Arduino digitalread() Digital Input Tutorial
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![Arduino pin - Mastering Arduino [Book]](https://www.oreilly.com/api/v2/epubs/9781788830584/files/assets/e02fd8cb-b102-48c1-94ea-dfb1810a644b.png "Arduino pin - Mastering Arduino [Book]")
Arduino pin - Mastering Arduino [Book]
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