22 days ago
- Velxio is a free, open-source online circuit simulator featuring real-time SPICE-accurate analog simulation and hybrid digital+analog co-simulation.
- It supports 19 boards across 5 CPU architectures including Arduino, ESP32, RP2040, and ATtiny85, with emulation via avr8js, QEMU, and rp2040js.
- Users can build custom chips in C, Rust, or AssemblyScript using the Wokwi Custom Chips API and simulate with over 100 interactive components and live instruments like an oscilloscope.
- The simulator runs entirely in the browser with ngspice-WASM for analog circuits, requires no cloud or account, and offers offline capability when self-hosted via Docker.
- Key features include a Monaco Code Editor, arduino-cli compilation, serial monitor, library manager, multi-board canvas, and support for protocols like I2C, SPI, and PWM.