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LEARN HOME
MICROCONTROLLERS
214 GUIDES | 1575 PAGES | 6 FEATURED | 10 POPULAR
MICROPYTHON CIRCUITPYTHON
NEW
HalloWing Magic 9 Ball
Answer any question with a shake of the Magic 9 Ball!
by John Park
This spooky project uses the HalloWing's built-in accelerometer to detect when you shake the ball, and then calculates the proper answer for any question, which is shown on the HalloWing's TFT display!
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HalloWing Badge Image Viewer
Make your own image player badge with HalloWing and CircuitPython
by John Park
Learn how to display graphics on the HalloWing's TFT screen using CircuitPython. Attach a lanyard for instant personalized conference badge or "HELLO MY NAME IS:" sign! Press the captouch "teeth" to switch images and adjust brightness!
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Circuit Playground Express Head-Tilt Ears
'Ear we go again
by Dave Astels
Use the accelerometer on the Circuit Playground Express to perk up an ear when you tilt your head.
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Hallowing Minotaur Maze
3D(ish) Graphics on a Microcontroller
by Phillip Burgess
Lose yourself in the Labyrinth, smoothly animated in 3D on the Hallowing display, using tricks that might have impressed Daedalus had he stuck around for microcontrollers and bitmapped graphics.
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Milk Jug Glow Skull
You can turn a milk jug into a light diffusing, screaming, inner-lit skull filled with HalloWing-driven NeoPixels
by John Park
Use a heat gun to form a milk jug into a copy of a prop skull that diffuses light beautifully. CircuitPython code creates a candle flickering effect on the internal NeoPixel strip. Two large red LEDs for eyes cap off this creepy look! Creepy yells and growls are sure to spook your visitors.
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Make It Shake, Rattle, and Roll: Accelerometer Use
Use the accelerometer on your Circuit Playground Express to detect movement
by Mike Barela
Tired of your brother/sister/parents going into your room? Or do you want your costume to do something when you move? You can do these and more with an inexpensive accelerometer sensor. Using the one on Circuit Playground Express, we'll show you examples in MakeCode and CircuitPython.
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HalloWing Lightsabers
Create your own motion reactive laser swords with the HalloWing and NeoPixel strip.
by John Park
The HalloWing's onboard accelerometer, amplifier, and NeoPixel support make it easy to build a great-looking light saber that reacts to your movements with light patterns and sounds!
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Hallowing Spirit Board
The not-so-mystifying oracle
by Phillip Burgess
Move around an invisible spirit board that can be seen only through the Hallowing’s display…or touch one of the capacitive pads to have the oracle spell out a message on its own.
FEATURED
HalloWing Light Paintstick
Create bitmapped light paintings with HalloWing or Circuit Playground Express!
by John Park
You can create beautiful light paintings with pixel art magically floating in mid-air using a strip of NeoPixels and the HalloWing or Circuit Playground Express! Start with a bitmap up to 30x100 pixels, and then capture the image with a long exposure photograph!
Circuit Playground Express Perk-up Ears
Servo actuated ears that perk up when there's a loud noise.
by Dave Astels
Build a pair of animated ears that use servos and a Circuit Playground Express to perk up when there's a loud noise. Perfect for around friends, communing with your pet, or to dress up your next cosplay
Adafruit Hallowing
This is Hallowing..this is Hallowing... Hallowing! Hallowing!
by lady ada
Are you the kind of person who doesn't like taking down the skeletons and spiders until after January? Well, we've got the development board for you. This is electronics at its most spooky! The Adafruit HalloWing is a skull-shaped ATSAMD21 board with a ton of extras built in to make for an adorable wearable, badge, development kit, or the engine for your next cosplay or prop.
Circuit Playground Express Automatic Sunglasses
Use one pair of glasses for normal, bright, and dark conditions, controlled by a Circuit Playground Express
by Dave Astels
Take a pair of glasses, some flip up shades, a Circuit Playground Express, and a micro servo. Put them together to make a pair of glasses that automatically flip down the shades and turn into a flashlight depending on how bright the light is around you.
Alternative languages for programming the SAMD51 boards
You can program the new SAMD51 boards in Makecode, C++, and Python. How about Lisp or Forth? Why not?
by Dave Astels
This guide will introduce you to lisp and Forth and how to get them up & running on your SAMD51 based Feather, ItsyBitsy, and Metro boards.
CircuitPython 101: Functions
Exploring functions in CircuitPython
by Dave Astels
You might not have had to write any functions yet. But you've used plenty of them. This guide explores functions in CircuitPython: why you want them, how to make them, and how to get the most out of them.
Zombie Tag Game with Circuit Playground Express
Play infrared zombie tag with Circuit Playground Express and CircuitPython or MakeCode!
by Kattni Rembor
You're a human! Right? For now anyway... There's a red pulsing in the distance... NO! A ZOMBIE! You're losing health, but what's this? A white pulsing from around a corner, a healer! You'll stay human for a little longer... We've written up a fun game for you to play with Circuit Playground Express and CircuitPython or MakeCode. Hopefully you'll be a human long enough to check out this guide!
Adafruit eInk Display Breakouts
Easy E-Paper With Built In Memory
by lady ada
Easy e-paper finally comes to microcontrollers, with this breakout that's designed to make it a breeze to add a tri-color eInk display. Chances are you've seen one of those new-fangled 'e-readers' like the Kindle or Nook. They have gigantic electronic paper 'static' displays - that means the image stays on the display even when power is completely disconnected. The image is also high contrast and very daylight readable. It really does look just like printed paper!
CircuitPython 101: Basic Builtin Data Structures
Tuples, Lists, and Dictionaries! Oh My!
by Dave Astels
CircuitPython (and Python) gives you a lot of tools for storing and manipulating data. Storing that data in ways that makes sense become important when on a small microcontroller board. This guide looks at three data structures that CircuitPython provides.
Paper Craft Zoetrope with Crickit
Make a spinning optical illusion toy with some paper and a motor
by Dano Wall
A Zoetrope is a device for making a short series of images appear animated. This project shows how to build your own simple paper craft zoetrope, generate your own animations, and program it to run using CircuitPython.
Adafruit Feather M4 Express
This Feather is fast like a swift, smart like an owl, strong like a ox-bird
by lady ada
It's what you've been waiting for, the Feather M4 Express featuring ATSAMD51. This Feather is fast like a swift, smart like an owl, strong like a ox-bird (it's half ox, half bird, OK?) This feather is powered by our new favorite chip, the ATSAMD51J19 - with its 120MHz Cortex M4 with floating point support and 512KB Flash and 192KB RAM. 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.
MIT App Inventor and Particle.IO
Use MIT's App Inventor to easily make a killer Android UI that controls your Particle Photon or Electron Project.
by R. Albritton
App Inventor is an easy way to make Apps for the Android platform. We will go through how to use App Inventor for communicating with any Particle device. This is setup to work with the Web Connected LED example app for the Particle Spark, Photon, or Electron.
CircuitPython-Powered 3-minute Nightlight
Make a nightlight with just a Gemma M0 and CircuitPython! Or use a Circuit Playground Express for a super-featured version.
by Dan Halbert
A Gemma M0 running CircuitPython has everything you need to make a simple nightlight or a fancier one with brightness and color control. No assembly required! Put together this simple configurable night-light in only a couple minutes!
Make it Move with Crickit
If your project needs to move, here is the guide to assist you.
by Mike Barela
Getting from the concept of "I want my project to move X to Y" to something which works like your concept can be surprisingly difficult in the past. With the Adafruit Crickit robotics platform, you can understand what motors you want to consider and create working code within minutes.
CircuitPython with Jupyter Notebooks
Interact with CircuitPython Code from within a Jupyter Notebook
by Brent Rubell
Jupyter lets you create interactive notebooks containing code, text, and rich media that you can share with your friends. We're going to learn how to combine Jupyter with CircuitPython to create interactive notebooks for your hardware.
A NeoPixel Pomodoro Timer
Help manage your time and take regular breaks with this Pomodoro Timer project.
by Dave Astels
Pomodoro timer is a technique for keeping focused on your work while also taking regular breaks. This project uses some NeoPixels, a rotary encoder and an ItsyBitsy M0 Express to make one.
FEATURED
CircuitPython on Linux and Raspberry Pi
Make hardware and interface with sensors super easy using CircuitPython
by lady ada
CircuitPython is the best new way to code microcontrollers. But what if you want to run that same code on a more POWERFUL computer like a Raspberry Pi (or really any Linux SBC?) Well now you can - take advantage of the wide collection of drivers and example code we have for CircuitPython and now you can run it right on your Pi!
Contribute to CircuitPython with Git and GitHub
From fork to merge, this guide covers all the steps necessary for a successful Git and GitHub workflow.
by Kattni Rembor
You already have Git setup, and you have a GitHub account. You want to contribute to an open source project like CircuitPython, but you're not sure where to start. This guide walks through the steps from forking your first repo to your GitHub account, to cloning it locally, creating a working branch, making a commit, pushing your code to your fork, creating a PR, and both receiving and giving a review. You'll learn good practices and tips and tricks, and before you know it, you'll be a pro contributor. Pick a project, find an issue, and let's get started!
FEATURED
Crickit Powered Minerva Owl Robot
Eyes that move, wings that flap! Build your own owl robot!
by John Park
Use Circuit Playground Express and Crickit to control your own owl robot that uses a clever, but simple to build construction trick using paper cups for moving eyes! Plus, your owl will be able to speak using a small speaker and some prepared wav files!
Sparky the Blue Smoke Monster Automaton
Talking Sparky guides you when you are wiring things up
by Dano Wall
This project for CRICKIT and Circuit Playground Express teaches basic CircuitPython programming skills and can be adapted into an automaton that performs multiple functions.
Automation with Crickit and Capsela
Use vintage toys as modern fun with Crickit!
by Mike Barela
Capsela was a staple of childhood creativity in the mid-80's-90's. Motorized, you could build many things. Capsela and other toys can take on new lives by controlling their classic motors with modern, inexpensive robotics controllers such as Adafruit Crickit.
Rotary Encoder in CircuitPython
How to use a rotary encoder in your CircuitPython projects!
by Kattni Rembor
Learn how to use a rotary encoder with CircuitPython! Encoders are great when a potentiometer is the wrong fit. You can programmatically make this knob do your bidding.