SparkFun Arduino Pro Mini 328 3.3V/8Mhz

It's blue! It's thin (0.8mm / 2.8mm with components)! It's the Arduino
Pro Mini! SparkFun's minimal design approach to Arduino. This is a 5V
Arduino running the 16MHz bootloader (select 'Arduino Duemilanove w/
328' within the Arduino software). Arduino Pro Mini does not come with
connectors populated so that you can solder in any connector or wire
with any orientation you need. We recommend first time Arduino users
start with the Uno R3. It's a great board that will get you up and
running quickly. The Arduino Pro series is meant for users that
understand the limitations of system voltage (3.3V), lack of
connectors, and USB off board.

We really wanted to minimize the cost of an Arduino. The Arduino Pro
Mini is like the Arduino Mini (same pin out) but to keep the cost low,
we used all SMD components, made it two layer, etc. This board
connects directly to the FTDI Basic Breakout board and supports
auto-reset. The Arduino Pro Mini 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. There is a voltage regulator on board so it can
accept voltage up to 12VDC. If you're supplying unregulated power to
the board, be sure to connect to the "RAW" pin on not VCC.

The latest and greatest version of this board breaks out the ADC6 and
ADC7 pins as well as adds footprints for optional I2C pull-up
resistors! We also took the opportunity to slap it with the OSHW logo.

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

Features:

* ATmega328 running at 8MHz with external resonator (0.5% tolerance)
* USB connection off board
* Supports auto-reset
* 3.3V regulator
* Max 150mA output
* Over current protected
* Reverse polarity protected
* DC input 5V up to 12V
* On board Power and Status LEDs

Dimensions:

* 0.7x1.3" (18x33mm)
* Less than 2 grams