Consider it in this way; a circuit diagram is any type of diagram that illustrates how a circuit functions where the primary purpose 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 Assessing diagrams can be challenging so do this as general advice. I have found this is especially true when working with much more complicated circuits and electronics. I'm going to use a more straightforward but average industrial circuit since these circuit setups are the exact same, but yet where you're able to observe how each type of diagram indicates the role of the circuit in their own manners.
Following is a specialized version of a diagram. The major purpose of this diagram is to show the logic (referring to electrical control) of a circuit. This really is the one I mainly come across in my line of work, and it is very successful for troubleshooting issues or learning the way the circuit works. Some circuits are so enormous that many kinds of schematic diagrams need to be recorded in increments from novel form (usually with coded numbers so that information can be easier found). Again, here is the exact same precise circuit because the first two, however, looking at it in ladder form.
A design diagram refers to a particular sort of circuit design that utilizes standard electrical/electronic symbols rather than pictures to demonstrate how a circuit (or a part of it) works. Below is a standard 3-wire motor controller circuit employing a standard momentary stop - start pushbutton station working with a schematic diagram. (Momentary here means that the button/switch you trigger will go back to its default place once you let go of this, typically by a spring which forces the button/switch to do this.)
Less clutter, right? I've got enough info in each one of these diagrams to know just what this circuit will do and where to search for problems. Hope that this helps. ( Note: do not confuse circuit or schematic diagrams together with wiring diagrams; wiring diagrams will often demonstrate images of elements such as the pictorial, and the way the entire or portion of a circuit is wired. The distinction is that wiring diagrams usually put an emphasis on actual physical location of necessary elements relative to each other that basically tell a layman Just What to do concerning the wiring. )
Here's another schematic diagram showing exactly the same circuit, components and connections and it looks different but they both fall into precisely exactly the exact same category.
Pictorial schematic diagrams, or pictorial circuit diagrams are basically the exact same thing with the exact same function, but they use pictures of components within the circuit instead of symbols. Again, here's the exact precise circuit (almost except a control transformer was inserted and they're using conductors L1 and L3 rather than L1 and L2.