Follows the same pattern as test_esp32_spice_analog.mjs and
test_esp32_spice_ntc_bridge.mjs: compile an ESP32 sketch on-the-fly via
/api/compile/, boot QEMU through the backend WebSocket, and sweep lux
levels while verifying analogRead() returns what ngspice solved.
The netlist uses the exact photodiode cards emitted by
frontend/.../componentToSpice.ts (D_<id> + I_<id>_ph + DPHOTO model), so
any drift in the frontend SPICE mapper surfaces here.
Validated against the live Docker container — lux=0/1000/2500 produce
raw=4095/2854/992, matching the expected 4095/2854/993 within ±1 LSB
and monotonically decreasing with brightness as expected.
The package-lock.json churn is a pre-existing drift: eecircuit-engine
was in package.json but missing from the lock — npm install re-added it.
Companion workflow change (registering the test in backend-e2e-tests.yml)
lives in a separate commit that requires a PAT with workflow scope to push.
Mirrors the /v2 page structure but targets the 2.5 launch: ngspice-WASM
analog simulation, hybrid digital + analog co-simulation with Arduino /
ESP32 / RP2040, expanded component catalog, live instruments, 40 new
analog/hybrid examples.
- Reuses Velxio2Page.css + SEOPage.css — no new stylesheet to maintain
- Adds SoftwareApplication, BreadcrumbList, and FAQPage JSON-LD for
rich-results eligibility
- Registers the route in App, entry-server (SSR prerender), and
seoRoutes (sitemap, priority 0.95 / changefreq weekly)
The SPICE emitter already reads properties.lux (default 500, 100 nA/lux)
but the UI had no way to set it — the static dialog rejected the "range"
control type and there was no entry in SENSOR_CONTROLS for the live panel.
- Add photodiode entry in SENSOR_CONTROLS (slider 0-1000 lux)
- Register a minimal PartSimulationRegistry handler that forwards slider
values via emitPropertyChange so the netlist memo invalidates
- Switch the photodiode lux control from "range" to "number" so the
static ComponentPropertyDialog renders an editable input
Loading an analog-only example removes every board. The single-board
branch of loadExample then called setBoardType, which only maps over
existing entries in boards[] and silently did nothing when the array
was empty — components rendered but no board. Fall back to addBoard +
setActiveBoardId when there are no boards.
- Modified the index file to reflect the new naming convention for Velxio components.
- Changed JSX declarations to use 'velxio-' prefix for various components.
- Updated component overrides to replace 'wokwi-' with 'velxio-' for logic gates and other components.
- Adjusted SVG generation script to use 'velxio-' prefix for BMP280 and Raspberry Pi components.
- Marked submodules as dirty in QEMU and RP2040 libraries.
- Added .prettierignore and .prettierrc.json for consistent code formatting.
- Introduced InstrumentComponent with support for Voltmeter and Ammeter, including pin information handling.
- Introduced RelayElements for SPDT relay representation.
- Added Resistor component for adjustable resistance in ohms.
- Created RiscVBoard component for visualizing a RISC-V chip.
- Implemented TransistorElements for BJT and MOSFET packages.
- Added Capacitor and CapacitorElectrolytic elements for capacitors.
- Introduced Inductor element for inductor representation.
- Updated index file to export new custom elements.
- Implemented a script to inject passive-component preset variants into `scripts/component-overrides.json`, including resistors, capacitors, and inductors with custom names and thumbnails.
- Added a new custom element `<wokwi-capacitor-electrolytic>` representing a polarized aluminum-can capacitor with appropriate SVG representation.
- Updated metadata generation to accommodate new component names and thumbnails for better user experience in the component picker.
- Marked submodules `qemu-lcgamboa` and `rp2040js` as dirty to reflect local changes.
- Replaced syncStoreProperty function with emitPropertyChange to decouple parts from Zustand store.
- Updated relay component mapping to ensure proper handling of coil and contact states.
- Added new test cases for half-wave rectifier and relay-controlled LED to ensure correct functionality.
- Introduced InlineComponentSVGs for schematic-style icons of various components.
- Updated submodule references for qemu-lcgamboa, rp2040js, and wokwi-elements to indicate dirty state.
- Implement `ammeter-waveform.test.ts` to validate AC readings from a sine wave source.
- Create `capacitor-charge-transient.test.ts` to test the charging response of an RC circuit driven by a microcontroller pin.
- Introduce `esp32-rectifier-integration.test.ts` for testing rectifier behavior using QEMU and ESP32.
- Add helper functions in `esp32RectifierE2E.ts` for the rectifier test harness.
- Develop `voltmeter-waveform.test.ts` to ensure correct AC and DC readings from a sine wave source.
- Implement unit tests for waveform statistics in `waveform-stats.test.ts` to validate RMS, mean, peak, and interpolation functions.
- Create `waveformStats.ts` to provide statistical functions for time-domain waveform analysis.
- Implement `serial-batching.test.ts` to verify the behavior of `createSerialBatcher`, ensuring it coalesces multiple appends into a single flush, preserves byte order, and groups by board.
- Create `spice-rectifier-integration.test.ts` to test the end-to-end functionality of the Half-Wave Rectifier example, covering the entire simulation pipeline from input building to circuit solving.
- Add `spice-rectifier-live-repro.test.ts` to reproduce a live-app failure scenario, tracing through each layer of the simulation to identify potential failure points.
- Introduce `spice-signal-generator-tran.test.ts` to validate the behavior of the signal generator and ensure correct analysis type switching based on circuit components.
- Establish `serialBatcher.ts` to implement a batching mechanism for USART output, reducing the frequency of store updates and preventing React's maximum update depth error.
- Decoupled electrical simulation from the simulator store, ensuring SPICE is always active for accurate circuit analysis.
- Removed feature flag for electrical simulation, simplifying the state management.
- Preloaded SPICE engine at app start to eliminate latency during the first solve.
- Added comprehensive tests for MOSFET PWM LED behavior and NPN transistor switch functionality, ensuring correct current flow and response to pin states.
- Implemented diagnostics for floating input nodes in RC low-pass filter circuits, addressing singular matrix issues in SPICE simulations.
- Introduced active semiconductor metadata registry for better component management and simulation fidelity.
- Updated Vite configuration to force re-bundling of local wokwi-elements after component additions.
Documents 5 issues found in production logs: RPi3 missing QEMU boot
files (51 hits), ESP32-S3 unsupported machine type, WebSocket race
condition, Google OAuth unhandled 400, and the uvicorn keepalive crash
that was mitigated in 8e3c00e.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
fix: increase timeout for compilation requests to 180 seconds
refactor: call recalculateAllWirePositions after loading examples
chore: update subproject commit for rp2040js to dirty state
chore: update subproject commit for wokwi-elements to dirty state
generate-sitemap.mjs was only scanning examples.ts for example IDs using a
textual regex. With the 40 new circuit examples living in a separate file
(examples-circuits.ts), they were missing from the generated sitemap.xml
and therefore invisible to search engines / SSR prerender URL list.
Now the generator reads both source files and merges their example IDs.
Also includes auto-applied formatting changes to generate-component-metadata.ts.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Previously examples.ts pushed to exampleProjects[] after declaration, which
some bundlers can treat as dead code under aggressive tree-shaking. This
also made HMR unreliable when examples-circuits.ts changed.
Now:
const legacyExamples = [...]
export const exampleProjects = [...legacyExamples, ...circuitExamples]
Single immutable export. Guaranteed to include all 150 examples at import
time. The gallery (ExamplesGallery.tsx) and SSR prerender (entry-server.tsx)
both pick up the new circuit examples automatically.
Also adds frontend/src/__tests__/examples-circuits.test.ts with 5 assertions
to catch future regressions (all circuit ids present, no duplicates, valid
required fields, expected categories covered).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Previously uvicorn was launched with `&` while nginx ran with `exec`, so if
the backend crashed (e.g. the `AssertionError` in websockets' keepalive_ping
that took prod down for ~31h), nginx kept the container "up" and every
/api/* request returned 502. Now both processes are monitored with
`wait -n`; whichever dies first triggers the entrypoint to exit, letting
`restart: unless-stopped` recover the container cleanly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds frontend/src/data/examples-circuits.ts with 40 new examples organized
into 6 categories, each demonstrating a specific analog/digital/electromech
concept that the SPICE engine can simulate end-to-end:
PASSIVE / ANALOG (10):
voltage-divider, rc-low-pass-filter, wheatstone-bridge,
ntc-temperature, led-current-limiting, parallel-resistors,
pot-adc-reader, photoresistor-light, multi-led-bar,
capacitor-charge-curve
TRANSISTOR / SEMICONDUCTOR (8):
npn-led-switch, pnp-high-side-switch, mosfet-pwm-led,
diode-rectifier, zener-regulator, schottky-reverse-protection,
bjt-common-emitter, darlington-high-current
OP-AMP (5):
opamp-inverting, opamp-voltage-follower, opamp-comparator,
opamp-difference, opamp-schmitt-trigger
LOGIC GATES (6):
and-gate-alarm, xor-toggle-detector, nand-sr-latch,
full-adder, binary-counter-leds, logic-probe
ELECTROMECHANICAL (4):
relay-led-switch, optocoupler-signal,
l293d-motor-control, l293d-speed-pwm
POWER / REGULATOR (3):
power-supply-7805, lm317-adjustable-psu, battery-voltage-monitor
BOARD-SPECIFIC (4):
esp32-dual-adc, mega-multi-led, nano-sensor-station,
esp32-pwm-led-rgb (uses ESP32 LEDC peripheral)
The new examples are appended to exampleProjects[] in examples.ts so the
existing gallery and category filters pick them up automatically.
test/test_circuit/test/spice_examples.test.js validates each example's
analog topology in ngspice — 45 individual assertions covering all 40
examples (plus extra cases for NTC/Zener sweeps and L293D direction).
Sandbox tally: 164 -> 209 tests, 7.9s runtime, all green.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds three new test steps to backend-e2e-tests.yml:
- ngspice smoke test (standalone, no backend needed)
- ESP32 voltage divider co-simulation (compile + QEMU + ngspice ADC injection)
- ESP32 Wheatstone bridge co-simulation (NTC temperature sweep)
These run alongside the existing DHT22/HC-SR04/MPU6050/MicroPython tests
using the same QEMU .so libraries and ESP32 Arduino core 2.0.17.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Three new end-to-end tests that combine ESP32 QEMU emulation (via backend
WebSocket) with ngspice-WASM analog circuit solving:
1. test_esp32_spice_analog.mjs — voltage divider sweep
- Compiles a sketch that reads analogRead(34)
- Solves two voltage dividers with ngspice (R1/R2=10k/10k then 10k/30k)
- Injects solved V(mid) into ESP32's ADC via esp32_adc_set
- Verifies Serial output matches within +-50 counts (12-bit ADC)
- Confirms circuit change is detected (different ADC values)
2. test_esp32_spice_ntc_bridge.mjs — Wheatstone bridge temperature sweep
- NTC thermistor in a bridge (0C / 25C / 50C)
- ngspice solves the bridge for each temperature
- ESP32 reads both legs (ADC34+ADC35), computes R_ntc and T via beta model
- Verifies temperature within +-5C tolerance across sweep
3. test_esp32_spice_smoke.mjs — ngspice-only smoke test (no backend needed)
Also adds eecircuit-engine to test/backend/e2e/package.json.
Prerequisites: backend on localhost:8001 with esp32 core installed.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Electrical simulation is now active by default (mode='spice' instead of
'off') — users no longer need to toggle the mode on manually. The engine
lazy-loads on first solve, so there is no startup cost penalty.
Changes:
- useElectricalStore: default mode = 'spice' when ELECTRICAL_SIM_ENABLED
- subscribeToStore: ADC_PIN_MAP expanded to all 18 board types (Uno, Nano,
Mega with 16 ADC channels, ATtiny85, RP2040 GP26-29, ESP32/S3/C3 GPIO
ADCs). Voltages from SPICE solutions now inject into MCU ADC peripherals
for all boards.
- BasicParts LED: reads branchCurrents from useElectricalStore when SPICE
is active. Brightness = clamp(|I_led| / 20mA, 0, 1) instead of boolean.
Subscribes to store changes to update in real time.
- ElectricalOverlay: shows per-wire voltage labels (gold monospace on dark
pill) using buildWireNetMap() which replicates the NetlistBuilder's
Union-Find to map wireId -> netName -> nodeVoltage. Summary pill shows
net count + solve time.
- NetlistBuilder: new export buildWireNetMap() for lightweight wire-to-net
resolution without running ngspice.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds 44 SPICE mappers, 58 custom metadata entries, and 12 visual
Web Components covering logic gates, transistors, op-amps, regulators,
sources, electromechanical parts and integrated-circuit packaging.
Fase 9 — component catalog expansion
------------------------------------
- 7 logic gates (AND/OR/NAND/NOR/XOR/XNOR + NOT) as SPICE B-sources
- 8 multi-input gates (AND/OR/NAND/NOR with 3 and 4 inputs)
- 9 transistors: 5 BJTs (incl. PNP 2N3906/BC557) + 4 MOSFETs (incl.
P-channel IRF9540/FQP27P06). NMOS refactored from Level=3 W=0.1
(hangs ngspice) to Level=1 with sane W/L
- 5 op-amps: LM358, LM741, TL072, LM324 with per-chip saturation
rails + opamp-ideal
- 4 linear regulators (7805, 7812, 7905, LM317) with dropout
- 3 batteries (9V, AA, coin-cell) with realistic ESR
- Signal generator (sine / square / DC)
- 2 Schottky diodes (1N5817, 1N5819) + photodiode (lux-driven
current source)
Fase 10 — electromechanical + ICs
---------------------------------
- Relay (SPDT): coil + L + S-switch with native hysteresis +
flyback diode, inverted-control trick for the NC contact
- Optocouplers 4N25 and PC817 (LED + CCCS with CTR=0.5 / 1.0)
- 7 74HC ICs as DIP-14 packages emitting 4 or 6 B-sources per
component (first mapper pattern emitting multiple device cards)
- 3 flip-flops (D, T, JK) — digital-sim only (edge detection is
not representable in ngspice .op)
- L293D dual H-bridge motor driver
Infrastructure
--------------
- scripts/component-overrides.json gains a _customComponents[] array
that lets new Velxio-only parts survive metadata regeneration
(previously applyOverrides() could only patch wokwi-elements
components that had already been scanned)
- scripts/generate-component-metadata.ts injects custom entries
before the patch loop
- New ComponentCategory values: 'logic', 'analog', 'electromech'
- frontend/src/components/DynamicComponent.tsx PASSIVE tracing
extended from just ['resistor','resistor-us'] to 9 two-terminal
passives with per-part pin name maps
- New CI workflow test-circuit.yml runs the sandbox on push/PR
- frontend-tests.yml regenerates metadata and fails if committed
JSON is stale
- Documented 2 new ngspice gotchas in circuit-emulation-gotchas.md:
unicode in netlist titles silently hangs the parser, and
MOSFET Level=3 + W=0.1m causes .op to hang
- 164/164 sandbox tests passing in ~9 s (was 88 pre-fase-9)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Implemented Bmp280Element as a custom web component for the BMP280 barometric sensor, including SVG representation and pin configuration.
- Created CircuitPreview component to render circuit thumbnails using SVGs of components, including support for various boards and components.
- Added a script to generate SVG files from wokwi-elements, ensuring proper formatting and structure for reliable rendering.
- Introduced a test HTML generation script to visualize component SVGs.
- Implemented ExampleDetailPage for individual example projects with SEO metadata.
- Updated routing to use ExampleDetailPage instead of ExampleLoaderPage.
- Enhanced sitemap generation to include example project URLs.
- Added prerendering support for example detail pages in the server entry.
- Improved SEO handling in ProjectByIdPage to dynamically set metadata based on project visibility.
- Refactored example ID extraction from examples.ts for sitemap generation.
- Updated console logs to reflect total URLs generated in sitemap.
- Implemented a comprehensive test script (test_micropython_pico.mjs) that performs the following:
- Part 1: Checks backend compilation of a simple Arduino sketch for the rp2040:rp2040:rpipico board.
- Part 2: Downloads MicroPython v1.20.0 UF2 firmware and loads it into a rp2040js simulator.
- Part 3: Simulates the Pico, verifies REPL output, and checks execution of injected Python code.
- Includes detailed logging and error handling for each step of the process.
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