It’s blue! It’s thin! It’s the Arduino Pro Mini! This is a 3.3V Arduino running the 8MHz bootloader. 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. This board connects directly to the FTDI Basic Breakout board and supports autoreset. The Arduino Pro Mini also works with the FTDI cable but the FTDI cable does not bring out the DTR pin so the autoreset 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.

Features:

• ATmega328 running at 8MHz with external resonator (0.5% tolerance)
• Lowvoltage board needs no interfacing circuitry to popular 3.3V devices and modules (GPS accelerometers sensors etc)
• 0.8mm Thin PCB
• USB connection off board
• Weighs less than 2 grams!
• Supports autoreset
• 3.3V regulator
• Max 150mA output
• Over current protected
• DC input 3.3V up to 12V
• On board Power and Status LEDs
• Analog Pins: 8
• Digital I/Os: 14
• 0.7×1.3 (18x33mm)

Documents:

• Schematic
• Eagle Files
• Graphical Datasheet
• GitHub