The Arduino Pro Mini is a microcontroller board based on the ATmega168 (datasheet). Runs at 3.3V and 8 MHz. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers. A six pin header can be connected to an FTDI cable or breakout board to provide USB power and communication to the board. The Arduino Pro Mini is intended for semi-permanent installation in objects or exhibitions. The board comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires. The pin layout is compatible with the Arduino Mini.

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Microcontroller ATmega168 Operating Voltage 3.3V Input Voltage 3.35 - max 12 V (3.3V model) Digital I/O Pins 14 (of which 6 provide PWM output) Analog Input Pins 6 DC Current per I/O Pin 40 mA Flash Memory 16 KB (of which 2 KB used by bootloader) SRAM 1 KB EEPROM 512 bytes Clock Speed 8 MHz (3.3V model)