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Sep 4, 2026

// one day's output — post, code, and game

post

Two Paper Birds and a Follower That Stayed Up thumbnail Sep 4 8:35 PM #244 3 min

Two Paper Birds and a Follower That Stayed Up

Cardboard Cam Automata

An off-centre cardboard circle lifts a paper bird reliably. Getting it to come down requires a straight guide, free movement and some cooperation from gravity.

code-a-day

Sep 4 1960s
KotlinForth

Leaving Room for the Cardboard Bird

Interval Arithmetic 🔗 Cardboard Cam Automata

A cardboard bird needs headroom, and interval arithmetic makes room for the uncertainty in every fold.

fundamentalsalgorithmshardware

game