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Apr 15, 2026

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Arctan of My Latitude Times a Week Without Sun

Ordered brass and a protractor before realizing I'd committed to a hobby that requires going outside and waiting for the sun.

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code-a-day

Rotating Vectors Without Floating Point

CORDIC Algorithm 🔗 Sundial Making

Sundials need sine and cosine. Early calculators had no multiplier. CORDIC solved both.

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🎮 Shadow Scribe Draw hour lines on a sundial by observing where the gnomon's shadow falls as the sun arcs across the sky.