The idea

What is CRUMB?

Technology you can actually understand, fix, and build yourself — and a place to learn how.

What CRUMB is

CRUMB is a free library that teaches you to build real technology yourself — no four-year degree required. CRUMB isn't a product. It's a way of building: open, fixable, and yours.

If it's open and you can build it, it can be a CRUMB:

🤖 An AI companion 💡 A light for your room 🔊 A speaker 😴 A sleep tracker 🎮🕹️👾 A gaming computer 📝 A note taker 💭 Anything you can imagine!

How to use this site

1

Learn — walk through the fundamentals one piece at a time, like a course.

2

Build — step-by-step guides; every part listed, every step explained, with an "Ask AI" prompt when you get stuck.

3

Share — post what you build in the community, so the next person can build on it.

Why CRUMB exists

Technology should belong to everyone. CRUMB is a place to share what you build and to learn how to make it yourself — so good ideas get passed on instead of locked away. A library, built in the open, that outlasts any one person and stays useful to anyone who wants it.