A free circuit and microcontroller simulator for young makers
MicroVexa Studio lets you build circuits, write code for Arduino, ESP32, Raspberry Pi Pico and more, and watch it run — right in your browser. It is free, open source and needs no account.
What you can do
- Simulate Arduino Uno, Nano, Mega and ATtiny85 (real AVR8 emulation)
- Simulate Raspberry Pi Pico and Pico W (RP2040), including MicroPython
- Simulate ESP32, ESP32-S3 and ESP32-C3 boards
- Wire up 100+ parts: LEDs, buttons, sensors, displays, motors, NeoPixels
- Explore real analog circuits with SPICE, an oscilloscope, a voltmeter and an ammeter
- Design your own chips in C
- Get help from an optional AI helper using your own OpenAI, Gemini or Claude key — the key stays in your browser