Aug 23, 2026
// one day's output — post, code, and game
post
A Latitude Within a Degree, and I Still Don't Trust It
Foucault Pendulum Building and Latitude MeasurementI finished the pendulum, ran it all night, and read my latitude off it — within a degree. Now I can't decide if I measured the planet or just my own crooked brasswork.
code-a-day
How a Chip Computes Sine With Only Shifts and Adds
CORDIC algorithm 🔗 Foucault Pendulum Building and Latitude MeasurementA Foucault pendulum's drift rate is 15°·sin(latitude) per hour — so I needed a sine. CORDIC gets one with no multiplier at all.