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Getting Started with Arduino UNO. This document explains how to connect your Uno board to the computer and upload your first sketch. The Arduino Uno is programmed using the Arduino Software (IDE), our Integrated Development Environment common to all our boards and running both online and offline.
Arduino is a hardware and software platform for making interactive projects with sensors, lights, motors, and actuators. Learn how to use Arduino, buy products, join the community, and access tutorials and tips.
Find the latest versions of Arduino software for Windows, Linux, macOS and Chromebook. Program your Arduino boards with the Arduino IDE, Cloud Editor, MicroPython or Arduino PLC IDE.
- Programming
- Warnings
- Differences with Other Boards
- Power
- Memory
- Input and Output
- Communication
- Automatic (Software) Reset
- Revisions
The Arduino Uno can be programmed with the (Arduino Software (IDE)). Select "Arduino Uno from the Tools > Board menu (according to the microcontroller on your board). For details, see the reference and tutorials. The ATmega328 on the Arduino Uno comes preprogrammed with a bootloader that allows you to upload new code to it without the use of an ext...
The Arduino Uno has a resettable polyfuse that protects your computer's USB ports from shorts and overcurrent. Although most computers provide their own internal protection, the fuse provides an extra layer of protection. If more than 500 mA is applied to the USB port, the fuse will automatically break the connection until the short or overload is ...
The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega16U2 (Atmega8U2 up to version R2) programmed as a USB-to-serial converter.
The Arduino Uno board can be powered via the USB connection or with an external power supply. The power source is selected automatically. External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery ca...
The ATmega328 has 32 KB (with 0.5 KB occupied by the bootloader). It also has 2 KB of SRAM and 1 KB of EEPROM (which can be read and written with the EEPROM library).
See the mapping between Arduino pins and ATmega328P ports. The mapping for the Atmega8, 168, and 328 is identical. PIN MAPPING ATmega328P Each of the 14 digital pins on the Uno can be used as an input or output, using pinMode(),digitalWrite(), and digitalRead()functions. They operate at 5 volts. Each pin can provide or receive 20 mA as recommended ...
The Arduino Uno has a number of facilities for communicating with a computer, another Arduino board, or other microcontrollers. The ATmega328 provides UART TTL (5V) serial communication, which is available on digital pins 0 (RX) and 1 (TX). An ATmega16U2 on the board channels this serial communication over USB and appears as a virtual com port to s...
Rather than requiring a physical press of the reset button before an upload, the Arduino Uno board is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines (DTR) of the ATmega8U2/16U2 is connected to the reset line of the ATmega328 via a 100 nanofarad capacitor. When this li...
Revision 3 of the board has the following new features: 1. 1.0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible with both the board that uses the AVR, which operates...
- Arduino
- 7-12V
- 6-20V
- ATmega328P
The Arduino Uno is an open-source microcontroller board based on the Microchip ATmega328P microcontroller (MCU) and developed by Arduino.cc and initially released in 2010. [ 2 ] [ 3 ] The microcontroller board is equipped with sets of digital and analog input/output (I/O) pins that may be interfaced to various expansion boards (shields) and ...
Learn how to use the Arduino UNO R3 board with the Arduino IDE. Follow the steps to download, install, select and upload sketches to your board.
Learn about the classic Arduino UNO board, its pins, microcontroller, power supply, and more. See how to use the digital, analog, serial, PWM, SPI, I2C, and other pins for various purposes.
