Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the
Processing
/
Wiring
language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The open-source IDE can be
downloaded
for free (currently for Mac OS X, Windows, and Linux).

This is the new, smaller, Arduino Mini 05 with ATmega328. The latest version of this board is built around a smaller ATmega328 package, allowing all of the parts to be populated on the top side of the board. Of course, it still requires an external serial connection for programming.
The Arduino Mini 05 is a great development module for building compact devices that need to interact with the world around them.
Not sure which Arduino or Arduino-compatible board is right for you? Check out our Arduino Buying Guide!

Note:A portion of this sale is given back to Arduino LLC to help fund continued development of new tools and new IDE features.

• Microcontroller ATmega328
  
• Operating Voltage 5V
  
• Input Voltage 7-9 V
  
• Digital I/O Pins 14 (of which 6 provide PWM output)
• Analog Input Pins 8 (of which 4 are broken out onto pins)
  
• DC Current per I/O Pin 40 mA
  
• Flash Memory 32 KB (of which 2 KB used by bootloader)
  
• SRAM 2 KB
  
• EEPROM 1 KB
  
• Clock Speed 16 MHz