- microcontroller board based on the ATmega328.
- 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
- board comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires
- pin layout is compatible with the Arduino Mini
There is two versions of the Pro Mini: 3.3V and 8 MHz, 5V and 16 MHz.