Welcome to Velxio
Velxio is an online electronics simulator. You place real boards and components on a canvas, wire them together, write the program in the built-in code editor, and press Play — your code compiles and runs on an emulated board, driving the components exactly like the real hardware would.
What you can simulate
Section titled “What you can simulate”- Boards: Arduino (UNO, Nano, Mega), the ESP32 family (classic, S3, C3 and more), Raspberry Pi Pico and Pico W, STM32 (Blue Pill, Black Pill, Discovery…), full Linux Raspberry Pi (Zero through 5) and ATtiny85.
- Components: LEDs, displays (OLED, TFT, LCD, e-paper), sensors, motors, logic ICs, analog parts and branded modules from DFRobot, Seeed, M5Stack and Grove.
- Languages: Arduino C++, MicroPython and ESP-IDF, depending on the board.
- Instruments: serial monitor, oscilloscope and more, to see what your circuit is really doing.
Where to go next
Section titled “Where to go next”- Build your first project — a blinking LED in five minutes.
- Take the interface tour to learn the canvas, the component picker and the code editor.
- Browse the examples gallery for ready-made circuits you can open with one click.