The Arduino Pro Mini is an ATmega168 based microcontroller board. The board comes with built-in arduino bootloader. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 8 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers. The board can be connected to the PC using USB port and the board can runs on USB power.
There are two version of the Pro Mini. One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz.
Arduino Pro Mini DETAILS
3.3V or 5V
3.35 -12 V (3.3V model) or 5 – 12 V (5V model)
Digital I/O Pins
14 (of which 6 provide PWM output)
Analog Input Pins
DC Current per I/O Pin
16 KB (of which 2 KB used by bootloader)
8 MHz (3.3V model) or 16 MHz (5V model)