Step 16: About Parallel and Series Circuits
In the previous step, you incorporated two separate components into the same circuit- the buzzer and the LED. Whenever two components are included into the same circuit, there are two different ways they can be wired: in series or in parallel. The figure below shows the difference between these two types of circuits.
In the series circuit, both components are connected in a row, with electricity passing first through one then the other. In the parallel circuit, electricity passes through both components at the same time. A major advantage of parallel circuits is that if one component malfunctions, the other continues to function. In a series circuit, when one component breaks, both components stop working, as shown in Figure.