Arduino Uno Rev3 - Oomipood
Arduino Board Uno Rev3-Atmega 328: First Steps - Embedded Lab
Arduino Open-Source Single Board Computer Boards - Arduino A000073 The Arduino Uno SMD is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs) 6 analog inputs a 16 MHz crystal oscillator a USB connection a power jack an ICSP header and a reset button. It contains everything needed to support the microcontroller - simply connect it to a computer with a USB cable or power it with a AC-to-DC adaptor or battery to get started.
Arduino Uno Rev3 SMD A000073
UNO R3 Arduino Documentation
Build an Arduino Uno R3 From Scratch Part 1
Arduino UNO R3 ATmega16U2 ATmega328 (DIP)
ARDUINO UNO REV3
Microcontroller Microchip ATmega328P Operating Voltage 5V USB Standard Type B Digital I/O Pins 14 PWM Digital I/O Pins 6 Analog Input Pins 6 Flash
Arduino Uno REV3 [A000066]
Arduino Uno Rev3 - OKdo
First Steps with the Arduino-UNO R3