Hardware · component

A 10x10mm Arduino-compatible board

A tiny Arduino-compatible board with a 10x10mm footprint, USB-C programming, five GPIO pins, two RGB LEDs and a touch pad. Posted as a fully vibe-coded art-board project.

Build sheet

Size: 10x10mm envelope
Programming: USB-C
Memory: 64 KB flash, 20 KB RAM
I/O: 5 GPIO, 2 RGB LEDs, touch pad

Can I build this?Expert · AI 2/5 · $20–60

Difficulty: Expert
AI-buildability: 2/5
Time: Several weeks
Cost: $20–60

Tools

SMD soldering ironhot air rework stationmicroscopePCB design software

Starter prompt

Based on "A 10x10mm Arduino-compatible board" on Afterware: https://afterware.xyz/p/a-10x10mm-arduino-compatible-board

Help me design firmware for a tiny Arduino-compatible board with USB-C programming, five GPIO pins, two RGB LEDs and one capacitive touch pad. Start with a blink and touch-to-change-color sketch that uses the Arduino core and a small set of pin definitions I can edit. Explain how to map the touch pad to a GPIO and debounce it.

Estimates based on the original write-up. How AI-buildability is scored. The maker built this with AI tools: more vibe-coded builds. Building with an AI assistant? Connect it to Afterware (free MCP server).

Story

Peter Kuhar describes this as a fully vibe-coded board, sized at a 10x10mm envelope and described as the smallest Arduino-compatible board made. It is intended for art projects.

The listed specs are USB-C for programming, five GPIO pins, two RGB LEDs, one touch pad, and 64 KB of flash with 20 KB of RAM. The post does not include photos, schematics, a layout, or a firmware repository, so the board's construction and build process are not documented beyond these notes.

The post is a short announcement with no links, so the claim of smallest Arduino-compatible board has not been checked against other boards.