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I2C addresses!
I2C addresses from 0x00 to 0x7F (inclusive)
by lady ada
I2C is incredibly popular because it uses only 2 wires, and like we said, multiple devices can share those wires, making it a great way to connect tons of sensors, drivers, expanders, without using all the microcontroller pins. The only bad news about I2C is that each I2C device must have a unique address - and the addresses only range from 0 to 127 (aka 0 to 0x7F hex). Since we deal with so many I2C devices we thought it would be handy to have a table with all the most common sensors and modules we encounter, and their I2C address!
Programming SPI flash with an FT232H breakout
they're a dime a dozen. Lets use them!
by Dean Miller
Use an Adafruit FT232H and one command to program your favorite flash programmable chips.
Level Shifting 3.3V microcontrollers and NeoPixels
Level shifters are like little bilingual translators for your electronics!
by John Park
NeoPixels rule! But, they expect 5V logic, which can cause them to act funny when controlled by 3v3 boards, such as Feathers, M0-based Arduinos, Teensy 3, and others. Not to worry! A level shifter can translate 3v3 logic to 5V and get things talking again in no time!
Breadboards for Beginners
Diagrams, tips and tricks to take you from beginner to brilliant
by lady ada
When you start on your electronics journey, you will eventually need to wire up some parts to follow along with some project. And, chances are, you will be prodded towards using a breadboard. These ubiquitous pale slabs of plastic are everywhere when it comes to electronics hacking.
Vibro-bugz
Making Small and Simple
by Rick Winscot
Use 3D printing, a motor, battery, and some googly eyes to teach basic maker skills.
Fair Weather Friend: Internet-Connected Migraine or Allergies Detector
"Web scraping" provides an alternative to restrictive programming APIs
by Phillip Burgess
Using forecasts by AccuWeather.com, this wireless ambient display predicts health issues like allergies or arthritis, or good days ahead for leisure activities like golf or sailing.
Adafruit DS3231 Precision RTC Breakout
Repent and temperature-compensate your oscillator, said the tick-tock man!
by lady ada
The datasheet for the DS3231 explains that this part is an "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal". And, hey, it does exactly what it says on the tin! This Real Time Clock (RTC) is the most precise you can get in a small, low power package.
Geofencing with the FONA 808 & Adafruit IO
Build a geofencing project that will send alerts when it goes out of the perimeter!
by M. Schwartz
In this project, you will learn how to build a geofencing project, that you will be able to track online.
Qi Wireless Recharging Battery Case
Add wireless charging to your phones' battery case!
by Rick Winscot
Thinking about using a battery case for your phone, but don't want to give-up wireless charging? Have no fear, Qi is here! Now you can have a 'battery storage' case that can recharge itself without need of wires.
Remote controlled door lock using a fingerprint sensor & Adafruit IO
Open a door lock from anywhere by simply using your fingerprint!
by M. Schwartz
In this project, you will learn how to control a door lock remotely, simply by using your fingerprint. Because we'll be using Adafruit IO, the fingerprint sensor & the lock can be in completely different places.
Mini Pan-Tilt Kit Assembly
What to do with that bag of parts.
by Bill Earl
This step-by-step guide to assembling the Mini Pan-Tilt kit will have you panning and tilting in just a few short minutes.
Home Automation in the Cloud with the ESP8266 & Adafruit IO
Build a simple home automation system & control it from anywhere!
by M. Schwartz
In this guide, we are going to build two modules based on the ESP8266: a sensor module, and a lamp controller module. We will then use Adafruit IO to control these modules from anywhere.
Print Your Own Circuit Boards
Begin printing your own circuit boards now!
by Adam Kohring
This guide will teach you how to turn your board design into a printed circuit board.
Portable Apple Watch Charger
Hack your existing charger and build your own portable charger
by Ruiz Brothers
Here’s how to build a wireless charger for the Apple Watch.
Piezo Ring Tones with Raspberry Pi
Play ringtones with a piezo buzzer on Raspberry Pi.
by Roberto Marquez
The Raspberry Pi's GPIO pins are used to play RTTTL sequences on a piezo buzzer. It is Web enabled and Java-powered. The Web app has built in RTTTL tones, as well as input controls for playing user provided RTTTL tones.
XBee Radios
Simple wireless communication
by lady ada
XBee modems are one of the easiest ways to create a wireless point-to-point or mesh network. They have error correction, are configured with AT commands, come in multiple flavors and can create a wireless serial link out of the box! I wanted to make a wireless Arduino project but all the adapter boards on the market made me unhappy. So I designed what I think is an excellent low-cost adapter board.
Ringly Teardown
Inside the Bluetooth notification ring
by Becky Stern
Wear your notifications on your fingers and learn what makes this smart cocktail ring tick!
Wires and Connections
How to choose your next projects connections
by Mike Barela
Thousands of different wire types and hundreds of different connectors to terminate the ends. Here we discuss the more popular types you might use in your projects.
Adafruit DRV2605 Haptic Controller Breakout
BzzzzzBBzzzzzBzZZZzz
by lady ada
The DRV2605 is a tiny motor controller that is specifically designed for vibration-disc and other haptic feedback motors. Using I2C you can string multiple built-in vibration effects for high quality tactile feedback.
Han Solo Blaster Cosplay
Complete your Star Wars Outfit
by Mike Barela
Han's outfit is an easy one to assemble. Just one accessory makes the outfit, the trusty blaster. An easy-to-buy toy model is fairly accurate design-wise but could use some simple improvements.
PiPhone - A Raspberry Pi based Cellphone
Why have a cellphone that everyone else has, when you can build your own?
by David Hunt
This project takes you through building a functional cellphone using off-the-shelf parts,
Using NeoPixels and Servos Together
An introduction to AVR peripherals.
by Phillip Burgess
Conventional wisdom holds that you can't use NeoPixels and servos together in the same Arduino sketch. Learning to directly control the AVR microcontroller's hardware peripherals (or just using our ready-made library) makes this combination possible…with some catches.
Trinket “Question Block” Sound Jewelry
Jump around, jump up and get down!
by Phillip Burgess
“Ba-DING!” The classic 8-bit chime from our favorite retro video game finally makes a triumphant comeback in jewelry form. It’s so tiny and adorable you're probably wondering, “How much?” This is custom…you can only make it, not buy it!
Adafruit FT232H Breakout
Add a serial protocol 'swiss army knife' to your computer and talk directly to devices with SPI, I2C, serial UART, GPIO's, and more!
by Tony DiCola
Using the FTDI FT232H chip this breakout provides a USB to serial UART with a special 'Multi-Protocol Synchronous Serial Engine' (MPSSE) that can talk many serial protocols such as SPI, I2C, serial UART, JTAG, and more!
MASLOW: an Open WiFi Detector with Adafruit Pro Trinket and CC3000
Mini Adafruit System Locates Open Wireless
by Phillip Burgess
Traveling or on the road, sometimes finding an open network to get online and finish a job is more important than lunch or a nap. MASLOW (Mini Adafruit System Locates Open Wireless) is a tiny battery-powered WiFi detector with a 3D-printed enclosure…assemble one yourself and clip it to your laptop bag.