- 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>
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>
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>
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 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.
refactor: Update wiring examples for E32 OLED integration; correct pin mappings for VCC, GND, DATA, and CLK
test: Improve unit tests for ESPIDFCompiler; add scenarios for library resolution and CMake patching
chore: Mark subproject commits as dirty for wokwi-libs
- Implement tests for BMP280, DS1307, DS3231, I2CWriteSink, and MPU6050 slaves in test_i2c_slaves.py.
- Create test suite for Velxio MCP server tools in test_mcp_tools.py, covering Wokwi utilities and circuit management functions.
- Add tests for parsing WiFi and BLE serial output in test_wifi_status_parser.py, ensuring correct status events are captured.
- Updated the threshold for switching to data mode in MPU6050Slave from 2 to 3 WHO_AM_I reads to ensure correct chip identification.
- Enhanced comments in the code to clarify the sequence of I2C events during initialization.
- Added a new test file `test_mpu6050_emulation.py` to validate the MPU6050Slave state machine and ensure it handles the full Adafruit_MPU6050::begin() event sequence correctly.
- Updated existing tests to reflect the changes in the I2C handling logic.
- Modified `components-metadata.json` to update the generated timestamp.
- Marked submodules `rp2040js` and `wokwi-elements` as dirty to reflect local changes.
- Created a new DocsPage component for project documentation with links to GitHub and Discord.
- Added Arduino sketch for serial communication test between Raspberry Pi and Arduino.
- Implemented avr_runner.js to emulate ATmega328P and bridge serial communication over TCP.
- Developed a Python test script to validate the serial integration between the emulated Raspberry Pi and Arduino.
David Montero Crespo