Adafruit Learning System

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ARDUINO COMPATIBLES

ADAFRUIT METRO

20 GUIDES | 346 PAGES | 0 FEATURED | 2 POPULAR

Neon LED Signs

Make your own neon-style signs with LED "neon" strips. Animate the sign with a Metro M0

Use MakeCode or CircuitPython to code the animation of multiple "neon tubes" connected to the Metro M0 and an 8-channel Darlington driver. Mount it into an enclosure with buttons to turn the sign on and off and to start and stop the blinking!

Digital Circuits 7: MCUs... how do they work?

Inside the ATMega328: a guided tour of a classic Microcontroller

We look at the ATMega328, one of the most prolific 8-bit MCUs. The '328 can be found in the Arduino UNO and various other microcontroller boards. To better understand MCUs, and be able to work with them more effectively, we need to go inside and understand what's in there and how it all works.

Debugging CircuitPython On SAMD w/Atmel Studio 7

Un-Constricted CircuitPython Debugging in a Windows Environment!

by M. Schroeder

This guide will help you to start debugging CircuitPython on the SAMD21 or SAMD51, using Windows and Atmel Studio 7. Take the squeeze off virtual environments and do some work in your native operating system!

Digital Circuits 6: An EPROM Emulator

In this guide, we design and build a ROM emulator

Building a retro micro project can be fun, but using old ultraviolet EPROMS is difficult. But, you can build a ROM emulator. In this guide, we'll walk through the design and implementation using a Metro M4, a static RAM chip, and a handful of digital logic chips.

Adafruit Metro M4 Express featuring ATSAMD51

Choo! Choo! ARM Cortex M4 @ 120 MHz coming thru!

Are you ready? Really ready? Cause here comes the fastest, most powerful Metro ever. The Adafruit Metro M4 featuring the Microchip ATSAMD51. This Metro is like a bullet train, with it's 120MHz Cortex M4 with floating point support. Your code will zig and zag and zoom, and with a bunch of extra peripherals for support, this will for sure be your favorite new chipset.

Mystery Box: NeoMatrix Mk I

Interface of Infinite Possibilities: Matrix keypad and NeoSegment display

A phone pad button matrix combines with an RGB character display to build a general purpose UI box with lights, sounds, and knobs! Use it for puzzles, data entry, encryption, machine control, games, and more!

Programming an M0 using an Arduino

computers are overrated anyhow

Programming ARM core microcontrollers can be bulky and time consuming. This guide hows how to do it simply using an ATSAMD21 based arduino-compatible board.

Experimenter's Guide for Metro

Harness the power of the Adafruit Metro by making 18 Circuits!

by Brent Rubell

We are going to make 18 circuits to explore the basics of using wiring and programming with the Adafruit Metro and Metro Express in Arduino. This guide covers: LEDs, transistors, motors, integrated circuits, push-buttons, variable resistors, photo resistors, temperature sensors & relays.

Adafruit Metro Mini

Slim all-in-one Metro that's breadboard friendly

We sure love the ATmega328 here at Adafruit, and we use them a lot for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. METRO Mini is the culmination of years of playing with AVRs: we wanted to make a tiny, breadboard-friendly development board that is easy to use and is hacker friendly. Metro Mini can be programmed with the Arduino IDE (select 'UNO' in the boards dropdown)

Metro Minimalist Clock

What time is it? Metro Mini time! Build this stylish, minimalist clock.

It's a clock. Made of love. And a Metro mini, a realtime clock module, and a 7-segment display backpack.

Circuit Playground Express (& other ATSAMD21 Boards) DAC Hacks

Revisiting the Olde Days of television and radio

by Phillip Burgess

The Circuit Playground Express runs on the ATSAMD21 which has a built-in DAC (digital-to-analog converter). It can be persuaded to generate black-and-white TV signals or transmit weak AM radio — without soldering any extra components!

Adafruit Metro M0 Express - Designed for CircuitPython

CircuitPython, Arduino IDE or even MakeCode with this Metro M0

Metro is our series of microcontroller boards for use with the Arduino IDE. This new Metro board looks a whole lot like our original Metro 328, but with a huge upgrade. Instead of the ATmega328, this Metro features a ATSAMD21G18 chip, an ARM Cortex M0+. It's our first Metro that is designed for use with CircuitPython! CircuitPython is our beginner-oriented flavor of MicroPython - and as the name hints at, its a small but full-featured version of the popular Python programming language specifically for use with circuitry and electronics.

Debugging the SAMD21 with GDB

Using GDB to better understand program state and history.

by Scott Shawcroft

Debug your SAMD21 C code via the GNU Project Debugger (GDB) on Windows, Mac or Linux. Breakpoints allow you to pause your code at points of interest. Once paused, use a backtrace to see the current program state and the micro trace buffer to see the history of the program.

Ladyada's Learn Arduino - Lesson #2

Venture deep into the Blink sketch...

OK you've gotten your Arduino set up and also figured out how to use the software to send sketches to the board. Powerful stuff! But...just running example sketches is a little boring. What we really want to do is use our own creativity and skill to write new sketches! That's what we'll be doing in this lesson. To start we will venture deep into the Blink sketch, looking at each line and trying to understand what its doing. Then we will start hacking the sketch, and maybe even meet an internationally-famous DJ and design custom hardware for him!

Ladyada's Learn Arduino - Lesson #1

Hello, World! I am an Arduino and I am here to BLINK!

Ah yes, it is finally time to make your Arduino do something! We're going to start with the classic hello world! of electronics, a blinking light. OK it doesn't sound too exciting, heck you can just flip your desk lamp on and off without needing a microcontroller.. but I promise you, you'll learn a lot!

Ladyada's Learn Arduino - Lesson #0

If you're here, it's because you want to learn how to build and make stuff with electronics! And, you're in luck: there's never been a better time.

Make Beautiful Fritzing Parts with eagle2fritzing

From EagleCAD -> XML -> SVG -> FPZ

Fritzing is an open source CAD-like graphical software for all operating systems that allows full interaction between breadboard, schematic and PCB views. Customers or other enthusiasts can wire up breadboard diagrams and then turn that into a schematic and even a finished PCB! Wouldn't it be cool if you could generate 1:1 perfect Fritzing objects right from a board file?

2.3" Monochrome 128x32 OLED Display Module

Lovely large OLED pixels

If you've been diggin' our monochome OLEDs but need something bigger, this display will delight you. These displays are 2.3" diagonal, and very readable due to the high contrast of an OLED display. If you've been diggin' our monochome OLEDs but need something bigger, this display will delight you. These displays are 2.7" diagonal, and very readable due to the high contrast of an OLED display. This display is made of 128x32 individual white OLED pixels, each one is turned on or off by the controller chip.

2.7" Monochrome 128x64 OLED Display Module

Lovely large OLED pixels

If you've been diggin' our monochome OLEDs but need something bigger, this display will delight you. These displays are large and very readable due to the high contrast of an OLED display. This display is made of 128x64 individual white OLED pixels, each one is turned on or off by the controller chip.

Adafruit Arduino Selection Guide

Which Arduino is Right for Me?

This guide explains the differences between the various types of Arduinos and Arduino compatible microcontrollers and helps you to select the one that best fits your needs.