Standalone explainers, one directory per project. Each is self-contained: a finished document plus whatever source or code produces it. Where a project asserts a number, the script that measures it sits in the same directory.
An interactive map of E, B and S = E×B/μ₀ everywhere in the plane around a battery–wire–LED circuit. Grab the wire, reshape it, and the fields re-solve as you drag. Along a resistanceless wire E meets the metal at exactly a right angle; push the resistance slider off zero and the field tilts over — that tilt is E = ρJ. The energy never travels inside the wire: S leaves the battery sideways into empty space, glides along beside the wire, and turns inward at the LED.
The same circuit, with the plane restriction lifted: the loop lives in space, and so does the field. Orbit the scene, zoom, move a slice plane through it, and reshape the wire by dragging handles in the plane of the screen. The planar bench had to answer “what does B look like?” with ⊗ and ⊙ marks, because a flat circuit's magnetic field points purely in and out of the page. Here the field lines show up as what they are: closed rings threaded on the wire, which a solenoid gathers into a bundle down its axis. No WebGL and no dependencies — the scene is projected by hand onto a 2D canvas.
The battery comes on over a few nanoseconds, and you watch the field find out. A circuit diagram implies the load learns about the battery the instant the switch closes; it doesn't. Before the switch there is no field at all, then a front of it sweeps outward at c — and the colour map goes exactly black outside that front, not dim. Meanwhile the loop's own inductance holds the current back, so the current lags the EMF by L/R, and energy reaches nothing until both fields do. The inductance is not assumed: it falls out of the same geometric kernel the charge solve uses, and comes within a percent of the textbook ring formula that appears nowhere in the code.
Two single-page posters, each authored as one self-contained HTML file and exported to PDF. E8 Static Poster runs from the Planck scale down to the Standard Model: Calabi–Yau compactification, inflation, gaugino condensation breaking supersymmetry, and the VEV cascade E₆ → SO(10) → SU(5) → SM. Heterotic String Lagrangian gives the complete ten-dimensional string-frame action in three lines, then breaks it out field by field.
A broadside on a single claim: the quantum amplitude of interacting strings is, integrand for integrand, the same mathematical object as the statistics of thermal fluctuations of electrical power across a two-dimensional resistive copper plane — each particle's momentum becoming a current injected at a point on the board's edge. It is the Coulomb-gas representation of the Koba–Nielsen amplitude. Every number it quotes comes from a verification script in the same directory.