SimulationEmbed React island with click-to-activate iframes, theme sync
via postMessage/MutationObserver, and graceful fallback when SpiceBook
is unavailable. 12 simulations across 6 books (555 timer, op-amp,
semiconductor, formulas, communications, sensor). Books without
simulations render no extra markup. client:visible hydration defers
JS cost until scrolled into view.
Astro site with e-book reader for classic electronics notebooks.
15 Mims notebooks + 1 Ugly's Electrical Reference, served via
Docker/Caddy at mims.l.supported.systems. PDFs tracked with git-lfs.
