This chapter will show you how to create sound with electronic components! Unlike other projects you’ve built so far, this chapter’s projects use an integrated circuit (IC), which is a whole circuit that’s been shrunk down and packaged inside a tiny box. All sorts of circuits can be built as ICs, and most household devices are full of them. Peek inside a computer or an electronic toy, and you’re sure to find a few.

To start, I’ll explain what an IC is in more detail and describe how to figure out what a particular IC does. Then, you’ll get some practice with ICs by building a simple circuit that makes some strange ...

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