Chapter 2
Manipulating Electricity to Make Something Happen
In This Chapter
Getting electrons mobilized
Finding a source of electrical force
Being positive about the direction of current
Shedding light on a circuit in action
Taking control over electron flow
Sending current this way and that way
Electronics is all about controlling the flow of electrons (electric current) through conductors in a complete path (circuit) so that the electrical energy delivered to a load (such as a light bulb, motor, or speaker) is “shaped” in just the right way. By manipulating the flow of electrons, electronic components enable you to do some amazing things with electricity, such as vary the sound produced by speakers, change the direction and speed of motors, and control the intensity and timing of lights, among many other things. In other words, electronics doesn’t make electricity — it makes electricity ...
