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Adafruit Color Sensors
Measure Light and Color with Adafruit TCS34725 Color Sensors
Your electronics can now see in dazzling color with this lovely color light sensor. We found the best color sensor on the market, the TCS34725, which has RGB and Clear light sensing elements. An IR blocking filter, integrated on-chip and localized to the color sensing photodiodes, minimizes the IR spectral component of the incoming light and allows color measurements to be made accurately.
Light Meter
Measure and display light levels.
Build a light meter using an I2C level converter, LCD, and TSL2561.
Photocells
CdS Cells, Photoresistors, & Light Dependent Resistors (LDR)
Photocells are sensors that allow you to detect light. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason they often appear in toys, gadgets and appliances. This guide will show you how they work, how to wire them, and give you some project ideas.
IR Sensor
Make remote controls and listeners
IR detectors are little microchips with a photocell that are tuned to listen to infrared light. They are almost always used for remote control detection - every TV and DVD player has one of these in the front to listen for the IR signal from the clicker. In this guide we will explain how IR sensors work, how to pull IR codes out of a remote control, and show you how to wire them up to a microcontroller.
TSL2561 Luminosity Sensor
Low power, digital luminosity (light) sensor
The TSL2561 luminosity sensor is an advanced digital light sensor, ideal for use in a wide range of light situations. Compared to low cost CdS cells, this sensor is more precise, allowing for exact lux calculations and can be configured for different gain/timing ranges to detect light ranges from up to 0.1 - 40,000+ Lux on the fly. This guide will show you how this sensor works, and how to use it with your favorite microcontroller.
FLORA TV-B-Gone
A tiny television neutralizer
The most wearable TV-B-Gone yet! Use freehand wiring with solder to whip up this pin capable of shutting off most television sets. Craft your own fabric ornament to match any outfit.
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!
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
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.
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!
Light Painting with Raspberry Pi
Awesome photographic effects!
Light painting — a technique mixing photography with electronics — becomes astoundingly simple when Raspberry Pi is involved.

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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