Here's another schematic diagram demonstrating the identical circuit, connections and components and it seems different but they both fall into the exact same category.
Think of it in this way; a circuit structure is any sort of diagram that illustrates the way the circuit operates where the primary goal is the proper wiring of elements and their connection to each other instead of physical place relative to each other or planning prototypes. However, in some uses classifying diagrams can be challenging so consider this as general advice. I have found this is particularly true when working with more complex circuits and electronic equipment. I'm likely to work with a more straightforward but typical industrial circuit because these circuit set ups are the exact same, but nevertheless where you can see how each sort of diagram shows the function of the circuit in their own ways.
Following is a variant of a diagram called a ladder diagram. The principal point of this diagram will be to show the logic (speaking to electrical control) of a circuit board. This really is the one I mainly encounter in my line of work, and it's extremely successful for troubleshooting issues or learning how a circuit works. Some circuits are so enormous that many kinds of schematic diagrams have to be read in increments from book form (typically with coded numbers so information can be easier located ). Again, here is the same exact circuit as the first 2, however considering it in ladder type.
Right, Less mess? I've got enough information in each of these diagrams to know exactly what this circuit will do and where to look for problems. Hope that this helps. ( Note: do not confuse lecture or circuit diagrams with wiring diagrams; wiring diagrams will usually show images of components like the pictorial, and how the whole or portion of a circuit will be wired. The difference is that wiring diagrams usually put an emphasis on real physical location of necessary components relative to each individual that essentially tell a layman Just What to do about the wiring. )
A design diagram refers to a particular kind of circuit design that utilizes standard electrical/electronic symbols rather than pictures to demonstrate how a circuit (or part of it) works. Below is a typical 3-wire motor controller circuit employing a typical short stop stop - start pushbutton station employing a schematic diagram. (Momentary this means the button/switch you trigger will return to its default location once you physically let go of it, typically by a spring that compels the button/switch to do this.)
Pictorial schematic diagrams, or pictorial circuit diagrams are basically the identical thing with exactly the same purpose, but they use pictures of elements within the circuit instead of symbols. Again, here's the exact same precise circuit (almost except a controller was added and they're using conductors L1 and L3 instead of L1 and L2.