4 2011-07-08 SparkFun <p> <span style="font-weight: bold;">Description:</span> It&#39;s blue! It&#39;s thin (0.8mm)! It&#39;s the Arduino Pro Mini! SparkFun&#39;s minimal design approach to Arduino. This is a 3.3V Arduino running the 8MHz bootloader (select &#39;Arduino Duemilanove w/ 328&#39; 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 Duemilanove. It&#39;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.</p> <p> 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.</p> <p> Can&#39;t decide which Arduino is right for you? <a classname="" href="http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=148" name="" target="">Arduino buying guide</a>!</p> <p> <span style="font-weight: bold;">Features:</span></p> <ul> <li> ATmega328 running at 8MHz with external resonator (0.5% tolerance)</li> <li> Low-voltage board needs no interfacing circuitry to popular 3.3V devices and modules (GPS, accelerometers, sensors, etc)</li> <li> USB connection off board</li> <li> Supports auto-reset</li> <li> 3.3V regulator</li> <li> Max 150mA output</li> <li> Over current protected</li> <li> Reverse polarity protected</li> <li> DC input 3.3V up to 12V</li> <li> On board Power and Status LEDs</li> </ul> <p> <span style="font-weight: bold;">Dimensions:</span></p> <ul> <li> 0.7x1.3&quot; (18x33mm)</li> <li> Less than 2 grams</li> </ul> <p> <span style="font-weight: bold;">Documents: </span></p> <ul> <li> <a classname="" href="http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Boards/Arduino-Pro-Mini-v12.pdf" target="_blank">Schematic</a></li> <li> <a classname="" href="http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Boards/Arduino-Pro-Mini-v12.zip" target="_blank">Eagle Files</a></li> <li> <a classname="" href="http://www.arduino.cc/en/Main/ArduinoBoardProMini" name="" target="_blank">Arduino Pro Mini Homepage</a></li> <li> <a classname="" href="http://www.arduino.cc/en/Guide/ArduinoProMini" name="" target="_blank">Getting Started Tutorial</a></li> </ul> Arduino Pro Mini 3.3V http://www.sparkfun.com/products/9220 Arduino Pro /obsolete/Microcontroller Board (Arduino) 3.3V 14 4 DTR

TXO

RXI

VCC

GND

GND

A4

A5

RAW

GND

RESET

VCC

A3

A2

A1

A0

SCK

MISO

MOSI

D10

D9

D8

D7

D6

D5

D4

D3

D2

GND

RESET

RXI

TXO