Anthropic’s Cardputer: Running Claude Code on a Card‑Sized ESP32‑S3 Board
Anthropic unveiled a tiny Cardputer—an ESP32‑S3‑based dev board the size of a credit card—that can run the full Claude Code model, and developers have already built playful demos like a shake‑controlled dark‑mode wand, a tilt maze game, and a miniature Oregon Trail adventure.
Cardputer hardware
Cardputer is a credit‑card‑sized development board produced by M5Stack. It is built around an ESP32‑S3 microcontroller and includes a mini QWERTY keyboard, a color LCD screen, a speaker, a gyroscope sensor, and other basic peripherals.
Running Claude Code on Cardputer
Anthropic demonstrated that the full Claude Code model can be executed on the Cardputer despite the board’s limited processing power and memory. The claim is that any task achievable through Claude can, in principle, be performed on this handheld device.
Demo projects built on the device
Magic wand – uses the gyroscope to detect a shake gesture and toggles the screen between light and dark mode.
Tilt maze game – a classic “Tilt” puzzle where an on‑screen marble is guided through a maze by tilting the Cardputer.
Oregon Trail text adventure – a survival‑style choose‑your‑own‑adventure where player choices determine the outcome.
Open‑source reference
All projects and the Claude integration are available in the open‑source repository:
https://github.com/dakshaymehta/cardputer-claude-os
Signed-in readers can open the original source through BestHub's protected redirect.
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