Free offline circuit simulator & transfer-function studio in a single HTML file: schematic → SPICE-grade simulation → H(s), Bode, root locus, state-space → suggested op-amp topology. Programmable MCU with an Arduino-style IDE built in (real 490 Hz PWM, Serial, hot-swap upload). 93 datasheet-verified ICs. EN/VN bilingual. Live at eerflab.com
education arduino offline-first atmega328p circuit-simulator spice state-space control-systems rf electrical-engineering power-electronics smith-chart filter-design s-parameters bode-plot opamp arduino-simulator root-locus transfer-function ic-simulation
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Updated
Aug 7, 2026