Key Highlights 

Microcontroller: Atmega328p – 8 BIT AVR controller

Operating Voltage: 5V

Raw Voltage input: 5V to 12V

Maximum current through each I/O pin: 40mA

Maximum total current drawn from the chip: 200mA

Flash Memory: 32Kbytes

EEPROM: 1Kbyte

Internal RAM: 2Kbytes

Clock Frequency: 16 MHz

Operating Temperature: -40ºC to +105ºC

Supports auto-reset

On-board Power and Status LEDs

Analog Pins: 8

Digital I/Os: 14

Description

Pro Mini is a compact yet powerful development Board. It works on the same ATmega328 microcontroller like UNO but is the only 1/3rd of the size of UNO. The size is reduced by removing an in-built programmer and the USB port, so pro mini requires an external programmer like an FTDI board to program it. The small size enables the board to be used on a PCB and other final applications.

Apart from the size, the specification of pro mini (5V) and UNO are almost similar and hence they both can exchange the same program.