Arduino uno User Manual

Load the blinking LED sketch from Chapter 1, Welcome to the Arduino, on
page 3, and compile it again. The output in the message panel should look
like this:
Note that the IDE updates some of the Preferences values when it shuts down.
So before you change any preferences directly in the preferences.txt file, you
have to stop the Arduino IDE.
Now that you’re familiar with the Arduino IDE, let’s do some programming.
We’ll make the Arduino talk to the outside world.
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Changing Preferences • 27
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Arduino uno Specifications

General

Form factor	Arduino
Certification	RoHS, FC, CE
Processor model	-
Processor frequency	- MHz
Microcontroller model	ATmega328
Microcontroller frequency	16 MHz
DC input voltage	7-12 V
Operating voltage	5 V
DC current per I/O pin	40 mA
Flash memory	0.032 MB
Maximum internal memory	- GB
SRAM (Static Random Access Memory)	2 KB
EEPROM (Electrically Erasable Programmable Read-Only Memory)	1 KB
Wi-Fi	No
Number of analog I/O pins	6
Number of digital I/O pins	14

Weight and Dimensions

Board dimensions	53.4 x 68.6 mm