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Mastering Arduino by Jon Hoffman

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Running the project

When we run this project, we should see a result similar to the following screenshot:

Now try sprinkling the rain sensor board (the part of the raindrop sensor that senses the rain) with water and see how it changes the rain output.

NOTE: Always use caution when using water around electronic projects. If you get your Arduino or other electronic component wet you will damage them. When working with AC power with relays, you also run the risk of electrocution.

Now let's look at the challenge.

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