The Specs:

• Support for the Arduino IDE 1.0+ (OSX/Win/Linux)
• Power via USB or External Source - 5v or 7-35v (automatic selection)
• On-board 500ma 5V Regulator
• Built-in USB (and serial debugging)
• 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB)
• 8k Flash Memory (about 6k after bootloader)
• I2C and SPI (vis USI)
• PWM on 3 pins (more possible with Software PWM)
• ADC on 4 pins
• Power LED and Test/Status LED (on Pin0)

Just how small is it? Well it's about the size of a quarter. While the small size made hand soldering prototypes difficult, we find that it is the perfect size to stick in even our smallest projects, but not too small to comfortably handle. Since it uses standard 0.1 in spaced headers it is easy to hookup to anything.

Click here for detailed dimensions.

USB On-Board: With the on board USB connector it is also easy to program by wither directly plugging it into the computer or, if it is installed in a project, with a super cheap and common USB extension cable. In addition, it is small enough to be left plugged in your computer, use it to run a computer controlled RGB status LED, read a directly solder sensor, or fool your friends by programming it to be a USB keyboard and turn their caps lock on and off randomly, the possibilities are endless!

For development and production: One of our main goals it to ensure that the Digispark is both small and cheap enough to be used not only for development but also production. Why leave your valuable full sized Arduino in a project when all you need is a few pins, an ADC, PWM, or an SPI bus! The Digispark is cheap enough to leave in all your projects or even use in small run production! Once this Kickstarter campaign is over, we'll continue ensure the Digisparks are readily available for sale both directly through us as well as through other online retailers!