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Card 148 of 9932026-09-21 issue

Observed arrival · 2026-09-21

Circuit Lab: Watch a Circuit Become a Matrix

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Editorial interest 78/100 Selection signal · not a rating of the site

An interactive AC/DC circuit simulator that connects live traces and phasors to state-space mathematics.

Landing page captured for the 2026-09-21 issue.
For
Students and hobbyists exploring circuit dynamics
Worth noticing
It links a state-space equation, live simulation traces, eigenvalues, and phasors in one interface.

Field notes

The interface exposes resistance, inductance, capacitance, and drive-frequency settings, then presents outputs including capacitor-voltage peak, current peak, impedance magnitude, and phase angle. Its mathematical framing uses dx/dt = Ax with state vector [i, v_C]ᵀ, while the Jarvis panel offers targeted explanations about complex eigenvalues and critical damping. The page attributes the project to Ali and describes it as community-built.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

OpenPublic substance visible
PrettyNotable craft visible
ProPolished or operationally mature
NicheUnusually specific use

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circuitlab.dev

Landing page observed 2026-09-21. The live site may have changed.