Here's a technical variant of a design diagram. The primary aim of this diagram is to show the logic (speaking to electrical management ) of a circuit board. This really is the one I mostly come across in my own line of work, and it's very effective for troubleshooting problems or learning the way the circuit functions. Some circuits are so enormous that most types of schematic diagrams need to be read in increments from novel form (usually with coded numbers so information can be simpler found). Again, here is the exact identical precise circuit because the first 2, however considering it in ladder form.
Here is another schematic diagram showing exactly the same circuit, connections and components and it looks different but they fall into precisely exactly the identical category.
Pictorial design diagrams, or graphic circuit diagrams are basically the same thing with the exact identical purpose, but they use images of components within the circuit instead of symbols. Again, here is the exact specific circuit (virtually except a control transformer was included and they are utilizing conductors L1 and L3 rather than L1 and L2.
Think of it in this way; a circuit structure is any kind of diagram that illustrates how a circuit functions where the most important purpose is the appropriate wiring of components and their relationship to each other rather than physical place relative to each other or planning prototypes. However, in some uses classifying diagrams can be challenging so accept this as general advice. I've found this is especially true when working with much more complex circuits and electronic equipment. I'm likely to work with a simpler but typical industrial circuit because these circuit set ups are the exact same, but yet where it is possible to see how each type of diagram shows the function of the circuit in their own ways.
Less mess, right? I have enough information in all these diagrams to know precisely what this circuit will do and also where to search for problems. Hope this helps. ( Note: do not confuse lecture or circuit diagrams together with wiring diagrams; wiring diagrams will typically show pictures of elements like the pictorial, and the way the whole or portion of a circuit will be wired. The difference is that wiring diagrams generally place an emphasis on real physical location of necessary elements relative to each other that basically tell a layman Just What to do concerning the wiring. )
A schematic diagram refers to a specific type of circuit structure that uses standard electrical/electronic symbols instead of images to demonstrate how a circuit (or a part of it) functions. Below is a standard 3-wire motor control circuit employing a standard momentary stop - start pushbutton channel working with a schematic diagram. (Momentary this means that the button/switch you trigger will return to its default place once you physically let go of it, typically by a spring which forces the button/switch to do this.)