SparkFun Arduino Pro Mini 328 and Pro 328 Boards are based on the ATmega328 and come in 3.3V/8MHz and 5V/16MHz versions. The boards have 14 digital input/output pins (of which 6 can be used as PWM outputs). The boards also have 6 analog inputs, a battery power jack, a power switch, a reset button, holes for mounting a power jack, an ICSP header, and pin headers. A six-pin header can be connected to an FTDI cable or Sparkfun breakout board to provide USB power and communication to the board.
