Observed arrival · 2026-10-17
Circuit Simulation Lab: 24 Browser-Based Engineering Calculators
A collection of circuit calculators and netlist checks that runs ngspice in the browser, covering topics from surge and ESD protection to PCB impedance and power integrity.
- For
- PCB designers and electronics engineers
- Worth noticing
- Its sample IEC 61000-4-5 table shows calculated values, reference values, error percentages, and the definitions behind the comparisons.
Field notes
The page exposes a validation table rather than relying only on a broad accuracy claim: sample IEC 61000-4-5 rows show calculated values, reference values, error percentages, and source definitions. It says the tools run ngspice in the browser and describes an offline Playwright check in which changing a surge-tool resistor changed the reported peak current from 34.3 A to 43.6 A without a network request. The homepage also says two via-stub comparisons with openEMS were suggestive, not conclusive.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue