# Adafruit METRO

The Adafruit METRO is an Arduino Uno equivalent board designed with a few extra features to improve upon the original Uno. We sure love the ATmega328, and we use it a lot for our own projects. The processor has plenty of GPIO, analog inputs, hardware UART, SPI and I2C, timers, and PWM galore. All the hardware you need for most simple projects. When we need to go small, we use a [Metro Mini](https://www.adafruit.com/product/2590) which crams all that Metro goodness into a breadboard-friendly stick. For more advanced projects, we upgrade to the [Metro M0 Express](https://www.adafruit.com/product/3505), it is shield compatible and comes with a massive memory and speed upgrade and even runs [CircuitPython](https://learn.adafruit.com/adafruit-metro-m0-express-designed-for-circuitpython/circuitpython). With Express you'll get where you're going even faster!


- [Using DVI Video in CircuitPython](https://learn.adafruit.com/using-dvi-video-in-circuitpython.md)
- [Tile-Matching Game on the Fruit Jam and Metro RP2350](https://learn.adafruit.com/tile-matching-game-on-the-adafruit-metro-rp2350.md)
- [Larsio Paint Music](https://learn.adafruit.com/larsio-paint-music.md)
- [Using a Mouse with USB Host](https://learn.adafruit.com/using-a-mouse-with-usb-host.md)
- [Match3 Game on the Fruit Jam and  Adafruit Metro RP2350](https://learn.adafruit.com/match3-game-on-metro-rp2350.md)
- [Create a Memory Game on Fruit Jam Metro RP2350](https://learn.adafruit.com/create-a-memory-game-on-metro-rp2350.md)
- [Flappy Nyan Cat Game on Fruit Jam and Metro RP2350](https://learn.adafruit.com/flappy-nyan-cat-game-on-metro-rp2350.md)
- [Return to The Matrix with the Metro RP2350 or Fruit Jam](https://learn.adafruit.com/return-to-the-matrix-with-the-metro-rp2350.md)
- [Animating Animatronics](https://learn.adafruit.com/animating-animatronics.md)
- [Which CircuitPython Board is Right for You?](https://learn.adafruit.com/choose-your-circuitpython-board.md)
- [Adafruit Metro ESP32-S3](https://learn.adafruit.com/adafruit-metro-esp32-s3.md)
- [Adafruit Metro RP2040](https://learn.adafruit.com/adafruit-metro-rp2040.md)
- [Use Docker to Compile Linux for ESP32-S3](https://learn.adafruit.com/docker-esp32-s3-linux.md)
- [Ambient Sound Machine](https://learn.adafruit.com/ambient-machine.md)
- [Computer Perfection Synthesizer](https://learn.adafruit.com/computer-perfection-synthesizer.md)
- [Adafruit Metro M7 1011 with AirLift](https://learn.adafruit.com/adafruit-metro-m7-with-airlift.md)
- [Adafruit 1.69" 280x240 Round Rectangle Color IPS TFT Display](https://learn.adafruit.com/adafruit-1-69-280x240-round-rectangle-color-ips-tft-display.md)
- [Stream Deck controlled RGB Message Panel using Adafruit IO](https://learn.adafruit.com/stream-deck-controlled-rgb-message-panel-using-adafruit-io.md)
- [Adafruit Metro M4 Express AirLift (WiFi)](https://learn.adafruit.com/adafruit-metro-m4-express-airlift-wifi.md)
- [Adafruit Metro M4 Express featuring ATSAMD51](https://learn.adafruit.com/adafruit-metro-m4-express-featuring-atsamd51.md)
- [RGB Matrix Automatic YouTube ON AIR Sign](https://learn.adafruit.com/rgb-matrix-automatic-youtube-on-air-sign.md)
- [CircuitPython Connected Weather Cloud Lamp](https://learn.adafruit.com/circuitpython-connected-weather-cloud.md)
- [Tiny Autostereogram Construction Kit](https://learn.adafruit.com/tiny-autostereogram-construction-kit.md)
- [ePaper Maze Maker](https://learn.adafruit.com/epaper-maze-maker.md)
- [eInk / ePaper Weather Station](https://learn.adafruit.com/epaper-weather-station.md)
- [ePaper Calendar Featuring Metro M4 Express Airlift and Tri-Color ePaper Shield](https://learn.adafruit.com/epaper-calendar-featuring-metro-m4-express-airlift-and-epaper-shield.md)
- [How to Program SAMD Bootloaders](https://learn.adafruit.com/how-to-program-samd-bootloaders.md)
- [MakeCode Maker](https://learn.adafruit.com/makecode-maker.md)
- [Neon LED Signs](https://learn.adafruit.com/led-neon-signs.md)
- [Digital Circuits 7: MCUs... how do they work?](https://learn.adafruit.com/mcus-how-do-they-work.md)
- [Debugging CircuitPython On SAMD w/Atmel Studio 7](https://learn.adafruit.com/circuitpython-samd-debugging-w-atmel-studio-7.md)
- [Digital Circuits 6: An EPROM Emulator](https://learn.adafruit.com/digital-circuits-6-eprom-emulator.md)
- [Mystery Box: NeoMatrix Mk I](https://learn.adafruit.com/mystery-box-neomatrix-mk-i.md)
- [Programming an M0 using an Arduino](https://learn.adafruit.com/programming-an-m0-using-an-arduino.md)
- [Experimenter's Guide for Metro](https://learn.adafruit.com/experimenters-guide-for-metro.md)
- [Adafruit Metro Mini](https://learn.adafruit.com/adafruit-metro-mini.md)
- [Metro Minimalist Clock](https://learn.adafruit.com/metro-minimalist-clock.md)
- [DAC Hacks for Circuit Playground Express & other ATSAMD21 Boards](https://learn.adafruit.com/circuit-playground-express-dac-hacks.md)
- [Adafruit Metro M0 Express](https://learn.adafruit.com/adafruit-metro-m0-express.md)
- [Debugging the SAMD21 with GDB](https://learn.adafruit.com/debugging-the-samd21-with-gdb.md)
- [Ladyada's Learn Arduino - Lesson #2](https://learn.adafruit.com/ladyadas-learn-arduino-lesson-number-2.md)
- [Ladyada's Learn Arduino - Lesson #1](https://learn.adafruit.com/ladyadas-learn-arduino-lesson-number-1.md)
- [Ladyada's Learn Arduino - Lesson #0](https://learn.adafruit.com/ladyadas-learn-arduino-lesson-number-0.md)
- [Make Beautiful Fritzing Parts with eagle2fritzing](https://learn.adafruit.com/make-beautiful-fritzing-parts-with-eagle2fritzing-brd2svg.md)
- [2.3" Monochrome 128x32 OLED Display Module](https://learn.adafruit.com/2-3-monochrome-128x32-oled-display-module.md)
- [2.7" Monochrome 128x64 OLED Display Module](https://learn.adafruit.com/2-7-monochrome-128x64-oled-display-module.md)
- [Adafruit Music Maker Shield](https://learn.adafruit.com/adafruit-music-maker-shield-vs1053-mp3-wav-wave-ogg-vorbis-player.md)
- [Adafruit Arduino Selection Guide](https://learn.adafruit.com/adafruit-arduino-selection-guide.md)
- [All About Arduino Libraries](https://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use.md)