Arduino Uno R3 -ATmega328.

Description

The Arduino Uno R3 is a microcontroller board based on the ATmega328P (datasheet) chip used mostly for development and prototyping. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button.