The Arduino Pro 328 - 5V/16Mhz microcontroller board is a minimal version of the Arduino by SparkFun designed for the experienced user who wants control over how connections are made to the board and a low cost. The Arduino Pro uses the same ATMega chip as the Arduino Uno 328 USB Board.
This is the current Arduino Pro sku: DEV-10915 from Sparkfun
It's blue! It's skinny! It's the Arduino Pro! SparkFun's minimal design approach to Arduino. This is a 5V Arduino running the 16MHz bootloader in a super-sleek form factor that will fit easily into your next small project.
This board connects directly to the FTDI Basic Breakout board and supports auto-reset. The Arduino Pro also works with the FTDI cable but the FTDI cable does not bring out the DTR pin so the auto-reset feature will not work. In this latest version of the Arduino Pro we've also moved the FTDI headers back just a skoach so that the pins don't hang over the edge of the board. SparkFun also populated it with a sturdier power selection switch.
Note: A portion of this sale is given back to Arduino LLC to help fund continued development of new tools and new IDE features.
Dimensions: 2.1x2.05" (53.34x52.08mm)