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Arduino Uno R3

Arduino Uno R3  - The advantage of using an Arduino board is that it uses an open-source platform. The schematics of the board are available online. You need an Integrated Development Environment (IDE) to write programs on the board. The Arduino Uno R3 is one of the first boards of Arduino. All of the essential utilities are inside the Arduino Uno R3, making it perfect for beginners.  The term ‘Uno’ is considered to indicate ‘One’ in Italian. It is named to reflect Arduino 1.0 – the upcoming release of Arduino. It is the latest development of the series of USB Arduino boards and differs from all the preceding boards.

What is Arduino Uno R3?

The Arduino Uno R3 is open-source integration (microcontroller) that reflects the Atmega328 chip module. This mechanism further unites 14 digital (input/output) pins, a B-type USB port for connection, 6 analog input pins, an Onboard ceramic resonator (16 MHz), an ICSP header, DC power jack, as well as a microcontroller resent button. Further, Arduino Uno R3 features everything required to support the microcontroller alongside easy-to-use mechanisms. One can connect it with the computer using a USB port and power it using a DC adaptor to proceed with the application. 

The microcontroller used is an ATmega328. The Arduino Uno R3 has 20 digital pins, 6 of these pins are for Pulse Width Modulation (PWM), and 6 other pins for analog inputs. It has a 2.1mm center-positive plug for power and uses a B-type USB connection to upload programs.

You need an Integrated Development Environment (IDE) to write programs on the board. For alternative programming interfaces, the in-circuit system programming or ICSP header can be useful. The Arduino boards have a massive support community that you can access through

Arduino Uno R3 is the 3rd edition of the Uno that adopts several changes than the previous editions. Some of the key changes are as listed below:

  • The latest edition integrates three new pins that are duplicates of previous pins.
  • You can see the IOREF pin next to the reset pin.It is a duplicate unit part of the 5V pin.
  • Arduino Uno R3 brings I2C pins on the side of the board.
  • Further,a new USB chip (Atmega16U2 – 16K Flash) takes place of the previous (Atmega8U2 – 8K Flash) chip.
  • The reset button is more accessible as it is moved near the USB connector.

Arduino Uno R3 – Specifications

Underneath, here’re various specifications of the Arduino Uno R3 unit:

  • Microcontroller: ATmega328P
  • Digital input and output pins: 14
  • Digital input & output pins (PWM): 6
  • Analog I/P pins: 6
  • Flash Memory: 32 KB
  • SRAM: 2 KB
  • EEPROM: 1 KB
  • In-Built LED: Yes
  • Operating Voltage: 5V
  • Recommended input voltage: 7V to 12V
  • I/P voltage (limit): 6V to 20V
  • DC Current (for each I/O Pin): 20 mA
  • DC Current (for 3.3V Pin): 50 mA
  • CLK speed: 16 MHz
  • Length and width: 68.6 mm X 53.4 mm
  • Weight: 25 g

Circuit Rocks

Arduino Uno R3

Arduino Uno R3

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