Chapter 27 Solder Circuit Board
From previous chapters, we have learned the knowledge of electronic circuit and component, and build a
variety of circuits. Now, we will take a further step, making a piece of circuit board on your own.
We will use the general board to solder the circuit and components. And when this chapter is over, it’s our
hope to help you master the idea of how to design your own circuit, build and print circuit boards.
To finish this chapter, you need to prepare the necessary soldering equipments, including electric iron and
solder. We have prepared the general board for you, please pay attention to safety when you operate these
projects.
Project 27.1 Solder a Buzzer
We have tried to use the buzzer from previous chapter, and now we will solder a circuit that when the button
is pressed, the buzzer sounds
This circuit doesn’t need programming and can work when it is powered on. And when the button is not
pressed, there is no power consumption.
You can install it on your bike, bedroom door or any other places where it is needed.
Component list
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