One of the most important thing that you need to know when you start to design a circuit project or when you want to make a printed circuit board of an existing project , is electronic circuit symbols . If you don’t know at least the main ( most used ) schematic circuit symbols it is very hard to start building a electronic project . In this article we will present the most used electronic components symbols .
In high-fidelity audio systems is necessary to use multiple speakers for clear sound . Because that one speaker can’t play all frequency of the audio band it’s is necessary to use multiple speakers and some audio filters . Filters are used to select or pass desired signals and reject or block undesired signals. In our case , an audio filter will let to pass some of audio frequencies ( from the audio band ) or block some audio frequencies ( from the audio band )