Alright, so understanding the purpose and functions of electronic components is important, but being able to understand various schematics is just as important. You need to know what a schematic is saying so you can replicate it in the real world; this is how you learn. You learn by going along with trial and error.
Take a look at the chart to the left. Here are just some of the symbols used to represent components. There are resistors, capacitors, diodes, transistors, LEDs, switches, relays... you name it. Unfortunately, well, depending on how you look at it, there are a lot of symbols to memorize, but like I said, that can go either way because, sure there may be more symbols out there, but that also means more options when it comes to making your circuits. So personally, I see this as a great thing! I like to have a variety when it comes to designing instead of being restricted to a certain set of limitations. That's just sucky.
Well, anyway... you'll see these symbols everywhere. You even saw them back in lesson #3 with the simple LED circuit. You saw a battery, a resistor, a switch, and of course, the LED. So, yeah. That's all I got for ya. We'll definitely use this very soon when we look over and dissect more complicated circuits in the next lesson or so. Credit for the photo goes to Forest M. Mims III from his engineering mini notebooks.
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