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File:Power and Pin13 LED on Arduino Compatible Board.jpg - Wikimedia Commons
The Arduino built-in LED
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The Arduino built-in LED
![Getting Started - Arduino Cookbook, 3rd Edition [Book]](https://www.oreilly.com/api/v2/epubs/9781491903513/files/assets/acb3_0104.png "Getting Started - Arduino Cookbook, 3rd Edition [Book]")
Getting Started - Arduino Cookbook, 3rd Edition [Book]
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Graphical Programming Tutorial for Arduino – Blinking the On-board LED « osoyoo.com
What is the solution for this problem? How do I connect a 64 LED with an Arduino Uno R3? The Arduino has only 13 pins for a digital I/o.' - Quora
BLINKING THE ONBOARD LED - Arduino tutorial #1 - YouTube
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