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LEARN HOME
ARDUINO COMPATIBLES
230 GUIDES | 1760 PAGES | 0 FEATURED | 56 POPULAR
ADAFRUIT FLORA ADAFRUIT GEMMA ADAFRUIT METRO LEARN ARDUINO
Dotstar LED and Glass Pebble Floor
Add dramatic color changing lighting to your walkway
by Erin St Blaine
Put a stunning light installation in your floor or walkway. Control it with a click of Circuit Playground's onboard buttons. Glass pebbles create a classy diffused look that will accent any home beautifully.
GEMMA M0 Case
3D Print A Case For Your GEMMA M0
by Ruiz Brothers
Need an enclosure for your shiny new GEMMA M0? 3D print one!
Adafruit Metro Mini
Slim all-in-one Metro that's breadboard friendly
by lady ada
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)
Gemma M0 Sheikah Pendant
Wearable Glowing Jewelry
by Ruiz Brothers
3D print a Sheikah themed pendant from the Legend of Zelda using a NeoPixel Jewel and Gemma M0.
Pinball Controller for iPad
Make a pinball controller for your iOS device using Teensy
by John Park
Virtual pinball is incredibly fun, but even more so with real, physical flipper buttons and a plunger. Use a Teensy in HID keyboard mode to send iCade-compatible commands to your iOS device over the Lightning connector.
Adafruit Gemma M0
The Gemma M0 will super-charge your wearables! Small, light, and it's easy to use, so you can do more.
by lady ada
The Adafruit Gemma M0 may look small and cute: round, about the size of a quarter, with friendly alligator-clip sew pads. But do not be fooled! The Gemma M0 is incredibly powerful! We've taken the same form factor we used for the original ATtiny85-based Gemma and gave it a power up. The Gemma M0 has swapped out the lightweight ATtiny85 for a ATSAMD21E18 powerhouse.
Metro Minimalist Clock
What time is it? Metro Mini time! Build this stylish, minimalist clock.
by John Park
It's a clock. Made of love. And a Metro mini, a realtime clock module, and a 7-segment display backpack.
Adafruit Mini TFT - 0.96" 160x80
Mini TFT is small, but don't let it's size fool you!
by lady ada
It's the size of your thumbnail, with glorious 160x80 pixel color... it's the Adafruit Mini TFT Breakout! This very very small display is only 0.96" diagonal, packed with RGB pixels, for making very small high-density displays.
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!
Neopixel Jewel 10 Minute Necklace
Create a stunning piece of jewelry with this easy project.
by Erin St Blaine
Use a Gemma and a Neopixel Jewel to create a stunning necklace. The parts in this project cost less than $25, and it's simple and easy to do: great for beginners, kids, or as a simple insert to make any jewelry craft light up. Build it in 10 minutes and it will glow all night long.
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Introducing Adafruit Feather
Boards of a Feather flock together!
by lady ada
Welcome to the Wonderful World of Feathers! This guide will tell you all about the dozens of options you have to build your next Feather project.
Adafruit Metro M0 Express - Designed for CircuitPython
CircuitPython, Arduino IDE or even MakeCode with this Metro M0
by lady ada
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.
Coffee Detonator: The TNT Plunger Grinder
Use a high-voltage AC power source to trigger a Feather microcontroller-driven coffee grinder.
by John Park
This guide will show you how a magneto, generator, or other AC power source can be safely converted into a small DC signal easily read by an Arduino-compatible microcontroller. Then, the microcontroller can trigger a 120V relay to turn on any appliance!
CurieBot: Arduino 101 Mini Robot Rover
The powerful, 32-bit, Bluetooth enabled, three-layer robot of the future!
by John Park
Build your own mini robot with the Arduino 101 board. This smart little 'bot contains a 32-bit Intel Curie module, Bluetooth LE capabilities, and a 6-axis accelerometer/gyro! Drive it with your phone, or turn over the controls to this capable robot's own decision making!!
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Adafruit Feather M0 Express - Designed for CircuitPython
Get running faster than ever with the first Adafruit Express board
by lady ada
Get started quickly using Arduino or CircuitPython on the Feather M0 Express.
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Ninja Timer: Giant 7-Segment Display
Build a huge timer for an event or race. It's a digital segment display made from RGB NeoPixels!
by John Park
Laser-cut acrylic is layered to create large, sharp, segments that are backlit by NeoPixel strips, and controlled with an Arduino. Huge buttons for start and stop are wired in over CAT5 network cable.
Using Bluefruit BLE to Give Disabled Users Switch Control Access to IOS Devices
Build an inexpensive Bluetooth device to give a disable user access to their iPad or iPhone
by Chris Young
A physical disability can make it impossible to operate a touchscreen device such as an iPhone or iPad. Commercially available switch control devices can cost several hundred dollars but with the power of Adafruit Bluefruit BLE devices you can build an interface for a fraction of that cost. We show you how in this tutorial.
Glowing WhoVille Hat
Be the brightest Who in Whoville
by Erin St Blaine
This twinkling hat made with Fosshape and Flora will make you the life of the party this holiday season.
NeoAnim: Using Bitmaps to Animate NeoPixels on Circuit Playground
Use this Python script to enable artist-friendly NeoPixel animation on Circuit Playground
by John Park
Animating NeoPixels can be challenging when using purely coding methods. This technique allows you to create traditional animation-style exposure sheets to control the color, position, and timing of your NeoPixel animation on the Circuit Playground.
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.
Adabox 001
Explore the contents of your ADABOX 001
by lady ada
If you're here, it's because you were given the gift of electronics with an AdaBox! You are a beginner who is getting started with your AdaBox or you just want to relive what it's like being a beginner at electronics again. But most of all, you want to learn how to build and make stuff with electronics!
Ladyada's Learn Arduino - Lesson #2
Venture deep into the Blink sketch...
by lady ada
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!
by lady ada
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!
Circuit Playground Password Vault
Turn your Circuit Playground into a USB password vault
by John Park
Long, random passwords are the most secure, but can be difficult to remember and tricky to type. Build this Circuit Playground Password Vault to remember and enter them for you! Store up to ten passwords and enter them into a computer over USB at the push of a button. You'll even create a unique unlock sequence so your passwords stay secure, and build a rugged 3D printed case to take it on the go.
Circuit Playground & Bluetooth Low Energy
Interact with Circuit Playground from your phone or tablet without wires!
by Tony DiCola
Learn how to connect a Bluefruit LE module to Circuit Playground and interact with the device using Adafruit's Bluefruit iOS and Android applications.
Mindfulness Clock OF DOOM
A grim reminder that time is priceless
by Phillip Burgess
It’s not pleasant thinking about one’s mortality, but that’s the point of this project: to make one aware of the passage of time and how precious each minute is. As you look at the clock, remember that you are never getting those minutes back. Stop watching internet cat videos and make the most of them!
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Ladyada's Learn Arduino - Lesson #0
Hi There!
by lady ada
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
by lady ada
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?
Using Board Package Tool to Update Adafruit Arduino Packages
How to use the Python board package tool (bpt) to keep Adafruit's Arduino packages up to date.
by Tony DiCola
Learn how to use Python scripts that can automate keeping Adafruit's Arduino package repositories up to date with the Arduino board package index.
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Compiling ATSAMD21 Bootloader
compile your own atsamd21 bootloader
by lady ada
This isn't an in-depth tutorial, just some notes I took since I was asked a few times how to modify/compile the bossac bootloader for the ATSAMD21