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# Velxio — Introduction
**Velxio** is a fully local, open-source Arduino emulator that runs entirely in your browser.
Write Arduino C++ code, compile it with a real `arduino-cli` backend, and simulate it using true AVR8 / RP2040 CPU emulation — with 48+ interactive electronic components, all without installing any software on your machine.
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## Why Velxio?
- **No installation required** — everything runs in the browser.
- **Real emulation** — not a simplified model, but accurate AVR8 / RP2040 CPU emulation.
- **Interactive components** — LEDs, buttons, potentiometers, displays, sensors, and more.
- **Open-source** — inspect, modify, and self-host it yourself.
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## Supported Boards
| Board | CPU | Emulator |
|-------|-----|----------|
| Arduino Uno | ATmega328p @ 16 MHz | avr8js |
| Arduino Nano | ATmega328p @ 16 MHz | avr8js |
| Arduino Mega | ATmega2560 @ 16 MHz | avr8js |
| Raspberry Pi Pico | RP2040 @ 133 MHz | rp2040js |
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## Documentation
### Getting Started
- [Getting Started ](./getting-started.md ) — Quick setup guide (hosted, Docker, manual)
- [Introduction ](./intro.md ) — Overview, supported boards, quick links
### Architecture & Internals
- [Architecture ](./ARCHITECTURE.md ) — High-level project architecture
- [Emulator Architecture ](./emulator.md ) — How CPU emulation works layer by layer
- [Wokwi Libraries Integration ](./WOKWI_LIBS.md ) — Local wokwi-elements, avr8js, rp2040js setup
### Boards & Emulation
- [RP2040 Emulation ](./RP2040_EMULATION.md ) — Raspberry Pi Pico / Pico W in-browser emulator (ARM Cortex-M0+)
- [Raspberry Pi 3 Emulation ](./RASPBERRYPI3_EMULATION.md ) — BCM2837 / QEMU raspi3b, Python + GPIO shim
- [ESP32 Emulation ](./ESP32_EMULATION.md ) — Full Xtensa QEMU emulation (GPIO, ADC, PWM, WiFi, I2C, SPI, RMT)
- [RISC-V Emulation ](./RISCV_EMULATION.md ) — ESP32-C3 / XIAO-C3 in-browser emulator
### Components & Examples
- [Components Reference ](./components.md ) — All 48+ supported electronic components
- [Example Projects ](./examples/README.md ) — Built-in example gallery
### API & Integrations
- [MCP Server ](./MCP.md ) — Model Context Protocol server for AI agent integration
### Project Status
- [Roadmap ](./roadmap.md ) — Implemented, in-progress, and planned features
- [Setup Complete ](./SETUP_COMPLETE.md ) — Feature implementation status log
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## Community & Links
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- [Live Demo ](https://velxio.dev )
- [GitHub Repository ](https://github.com/davidmonterocrespo24/velxio )
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- [Discord ](YOUR_DISCORD_INVITE_URL ) — Ask questions, share projects, report issues