The Exhibits
The Vote
Majority voting, von Neumann’s threshold, and why the spare on Ariane 5 failed too.
Scratch the Code
A real QR code you can deface, and the Reed–Solomon decoder that repairs it live.
Where Am I
GPS as circles and a bad clock, and why altitude is always the sloppiest number.
Two Wrong Answers
A Kalman filter blends noisy GPS with a drifting accelerometer, and learns the drift.
Light Through a Finger
How a pulse oximeter reads oxygen, what fools it, and your own pulse through the camera.
Drop It on Purpose
Why a router that refuses to drop packets ruins your video call, and the fix.
The Lab
The six exhibits above are well-known ideas, remixed. These four are attempts at things that don't exist yet as something you can play with. Each one links to its own page, where you'll find the design and a build plan, and the status tag says how far along it is.
The Liar's Game
Twenty questions against an opponent allowed to lie. The math that catches it is error correction with feedback.
Traitors, Pass-the-Phone
A party game that runs the Byzantine Generals protocol. With three players the loyal side can't win reliably; with four it always does.
Your Phone's Fingerprint Is Its Flaws
Factory calibration errors in your motion sensors form a stable ID. See yours, entirely on your device.
Tear-Proof Secrets
Split a password across printable tags so that any three of five rebuild it, and two reveal nothing.