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Arduino UNO R3 User Manual

Arduino UNO R3
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Arduino® UNO R3
7 / 13 Arduino® UNO R3 / Rev. 01 - 25/11/2021
4 Board Operation
4.1 Getting started - IDE
If you want to program your Arduino UNO while offline you need to install the Arduino Desktop IDE [1] To connect
the Arduino UNO to your computer, you’ll need a Micro-B USB cable. This also provides power to the board, as
indicated by the LED.
4.2 Getting started - Arduino Web Editor
All Arduino boards, including this one, work out-of-the-box on the Arduino Web Editor [2], by just installing a simple
plugin.
The Arduino Web Editor is hosted online, therefore it will always be up-to-date with the latest features and support
for all boards. Follow [3] to start coding on the browser and upload your sketches onto your board.
4.3 Getting started - Arduino IoT Cloud
All Arduino IoT enabled products are supported on Arduino IoT Cloud which allows you to Log, graph and analyze
sensor data, trigger events, and automate your home or business.
4.4 Sample Sketches
Sample sketches for the Arduino XXX can be found either in the “Examples” menu in the Arduino IDE or in the
“Documentation” section of the Arduino Pro website [4]
4.5 Online Resources
Now that you have gone through the basics of what you can do with the board you can explore the endless
possibilities it provides by checking exciting projects on ProjectHub [5], the Arduino Library Reference [6] and the
online store [7] where you will be able to complement your board with sensors, actuators and more

Questions and Answers:

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Arduino UNO R3 Specifications

General IconGeneral
MicrocontrollerATmega328P
Operating Voltage5V
Input Voltage (recommended)7-12V
Input Voltage (limit)6-20V
Digital I/O Pins14 (of which 6 provide PWM output)
PWM Digital I/O Pins6
Analog Input Pins6
DC Current per I/O Pin20 mA
DC Current for 3.3V Pin50 mA
Flash Memory32 KB (ATmega328P) of which 0.5 KB used by bootloader
SRAM2 KB (ATmega328P)
EEPROM1 KB (ATmega328P)
Clock Speed16 MHz
LED_BUILTIN13
Length68.6 mm
Width53.4 mm
Weight25 g

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