Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.
Arduino can sense the environment by receiving input from a variety of sensors and can affect its surroundings by controlling lights, motors, and other actuators. The microcontroller on the board is programmed using the Arduino programming language (based on Wiring) and the Arduino development environment (based on Processing). Arduino projects can be stand-alone or they can communicate with software on running on a computer (e.g. Flash, Processing, MaxMSP).
The boards can be built by hand or purchased preassembled; the software can be downloaded for free. The hardware reference designs (CAD files) are available under an open-source license, you are free to adapt them to your needs.
Arduino received an Honorary Mention in the Digital Communities section of the 2006 Ars Electronica Prix. The Arduino team is: Massimo Banzi, David Cuartielles, Tom Igoe, Gianluca Martino, and David Mellis. Credits
To get started, follow the instructions for your operating system: Windows, Mac OS X or Linux; or for your board: Arduino Nano, Arduino Mini, Arduino BT, LilyPad Arduino, XBee shield. If you're having trouble, check out the troubleshooting suggestions.
Examples of how to work with the Arduino language and common electronic components; further readings on the foundations; information on hacking and extending the Arduino hardware and software; external resources.
Reference for the Arduino language (see also the extended version); a collection of libraries for working with various types of hardware; a comparison with other prototyping platforms, and information about the components of the Arduino board.
Information about the Arduino hardware, including reference designs (EAGLE files).
General announcements and thoughts from the Arduino team can be found in our blog.
The multi-lingual forum is the place to go with questions of all kinds.
We're collecting Arduino knowledge, tutorials, and instructions in the playground wiki.