Arduino uno - Uno R3 Atmega328p
Micro-controller : ATmega328.
Operating Voltage : 5V.
Input Voltage (recommended) : 7-12V.
Digital I/O Pins : 14 (of which 6 provide PWM output).
Analog Input Pins : 6.
The Arduino Uno R3 with Cable is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs); 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button.