![First Sketch: Make an LED Blink - Environmental Monitoring with Arduino [Book]](https://www.oreilly.com/api/v2/epubs/9781449328603/files/httpatomoreillycomsourceoreillyimages971417.png "First Sketch: Make an LED Blink - Environmental Monitoring with Arduino [Book]")
First Sketch: Make an LED Blink - Environmental Monitoring with Arduino [Book]
nano pin 13 out - Programming Questions - Arduino Forum
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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
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