Arduino Pro Mini 328
is a 3.3V Arduino running the 8MHz boot loader. 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. In order to accomplish this 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.