Small things, built to think with.
A notebook of interactive experiments — quick, mobile-friendly, often built with help from AI. Each one tries to make a single idea feel obvious.
Experiments
Two arms, infinite chaos
A double pendulum, simulated live. Nudge the starting angle a hair and watch two near-identical runs go their separate ways — chaos, made visible.
StatisticsThe Bean Machine
Drop beads through a wall of pegs and watch pure randomness pile up into a bell curve. Galton's classic, running in your browser.
PsychologyYour 5-factor personality profile
A short Big Five questionnaire that maps your answers onto the five trait dimensions psychologists actually use — no horoscopes involved.
RunningSpeed & Pace Meter
Flip between speed and pace, compare km and miles, and see what your numbers mean for a 5K, 10K, half, or full marathon.
More experiments on the way.
Add new widgets as ./name.html and link a card here.
About this lab
This corner of the site is where I keep small interactive things — usually one idea per page, usually built in an evening with help from a language model.
If you spot a bug or find a charming use for one of these, I'd love to hear. The proper CV, publications, and contact details live at drchawin.com.
— Chawin