Why most "free" online circuit simulators break on simple circuits (and what actually works)

Описание и применение

Многие бесплатные онлайн‑симуляторы схем ограничивают количество компонентов и выдают непонятные ошибки, что мешает даже простым задачам, как делитель напряжения. Автор анализирует ограничения, объясняет типичные ошибки и рекомендует реальные бесплатные инструменты: Falstad, EasyEDA, CircuitLab и CircuitForge.

Задача

Free online circuit simulators often impose component limits or lack proper error diagnostics, preventing users from building even basic circuits like a loaded voltage divider.

Результат

Users gain clarity on which free simulators truly support basic circuits, understand typical solver errors, and can select the right tool for their workflow.

Рабочий процесс

• 1. Search for free online circuit simulators. 2. Review pricing pages and tier limits. 3. Test a loaded voltage divider (5 components). 4. Observe component caps or lack of saving. 5. Identify error messages (Singular Matrix, Convergence Failed). 6. Learn common causes: missing ground, floating nodes, zero-resistance loops. 7. Evaluate tools: Falstad (free, no caps), EasyEDA (free, ngspice), CircuitLab (paid, accurate), CircuitForge (free, 3D breadboard).
• 8. Choose tool based on project goals and budget. 9. Export designs if using tools with upcoming EOL (e.g., Multisim Live).

Доказательства

A lot of popular options market themselves as free simulators, but their free tiers cap out before you can build a single real-world circuit.

Источник

When a simulator throws a "Singular Matrix" or "Convergence Failed" error, it means the matrix cannot be inverted mathematically.

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If you rely on Multisim Live, NI has scheduled its End-of-Life for September 15, 2026.

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