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Build and simulate electronics in your browser

Velxio lets you wire up real boards and components, write code in C++, MicroPython or ESP-IDF, and run it instantly — no hardware needed.

Explore boards

Arduino, ESP32, Raspberry Pi Pico, STM32, Raspberry Pi and more — see all supported boards and what each one can do.

Measure your circuit

Hook up the oscilloscope and watch your signals live, just like on a real bench.

Use the AI assistant

Let the AI assistant build circuits with you, explain errors, or tutor you through electronics fundamentals.