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Arduino Lesson 1. Blink
Learn Arduino! Lesson 1. Blink
This is Lesson 1 in the Learn Arduino from Adafruit series. In this lesson, you will learn how to program your Arduino to make the Arduino's built-in LED blink.
Tiny Arduino Music Visualizer
Maximum blinkenlights, minimum effort!
This easy project combines an Arduino with our microphone amplifier and bicolor LED matrix to create a music visualizer that responds to ambient sound.
RGB LED Strips
Glowy goodness!
We love some good LED blinking as much as the next person but after years of LED-soldering we need something cooler to get us excited. Sure there are RGB LEDs and those are fun too but what comes after that? Well, we have the answer: LED Strips! These are flexible circuit boards with full color LEDs soldered on. They take a lot of LED-wiring-drudgery out of decorating a room, car, bicycle, costume, etc. Here is a quick tutorial on how to get an LED strip working with an Arduino.
Adafruit 16x2 Character LCD + Keypad for Raspberry Pi
This new Adafruit Pi Plate makes it easy to use an 16x2 Character LCD with a Keypad
This new Adafruit Pi Plate makes it easy to use an RGB 16x2 Character LCD. We really like the RGB Character LCDs we stock in the shop. Unfortunately, these LCDs do require quite a few digital pins, 6 to control the LCD and then another 3 to control the RGB backlight for a total of 9 pins. With this in mind, we wanted to make it easier for people to get these LCD into their projects so we devised a Pi plate that lets you control a 16x2 Character LCD, up to 3 backlight pins AND 5 keypad pins using only the two I2C pins on the R-Pi!
Furby 2012 Teardown
What's inside this hot toy?
There are a lot of fun sensors and interesting mechanics inside the new 2012 Furby, so we thought we'd take it apart and look inside.
How to Make a Pogo Pin Test Jig
Get jiggy!
If you end up buying a pick and place to assemble PCBs (or even if you're doing it by hand) you'll need to test out your boards! If you have an assembler do it for you, its still probably a good idea to have a jig you can give them. A good jig will tell you whats going right and whats going wrong. In this tutorial I will show how I designed a very basic jig with a "tested good" audible indicator. The board its testing is very simple but the basic premise can be expanded to large projects with ease.
Flora RGB Smart Neo Pixels
Addressable, chainable, delectable!
Add multicolored LEDs to your wearables project with these easy-to-use chainable RGB pixels.
Getting Started with FLORA
Adafruit's Wearables Platform
Dig into wearable electronics with FLORA! Follow this guide first to get up and running.
Flora Wearable GPS
Our Ultimate GPS-- for wearable electronics!
Add a GPS location data to your wearable project with this locative member of the Adafruit Flora series.
Adafruit Analog Accelerometer Breakouts
ADXL335 and ADXL326 Accelerometer Quickstart
The ADXL335 and ADXL326 are low-power, 3-axis MEMS accelerometer modules with ratiometric analog voltage outputs. The Adafruit Breakout boards for these modules feature on-board 3.3v voltage regulation which makes them simple to interface with 5v microcontrollers such as the Arduino.
Adafruit Optical Fingerprint Sensor
All-in-one fingerprint sensors make ID easy
Secure your project with biometrics - this all-in-one optical fingerprint sensor will make adding fingerprint detection and verification super simple. These modules are typically used in safes - there's a high powered DSP chip that does the image rendering, calculation, feature-finding and searching. Connect to any microcontroller or system with TTL serial, and send packets of data to take photos, detect prints, hash and search.
MCP230xx GPIO Expander on the Raspberry Pi
Add 8 or 16 extra GPIO pins to your pia via I2C
Using the MCP230xx GPIO expanders on the Raspberry Pi to add 8 or 16 additional GPIO ports to your board.
Adafruit INA219 Current Sensor Breakout
Measure high side voltage and DC current draw over I2C
The INA219B breakout board will solve all your power-monitoring problems. Instead of struggling with two multimeters, you can use this breakout to measure both the high side voltage and DC current draw over I2C with 1% precision.
Pi Video Output Using pygame
Add a video display to your Pi!
How to use pygame to generate graphics using the composite or HDMI video output on your Raspberry Pi
Adafruit16-Channel Servo Driver with Arduino
Learn how to connect and program the 16-channel 12-bit PWM/Servo Driver
Animating Multiple LED Backpacks
Lights! Action! MORE LIGHTS! MORE ACTION!
Adafruit LED backpacks make it incredibly simple to add small bitmapped displays to a project. Each requires just four wires: power, ground and two communication lines to a microcontroller. Here’s how to use more than one 8x8 matrix backpack in an Arduino sketch.
Wave Shield Voice Changer
Speak like everyone's favorite baritone Sith lord or sing along with the Lollipop Guild!
Like a fine wine, open source projects improve with age. We've taught this classic shield a new trick: a realtime voice changer!
Arduino "Hunt The Wumpus"
Play Hunt the Wumpus on an Arduino
Use Adafruit's RGB LCD shield and an Arduino to revisit the early days of computer gaming. You too can hunt the Wumpus or, perhaps, be eaten by the Wumpus.
Creating Accurate Footprints in Eagle
A guide to making footprints in Eagle that accurately reflect the mechanical outline of your parts
Solderless RGB LED Clips
Hook up RGB LED strip easily and without soldering! These clips make it super simple to affix two strips together, either with an extension or a coupler, and third option allows easy connection to a power supply and controller.
Adafruit Guide To Excellent Soldering
Solder at peak performance!
A lovely illustrated guide to soldering and identifying & solving common soldering problems
MCP4725 12-Bit DAC Tutorial
Add an analog output to your microcontroller
Your microcontroller probably has an ADC (analog -> digital converter) but does it have a DAC (digital -> analog converter)??? Now it can! This breakout board features the easy-to-use MCP4725 12-bit DAC. Control it via I2C and send it the value you want it to output, and the VOUT pin will have it. Great for audio / analog projects, such as when you can't use PWM but need a sine wave or adjustable bias point.
Mini Thermal Receipt Printer
Print receipt paper from a little printer
Add a mini printer to any microcontroller project with this very cute thermal printer. Also known as receipt printers, they’re what you get when you go to the ATM or grocery store. Print text, barcodes, bitmap graphics, even a QR code!
Adding a Real Time Clock to Raspberry Pi
Keep time at all times with a real time clock
To keep costs low, the Raspberry Pi does not include a Real Time Clock module. Instead, users are expected to have it always connected to WiFi or Ethernet and keep time by checking the network. Since we want to include an external module, we'll have to wire one up. We'll go with the easy-to-use and low-cost DS1307.
2.2" TFT Display
220x176 pixels in 18 bit color with a microSD breakout
This lovely little display breakout is the best way to add a small, colorful and bright display to any project. Since the display uses 3-wire SPI to communicate and has its own pixel-addressable frame buffer, it can be used with every kind of microcontroller. Even a very small one with low memory and few pins available!
Plush Game Controller
Capacitive touch sensing with conductive fabric & Flora
Build a classic game controller with Flora! The microcontroller's native USB support allows it to act like a keyboard, and conductive fabric makes great capacitive touch sensors-- add them up for a oversize plush toy controller that actually works!
TIMESQUARE Watch Kit
Show up stylish AND on time to any event with this awesome looking DIY watch.
Show up stylish AND on time to any event with this awesome looking DIY watch. Build your own fashionable time piece, with multiple watch 'faces' and a bright 8x8 matrix display
USB NeXT Keyboard with an Arduino Micro
Get out your 10 lb keyboards!
Ladyada and pt had an old NeXT keyboard with a strong desire to get it running on a modern computer. These keyboards are durable, super clicky, and very satisfying to use! We spent a few days and with a little research we got it working perfectly using an Arduino Micro as the go between. Now this lovely black deck works like any other USB keyboard. Sure it weighs more than our Macbook, but its worth it!
Adafruit Ultimate GPS
One GPS to rule them all and in the darkness find them!
We carry a few different GPS modules here in the Adafruit shop, but none that satisfied our every desire - that's why we designed this little GPS breakout board. We believe this is the Ultimate GPS module, so we named it that. It's got everything you want and more. This guide will teach you how to wire it up to a computer or an Arduino, and how to use it.
Cross Stitch
Stitches are like pixels
So you want to learn cross stitch! Cross stitch is the process of turning a grid of pixels into a stitched masterpiece with tiny Xs in colored floss.
LED Bicycle Handlebars
Super bright onboard lights
Add a strip of LEDs to your bicycle handlebars for extra visibility and fun at night. This easy project requires only a few parts and very little soldering.

About Adafruit

Adafruit was founded in 2005 by MIT engineer, Limor "Ladyada" Fried. Her goal was to create the best place online for learning electronics and making the best designed products for makers of all ages and skill levels.
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The Adafruit Learning System

In 2012, after years of coding tutorials by hand, Limor put together a small team to build a custom tutorial management system from the ground up. The Adafruit Learning System allows us to make a wide range of awesome tutorials fast and efficiently. We hope these tutorials will help you learn something new, and inspire you to make something great!

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