velxio/test/test_circuit/plan/phase_1_libraries.md

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feat: electrical simulation via ngspice-WASM (eecircuit-engine) Adds full SPICE-accurate electrical simulation to Velxio, behind a lazy- loaded ⚡ toolbar toggle. Arduino / ESP32 / RP2040 sketches now co-simulate with real analog behaviour: correct voltages on wires, real I–V curves on LEDs, working potentiometers, NTC thermistors read by analogRead(), PWM driving RC filters, transistors, op-amps, diodes, MOSFETs, etc. Engine: eecircuit-engine (ngspice compiled to WebAssembly). Main bundle stays at 2.4 MB; the 20 MB SPICE chunk only loads when the user activates electrical mode. Disabled at build time via VITE_ELECTRICAL_SIM=false. Frontend additions: - simulation/spice/: SpiceEngine wrapper + lazy entry, NetlistBuilder with UnionFind over wires, componentToSpice mapping (24 metadataIds incl. real part numbers: 2N2222, 2N3055, BC547, IRF540, 2N7000, 1N4148, 1N4007, 1N4733, LEDs, NTC, op-amp ideal), CircuitScheduler with debounced coalescing, AVRSpiceBridge for quasi-static co-simulation. - store/useElectricalStore: Zustand slice, feature-flag aware. - components/analog-ui/: ⚡ toolbar toggle + SVG voltage overlay. - components/components-instruments/: Voltmeter, Ammeter probes. - 62 tests (spice-*, netlist-builder, component-to-spice, instruments). Sandbox (test/test_circuit/): 47-test validation sandbox that proved the approach (hand-rolled MNA baseline + ngspice pipeline) before porting to the app. Kept as reference. Docs: docs/wiki/circuit-emulation-*.md (13 engineering pages covering architecture, solvers, components, AVR bridge, gotchas, performance, integration plan, API reference, appendix) + electrical-simulation- user-guide.md (end-user facing). Reference plan: test/test_circuit/plan/phase_8_velxio_implementation.md Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-15 19:11:54 +07:00
# Fase 1 — Librerías
## Evaluadas
| Librería | Decisión | Razón |
|---|---|---|
| `eecircuit-engine` (ngspice WASM) | **DESCARTADA** para esta sandbox | 40 MB bundle, lazy-load complejo, overkill para validar el concepto. Reconsiderar en integración final. |
| `circuit-json` | **DESCARTADA** para esta sandbox | Tipos buenos pero innecesarios; el modelo propio es más pequeño y suficiente. |
| `circuit-json-to-spice` | **DESCARTADA** | Sin SPICE backend no aplica. |
| `mathjs` | **ADOPTADA** | Inversión LU, resolución `Ax=b`, manejo de matrices densas. MIT, ~650 kB, sin build step. |
| `avr8js` | **ADOPTADA** | Misma usada por Velxio — los tests deben ejercitar la misma API. |
| `vitest` | **ADOPTADA** | Runner de pruebas rápido, compatible con ESM, mismo que el frontend. |
## Descartadas sin probar
- `spicejs`, `ecsim`, `zsim` — o sin mantenimiento o sin API programática.
- `ngspice` nativo — el binario requiere compilación y no corre en browser.
## Decisión final
Implementar el **solver MNA (Modified Nodal Analysis) propio** en JS. Es pequeño (< 500 líneas), transparente, y fácil de integrar después en Velxio si el experimento funciona.