SpeedCircuits 0.5 and openDAQ 3.40.3: from circuit simulation to traceable reference data

A clearer path from models to inspectable engineering evidence

The latest FermiLabs software work brings together two complementary capabilities without confusing simulation with hardware measurement:SpeedCircuits0.5.0for interactive circuit studies andArduino OpenDAQwithopenDAQ3.40.3for interoperable, provenance-aware reference signals.

SpeedCircuits: bounded experiments in the browser

SpeedCircuits extends its original 3D construction workspace with ngspice 47 WebAssembly circuit simulation, browser-local R/C parameter and tolerance studies, guided Bode plots, transfer-function and noise analysis, a reviewed Audio Lab PCM/WAV processing path and improved mobile-browser authoring controls. Guided analysis preserves units, reference topology and repeatable study/export evidence; incomplete probes or unsupported floating outputs fail closed rather than generating misleading measurements.

Arduino OpenDAQ: install, start, open and verify

The openDAQ 3.40.3 MVP completed an acceptedinstall → start → open → verifyworkflow on an owner Mac and aLinux ARM64UNO Q target. That test uses a deterministictwo-signal Reference Device, not physical analog acquisition. The Native path can preserveReferenceDomainInfoin a qualified host configuration; alternative LT transport paths retain explicit capability limitations.

Putting the methods together

A reproducible lab distinguishespredicted, simulated, referenced, replayed and measuredvalues. A learner can build a model in SpeedCircuits, examine solver results, then use openDAQ’s signal identity and timing model as part of a future measurement or comparison workflow. Physical sensor capture and external hardware interoperability must be qualified separately.

Projects affected:SpeedCircuits, Arduino OpenDAQ, and EFBus when a single-owner physical acquisition adapter is later admitted.

ExploreSpeedCircuitsandArduino OpenDAQ.