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Arduino

Arduino Uno Rev. 3 Microcontroller Board

Arduino Uno Rev. 3 microcontroller development board is based on the Atmel ATmega328 MCU. The Arduino Uno has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. This Arduino MCU board 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 adapter or battery to get started. The Arduino Uno differs from other development boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega8U2 programmed as a USB-to-serial converter. The Arduino Uno MCU board can be powered via the USB connection or with an external power supply. The power source is selected automatically.

MCU
Operating
Voltage

Input
Voltage

Digital
I/O Pins

Analog
Input Pins

Flash
Memory

SRAM
EEPROM
Clock
Speed

ATmega328
5V
7-12V
14
6
32KB
2KB
1KB
16MHz

Arduino Uno Features

Power
  • Powered via USB connection or external power supply
    - with power source selected automatically
  • External (non-USB) power from an AC-to-DC adapter
    (wall-wart) or battery
  • Operates on external supply of 6 to 20V (7-12V recommended)

Memory
  • 32KB flash memory (with 0.5KB used for the bootloader)
  • 2KB SRAM
  • 1KB EEPROM

Input and Output
  • 14 digital pins that can be used as an input or output
  • 6 analog inputs, each of which provides 10 bits of resolution
    (i.e. 1024 different values)

Physical Characteristics
  • Max PCB length and width of 2.7in and 2.1in
  • USB connector and power jack extend beyond PCB
Communication
  • Designed to communicate with a computer,
    another Arduino, or other microcontrollers
  • ATmega328 provides UART TTL (5V)
    serial communication
  • On-board ATmega8U2 channels serial communication over USB
  • ATmega328 supports I²C (TWI) and
    SPI communication

Programming
  • Can be programmed with Arduino software
  • ATmega328 comes preburned with bootloader
    for uploading new code without external
    hardware programmer
  • MCU can be programmed through ICSP
    (In-Circuit Serial Programming) header

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Arduino Documentary

Arduino The Documentary (2010) English HD from gnd on Vimeo.

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