CircuitForge

Build and flash microcontroller firmware straight from your phone. No computer required.

CircuitForge turns your Android device into a complete embedded workbench. Pick a board, add the modules you're wiring up, describe what you want it to do, and CircuitForge writes the firmware, compiles it in the cloud, and flashes it to your board over USB — the whole workflow, start to finish, on your phone.

── DESIGN YOUR CIRCUIT ──

Choose from 21 development boards and over 130 modules — sensors, displays, motor drivers, radios, storage, audio and more. Every board shows its real pinout, so you can see at a glance which pins support I2C, SPI, UART, PWM or analog input as you place each component. No guesswork, no datasheet hunting.

── GENERATE FIRMWARE WITH AI ──

Describe your project in plain English — "read a temperature sensor and show it on an OLED," or "blink an LED when motion is detected." CircuitForge writes complete, working firmware tailored to your exact board and module combination, with the correct libraries pulled in and every pin assigned for you.

── COMPILE IN THE CLOUD ──

Your firmware is built on a professional-grade cloud compiler — the same quality of build you'd get on a desktop setup, with none of the setup. Nothing to install, no toolchain to configure, no drivers to chase. Just tap Build.

── FLASH OVER USB ──

Connect your board with a USB OTG cable and flash it directly from your phone. CircuitForge speaks the native bootloader language of each board family, so flashing behaves exactly as it would from a computer — including boards that need special timing or button sequences, all handled for you.

── EDIT ANYTHING ──

Every generated sketch opens in a full code editor with syntax highlighting, search, and undo/redo. Tweak a value, change the logic, or rewrite it entirely — then rebuild and reflash without leaving the app.

── SUPPORTED BOARDS ──

• Arduino: Uno, Nano, Mega, Micro, Pro Micro, Pro Mini, Leonardo

• ESP32 family: ESP32 DevKit, ESP32-S3, ESP32-C3, ESP32-CAM

• ESP8266: NodeMCU, Wemos D1 Mini

• Raspberry Pi: Pico, Pico W, Pico 2, RP2040-Zero

• Others: STM32 Blue Pill, Teensy 4.0, Digispark

── WHAT YOU CAN BUILD ──

Temperature and humidity loggers. Motion-triggered alarms. OLED and LCD dashboards. Motor, servo and stepper controllers. Relay and home-automation projects. Addressable RGB lighting. Ultrasonic distance sensors. Data loggers to SD card. Bluetooth and WiFi-connected gadgets. If you can describe it, CircuitForge can help you build it.

── BUILT-IN SAFETY ──

Firmware that drives motors, relays or high-current loads is flagged before you flash, with a clear warning about what to disconnect first — so a stray output can't damage your project or your board.

── FREE TO USE ──

A free daily allowance covers regular hobby use. Watch a short video to refill it when you run low, or upgrade for a much larger allowance. Browse boards and modules freely — sign in only when you're ready to generate.

Whether you're a maker prototyping on the couch, a student learning embedded development, or an engineer who just wants to fix a firmware bug without digging out a laptop, CircuitForge puts the entire build-and-flash workflow in your pocket.

CircuitForge is made by Lunar Planet.