Just enough to get you interested, but not enough to do it for you: that was the goal of this chapter. Designing your own circuits (or borrowing them from others) is a wonderfully engaging activity. It pulls in several different parts of your brain and makes them cooperate to achieve the goal. This gives some people headaches. Other people get great ideas.
A circuit can be as simple or as complex as you need it to be. Start simple, prove what works, and try to understand why. Then move on to more complex designs. And repeat. Always repeat. Build your skill set, and you build yourself.
Now that you’ve got a good idea about the hard stuff, let’s dive deep into some of that soft stuff in the next chapter. How hard could it be?