination of nearly two years of development and numerous iterations, reflecting a deep commitment to both functionality and accessibility.

To aid users in understanding and utilizing the system, Jesse has created a series of interactive tutorials, demo videos, and even a “janky simulator.” These resources aim to demystify the mechanics of Roons and guide users through its various capabilities. Prototype kits have already been distributed, with more ready for distribution to eager enthusiasts.

The “Show HN” post sparked considerable interest, with users peppering Jesse with questions about the project’s design, functionality, and potential applications. Jesse, clearly passionate about his creation, eagerly answered, demonstrating a deep understanding and enthusiasm for Roons.

Roons presents a unique opportunity to explore the fundamental principles of computation in a tangible and engaging way. It’s a refreshing departure from the increasingly abstract world of modern computing and offers a compelling alternative for anyone looking to understand how logic can be translated into physical action. If you’re curious about mechanical computing, or just looking for a truly unique and challenging project, Roons is definitely worth a look.