The Pro Mini is functionally identical to the extremely popular and easy-to-use open source Arduino Pro Mini. It has 12 digital input/output pins (five of them can be used as a PWM output), 8 analog inputs, a 16 MHZ resonator and a reset button.
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 and not VCC.
This package comes with comes with 3 strips of male header pins.
Microcontroller: ATmega328 running at 16MHz with external resonator (0.5% tolerance)
Clock Speed: 16 MHz
Operating Voltage: 5V
Input Voltage (recommended): 5-12V
Digital I/O Pins: 14 (6 capable as PWN outputs)
Analog Input Pins: 8
Max 150mA output
Reverse polarity protected
Flash Memory 32KB
SRAM: 2 KB
EEPROM: 1 KB
Dimension (mm): 33 x 18 x 6