Here's a technical variant of a diagram called a ladder design. The primary intention of this diagram will be to demonstrate the logic (speaking to electric control) of a circuit board. This really is the one that I mostly encounter in my line of work, and it is very effective for troubleshooting issues or learning the way the circuit works. Some circuits are so huge that many types of schematic diagrams need to be read in increments from novel form (usually with coded numbers so that info can be simpler found). Again, here's the identical specific circuit since the first 2, however considering it in ladder type.
Here is another schematic diagram showing exactly the same circuit, connections and components and it looks different but they both fall into exactly the same category.
A design diagram refers to a particular sort of circuit diagram which uses standard electrical/electronic symbols instead of pictures to demonstrate the way the circuit (or portion of it) works. Below is a normal 3-wire motor controller circuit employing a typical momentary stop - start pushbutton channel working with a schematic diagram. (Momentary here means that the button/switch you activate will go back to its default place once you let go of it, typically by a spring which forces the button/switch to get this done.)
Pictorial schematic diagrams, or pictorial circuit diagrams are essentially the exact identical thing with the same purpose, but they use images of elements inside the circuit instead of symbols. Again, here's the exact specific circuit (virtually except a control transformer was added and they are using conductors L1 and L3 instead of L1 and L2.
Less mess, right? I've got enough info in each these diagrams to know just what this circuit does and also where to look for problems. Hope that this helps. ( Note: don't confuse circuit or schematic diagrams with wiring diagrams; wiring diagrams will often show pictures of components like the pictorial, and also the way the whole or part of a circuit is wired. The distinction is that wiring diagrams typically place an emphasis on actual physical place of necessary components relative to each other that essentially tell a layman exactly what to do about the wiring)
Think of it in this way; a circuit structure is any kind of diagram that demonstrates how a circuit functions where the main goal is that the proper wiring of components and their relationship to each other rather than physical place relative to each other or intending prototypes. Nevertheless, in some applications classifying diagrams can be hard so accept this as general information. I have discovered this is especially true when working with more complicated circuits and electronics. I'm going to work with a more straightforward but average industrial circuit because these circuit setups are the exact same, but yet where it is possible to see how each sort of diagram indicates the purpose of the circuit in their own ways.